Tribological and electrochemical performances of HVOF sprayed NbC-NiCr coatings
A comparative test of pull-out strength performance of different insertion methods of poly barbed suspension threads.
Pre-treatment of Selective Laser Melting (SLM) surfaces for thermal spray coating Journal: Surface and Coatings Technology, Volume 441, 15 July 2022, 128533
Il ruolo del controllo di gestione nell’introduzione di tecnologie di Additive Manufacturing (AM): modelli teorici di costing e applicazioni operative
Sliding wear behaviour of fibre-reinforced PTFE composites against coated and uncoated steel. Journal: Wear, Volumes 486–487, 15 December 2021, 204097
Resistenza a corrosione dellacciaio inossidabile AISI316L in componenti ottenuti mediante tecnologia SLM La Metallurgia Italiana, N2, Anno112 (2020) p. 24
Alternative metallic matrices for WC-based HVOF coatings Surface & Coating Technology, 402 (2020)
TiC-NiCr Thermal spray coatings as an alternative to WC-CoCr and Cr3C2-NiCr Wear, 450-451 (2020) P. 203273
Properties of HFOV-sprayed TiC-FeCrAl Coatings Wear, 418-418 (2019) p. 36-51
ITSC - Next Generation Thermal Spraying for Future Surfaces - Quebec City (Canada) 22/5/2023-25/5/2023
Gehlen, L.R., Morelli S., Bolelli G., Pintaude G., Colella A., Forlin E., Puddu P., Lusvarghi L.
Development of NbC-based hardmetal coatings.
IMCAS World Congress 2022 Parigi, Dermatology, plastic surgery & aging science 3/6/2022-5/5/2022
d’Arienzo A., Franci R. Fundarò P.
A comparative test of pull-out strength performance of different insertion methods of poly(L-lactide-co-ε-caprolactone) barbed suspension threads
NETWORKING PER L’INNOVAZIONE Il valore aggiunto della ricerca industriale per la competitività, Clust-ER Mech, ART-ER, 12 Febbraio 2019, Tecnopolo di Ferrara
ll Sentiero International Campus Brings the Past into the Present with Materialise Magics
Open Innovation Scouting 2021, ART-ER, nov 2021.
Franci R., Gelsomini C.
Resistenza a corrosione dell’acciaio inossidabile AISI316L in
componenti ottenuti mediante tecnologia SLM
NETWORKING PER L’INNOVAZIONE Il valore aggiunto della ricerca industriale per la competitività, Clust-ER Mech, ART-ER, 12 Febbraio 2019, Tecnopolo di Ferrara
Franci R., Lusvarghi L.
Il Sentiero: Tecnologie e materiali avanzati per l’industria delle macchine automatiche
Giornata nazionale corrosione GNC
Giovanardi R. , Conte M. , Carolina G. , Franci R
Resistenza a corrosione dellacciaio inossidabile AISI316L in componenti ottenuti mediante tecnologia SLM
Rivestimenti Spessi, Placcatura e termo spruzzatura, organizzato dall' Associazione Italiana di Metallurgia
Sassatelli P.
Applicazione dei rivestimenti spessi al settore alimentare/packaging
MAM (Master Additive Manufacturing) 4-6 dec 2018
Casadei F., Franci R. , Gelsomini C.
The process qualification of the components in the packaging sector
Convegno su additive manufacturing (La Stampa 3D) 25 ottobre 2018, AEROPORTO MILITARE “F. BARACCA” CASERMA “GUIDONI” Via di Centocelle, 301 - Roma
SIC/Ecor International
Additive Manufacturing (La Stampa 3D)
2001 “A contribution to the surface analysis and characterization of HVOF coatings for petrochemical application”. Wear, Vol. 250, N° 1, October 2001, pp. 107-113 (7), Elsevier Science.
“Characterization of composite titanium nitride coatings prepared by reactive plasma spraying”, Electrochimica Acta, Vol. 50 Iss. 23, 2005, pp 4531-4537.
Brevetto Europeo “ALLOY COMPOSITION FOR THE MANUFACTURE OF PROTECTIVE COATINGS, ITS USE, PROCESS FOR ITS APPLICATION AND SUPER-ALLOY ARTICLES COATED WITH THE SAME COMPOSITION”, International application N° PCT/IT2005/000771
Production and characterization of duplex coatings (HVOF and PVD) on Ti6Al4V substrate”, Thin Solid Films, Vol. 515, 2006.
“Studies on a combined reactive plasma-sprayed/arc deposited duplex coating for titanium alloys”, Surface and Coating Technology, 201 (2006), 1200-1206.
“Thermal-sprayed dielectric coating EM properties evaluation via free-space measurements at microwave frequencies”, International Journal of Surface Science and Engineering, Vol. 2, Number 5/2008, pp. 385-399.
Corrosion behavior of aluminide diffusion coatings in low temperature molten carbonate electrolysis environments Materials and Corrosion (2018)
Interest on low-temperature molten carbonate electrolysis processes (T < 600 °C) for advanced energy conversion and storage applications appears to be progressively growing in literature. However, the corrosion of metallic materials in molten carbonate salts in equilibrium with the acidic CO2-rich electrolysis gas atmospheres has been scarcely studied. In this work, the corrosion stability of a low-activity FeAl aluminide diffusion coated 316 L stainless steel has been tested in a ternary carbonate eutectic mixture Li2CO3-Na2CO3-K2CO3 by 48 h-immersion tests at 500 °C under CO2 atmosphere. Before the corrosion testing, the coated steel samples were pre-oxidized in air at 750 °C in order to generate a protective thin alumina film on the aluminide coating surface. The salt immersion results indicate that FeAl aluminide coatings are not stable in acid molten carbonate environments due to rapid transformation of the pre-existing alumina film into a non-protective mixed Fe-Al oxide crystalline layer. Corrosion degradation has been found to consist of both general and localized forms of attack. Factors affecting FeAl aluminide coating corrosion have been analyzed and discussed in detail.
“Effect of Al Enrichment by Pack Cementation of FeCr Coatings Deposited by HVOF” Journal of Thermal Spray Technology 24 (2015) 244 – 251
A great contribution to CO2 emissions comes from coal fired power generation. Combination of carbon capture sequestering technologies with sustainable biomass conversion constitutes a decisive boost in limiting rise in global temperature. Co-firing alternative materials with pulverized coal and using oxy-fuel combustion conditions (oxy-fuel co-combustion) is a very attractive process for power industry. Materials with both high mechanical properties and high environmental resistance are required by such advanced combustion systems. One approach to improve high-temperature oxidation/corrosion resistance is to apply protective coatings. In the present work, low and high Cr content Fe-based alloys have been deposited in order to investigate the influence of Cr content on coating protective performance in oxy-fuel co-combustion conditions. Grade 91 steel has been assumed as reference substrate. Effect of Al enrichment on coating environmental resistance has also been analyzed. Activities have been performed within the framework of Macplus Project (Integrated Project co-founded by the European Commission under the 7th Framework Program in the Energy area).
“High temperature oxidation of MCrAlY coatings modified by Al2O3 PVD overlay” Surface and Coating Technologies 268 (2015) 198 – 204
In this study the high temperature oxidation behavior of NiCoCrAlTaY coatings modified by a PVD (physical vapor deposition) surface treatment was evaluated: the coatings, produced by HVOF (high velocity oxygen fuel) technique, were protected by an Al2O3 PVD sputtered overlay prior to top coating with an YSZ ceramic layer, and were exposed in air at 1100 C up to 400 h. The oxidation kinetics were evaluated by measuring the thickness of the TGO (thermally grown oxide) scale at several exposure times and the microstructural evolution induced by the heat treatments was investigated. The effect of the presence of the Al2O3 PVD overlay, in terms of microstructure and oxidation resistance, was assessed by comparing the performance of modified TBCs with unprotected NiCoCrAlTaY systems. Experimental evidence was gathered showing that the presence of an Al2O3 PVD overlay enhances the oxidation resistance of NiCoCrAlTaY coatings and promotes the adhesion between bond and top coat. A thermo-mechanical finite element model of the modified TBC system was also developed: the growth of the oxide scale was modeled and the previously assessed oxidation kinetics were implemented in order to estimate the effects of the PVD film on the mechanical stress field of the TBC system.
“High Temperature Oxidation and Microstructural Evolution of Modified MCrAlY Coatings” Metallurgical and Materials Transactions A 45 (2014) 1401 – 1408
Thermal sprayed MCrAlY coatings are widely used as a bond coat in thermal barrier systems to protect the substrate from corrosion and high temperature oxidation and to improve the compatibility between the ceramic top coat and metallic substrate. In this paper, the high temperature oxidation resistance of MCrAlY coatings with modified compositions was evaluated; in particular, the effect of the addition of reactive and refractory elements (Ta, Re, Si, and Hf) was investigated. MCrAlY coatings were obtained by high velocity oxygen fuel spray and vacuum plasma spray techniques; samples were exposed to air at 1423 K (1150 °C) and the oxidation kinetics were evaluated by measuring the thickness of the thermally grown oxide (TGO) scale at several exposure times. Experimental data confirmed that the oxidation resistance of MCrAlY coatings is strictly related to the amount of the reactive and refractory elements in the starting powders and that a thorough understanding of the microstructural modifications taking place during oxidation is essential for controlling TGO growth and thermal barriers durability.
"Indium tin oxide coatings properties as a function of the deposition atmosphere" Thin Solid Films, 520 (2012) 4041-4045
Indium tin oxide coatings were deposited by magnetron sputtering physical vapour deposition under different atmospheres. Microstructural, electrical, and optical properties were measured, finding a correlation among properties and process parameters. Texture analyses carried out by X-ray diffraction showed that films microstructure depended by the oxygen content in the deposition vessel: high values of the oxygen content (e.g., 5%) caused the film to grow along the <111> orientation; under pure Ar, the grains grew along the <100> orientation. Intermediate values of the oxygen content caused the growth of two families of grains, respectively oriented along the <111> and the <100> directions.
"Innovative AlNiIr alloy for bond coats:Microstructure, phase analysis and oxidation behaviour" Intermetallics 22 (2012) 241-250
Iridium modified nickel alluminides are considered promising bond coats due to the capability to promote α-Al2O3 scale growth and to develop the formation of Ir layer acting as oxygen diffusion barrier (ODB). An innovative Al–Ni–Ir alloy (Al 60 %at, Ni 35 %at, Ir 5 %at) was formulated, taking into account the bond coat appropriate requirements and the cost standpoint. A detailed and systematic microstructural investigation of both powder and bulk samples was reported, comparing the phase composition, thermal stability and oxidation behaviour of the proposed system with respect to the Ir free one. The analysed AlNiIr system was composed of Al3Ni2 and AlNi3, in addition to the β-NiAl, detected in the reference one. The Ir presence seemed to promote the alumina scale growth, starting at around 1000 °C. Both as cast and oxidised AlNiIr bulk samples showed Ni-poor and Al-rich islands, in which Ir resulted more concentrated, suggesting an iridium higher affinity towards Al with respect to Ni. After the oxidation at operative temperature (i.e. 1150 °C), the α-Al2O3 scale growth was observed, increasing the thickness with the dwelling time. Neither Ir ODB nor Ir rich islands at the interface between the alloy and the Al2O3 scale were identified, due to the low Ir amount. However the presence of metallic Ir and of the compound Al2.75Ir was detected in the powder after thermal treatment at 1000 °C.
“A multiscale numerical homogenization-based method for the prediction of elastic properties of components produced with the fused deposition modelling process” Results in Engineering Volume 14, June 2022.
“Development of a surface response methodology for assessing the cleanability of stainless steel in food industry (POSTER)” 3rd International Conference on Applied Surface Science 17-20 June 2019 | Pisa Congress Palace, Pisa, Italy
Tribo-corrosion behaviour of chromium carbide based coatings deposited by HVOF. Surface & Coatings Technology 268 (2015) 247-251
"Effect of Al Enrichment by Pack Cementation of FeCr Coatings Deposited by HVOF" Journal of Thermal Spray Technology 24 (2015) 244 – 251
"A hybrid approach to the development of a multilayer neural network for wear and fatigue prediction in metal forming" Tribology International, Volume 40, Issues 10-12, October-December 2007, Pages 1705-1717
"Study of contact fatigue phenomena influence on back-up rolls rolling campaign duration and grinding operations" AISTech 2011 and 18th International Forgemasters Meeting
“A new one-DoF fully parallel mechanism for modelling passive motion at the human tibiotalar joint" Journal of Biomechanics, 22;42(10):1403-8.
“A three-step procedure for the modelling of human diarthrodial joints”. International Journal of Mechanics and Control, 10(1), pp. 3 – 12.
”A one-degree-of-freedom spherical wrist for the modelling of passive motion of the human ankle joint”. In Proceedings of IAK 2008, Conference on Interdisciplinary Applications of Kinematics, A. Kecskemethy (eds.), 9–11 January 2008, Lima, Peru.
“New spatial mechanisms for the kinematic analysis of the tibiotalar joint.”, In Proceedings of i-FAB 2008, International Foot and Ankle Biomechanics Community, p. 1.
“A 5-5 one degree of freedom fully-parallel mechanism for the modelling of passive motion at the human ankle joint”, ASME-IDETC/CIE 2007, ASME International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, September 4-7, 2007, Las Vegas, Nevada, USA.
“Potentiality of a new code to study ligament-bone interactions in human joints”, Journal of Biomechanics Vol.40, Suppl.2 2007 (XXI Congress of the International Society of Biomechanics, 1-5th July 2007, Taipei, Taiwan) pp. S580
Tribological and electrochemical performances of HVOF sprayed NbC-NiCr coatings
A comparative test of pull-out strength performance of different insertion methods of poly barbed suspension threads.
Pre-treatment of Selective Laser Melting (SLM) surfaces for thermal spray coating Journal: Surface and Coatings Technology, Volume 441, 15 July 2022, 128533
Il ruolo del controllo di gestione nell’introduzione di tecnologie di Additive Manufacturing (AM): modelli teorici di costing e applicazioni operative
Sliding wear behaviour of fibre-reinforced PTFE composites against coated and uncoated steel. Journal: Wear, Volumes 486–487, 15 December 2021, 204097
Resistenza a corrosione dellacciaio inossidabile AISI316L in componenti ottenuti mediante tecnologia SLM La Metallurgia Italiana, N2, Anno112 (2020) p. 24
Alternative metallic matrices for WC-based HVOF coatings Surface & Coating Technology, 402 (2020)
TiC-NiCr Thermal spray coatings as an alternative to WC-CoCr and Cr3C2-NiCr Wear, 450-451 (2020) P. 203273
Properties of HFOV-sprayed TiC-FeCrAl Coatings Wear, 418-418 (2019) p. 36-51
ITSC - Next Generation Thermal Spraying for Future Surfaces - Quebec City (Canada) 22/5/2023-25/5/2023
Gehlen, L.R., Morelli S., Bolelli G., Pintaude G., Colella A., Forlin E., Puddu P., Lusvarghi L.
Development of NbC-based hardmetal coatings.
IMCAS World Congress 2022 Parigi, Dermatology, plastic surgery & aging science 3/6/2022-5/5/2022
d’Arienzo A., Franci R. Fundarò P.
A comparative test of pull-out strength performance of different insertion methods of poly(L-lactide-co-ε-caprolactone) barbed suspension threads
NETWORKING PER L’INNOVAZIONE Il valore aggiunto della ricerca industriale per la competitività, Clust-ER Mech, ART-ER, 12 Febbraio 2019, Tecnopolo di Ferrara
ll Sentiero International Campus Brings the Past into the Present with Materialise Magics
Open Innovation Scouting 2021, ART-ER, nov 2021.
Franci R., Gelsomini C.
Resistenza a corrosione dell’acciaio inossidabile AISI316L in
componenti ottenuti mediante tecnologia SLM
NETWORKING PER L’INNOVAZIONE Il valore aggiunto della ricerca industriale per la competitività, Clust-ER Mech, ART-ER, 12 Febbraio 2019, Tecnopolo di Ferrara
Franci R., Lusvarghi L.
Il Sentiero: Tecnologie e materiali avanzati per l’industria delle macchine automatiche
Giornata nazionale corrosione GNC
Giovanardi R. , Conte M. , Carolina G. , Franci R
Resistenza a corrosione dellacciaio inossidabile AISI316L in componenti ottenuti mediante tecnologia SLM
Rivestimenti Spessi, Placcatura e termo spruzzatura, organizzato dall' Associazione Italiana di Metallurgia
Sassatelli P.
Applicazione dei rivestimenti spessi al settore alimentare/packaging
MAM (Master Additive Manufacturing) 4-6 dec 2018
Casadei F., Franci R. , Gelsomini C.
The process qualification of the components in the packaging sector
Convegno su additive manufacturing (La Stampa 3D) 25 ottobre 2018, AEROPORTO MILITARE “F. BARACCA” CASERMA “GUIDONI” Via di Centocelle, 301 - Roma
SIC/Ecor International
Additive Manufacturing (La Stampa 3D)
2001 “A contribution to the surface analysis and characterization of HVOF coatings for petrochemical application”. Wear, Vol. 250, N° 1, October 2001, pp. 107-113 (7), Elsevier Science.
“Characterization of composite titanium nitride coatings prepared by reactive plasma spraying”, Electrochimica Acta, Vol. 50 Iss. 23, 2005, pp 4531-4537.
Brevetto Europeo “ALLOY COMPOSITION FOR THE MANUFACTURE OF PROTECTIVE COATINGS, ITS USE, PROCESS FOR ITS APPLICATION AND SUPER-ALLOY ARTICLES COATED WITH THE SAME COMPOSITION”, International application N° PCT/IT2005/000771
Production and characterization of duplex coatings (HVOF and PVD) on Ti6Al4V substrate”, Thin Solid Films, Vol. 515, 2006.
“Studies on a combined reactive plasma-sprayed/arc deposited duplex coating for titanium alloys”, Surface and Coating Technology, 201 (2006), 1200-1206.
“Thermal-sprayed dielectric coating EM properties evaluation via free-space measurements at microwave frequencies”, International Journal of Surface Science and Engineering, Vol. 2, Number 5/2008, pp. 385-399.
Corrosion behavior of aluminide diffusion coatings in low temperature molten carbonate electrolysis environments Materials and Corrosion (2018)
Interest on low-temperature molten carbonate electrolysis processes (T < 600 °C) for advanced energy conversion and storage applications appears to be progressively growing in literature. However, the corrosion of metallic materials in molten carbonate salts in equilibrium with the acidic CO2-rich electrolysis gas atmospheres has been scarcely studied. In this work, the corrosion stability of a low-activity FeAl aluminide diffusion coated 316 L stainless steel has been tested in a ternary carbonate eutectic mixture Li2CO3-Na2CO3-K2CO3 by 48 h-immersion tests at 500 °C under CO2 atmosphere. Before the corrosion testing, the coated steel samples were pre-oxidized in air at 750 °C in order to generate a protective thin alumina film on the aluminide coating surface. The salt immersion results indicate that FeAl aluminide coatings are not stable in acid molten carbonate environments due to rapid transformation of the pre-existing alumina film into a non-protective mixed Fe-Al oxide crystalline layer. Corrosion degradation has been found to consist of both general and localized forms of attack. Factors affecting FeAl aluminide coating corrosion have been analyzed and discussed in detail.
“Effect of Al Enrichment by Pack Cementation of FeCr Coatings Deposited by HVOF” Journal of Thermal Spray Technology 24 (2015) 244 – 251
A great contribution to CO2 emissions comes from coal fired power generation. Combination of carbon capture sequestering technologies with sustainable biomass conversion constitutes a decisive boost in limiting rise in global temperature. Co-firing alternative materials with pulverized coal and using oxy-fuel combustion conditions (oxy-fuel co-combustion) is a very attractive process for power industry. Materials with both high mechanical properties and high environmental resistance are required by such advanced combustion systems. One approach to improve high-temperature oxidation/corrosion resistance is to apply protective coatings. In the present work, low and high Cr content Fe-based alloys have been deposited in order to investigate the influence of Cr content on coating protective performance in oxy-fuel co-combustion conditions. Grade 91 steel has been assumed as reference substrate. Effect of Al enrichment on coating environmental resistance has also been analyzed. Activities have been performed within the framework of Macplus Project (Integrated Project co-founded by the European Commission under the 7th Framework Program in the Energy area).
“High temperature oxidation of MCrAlY coatings modified by Al2O3 PVD overlay” Surface and Coating Technologies 268 (2015) 198 – 204
In this study the high temperature oxidation behavior of NiCoCrAlTaY coatings modified by a PVD (physical vapor deposition) surface treatment was evaluated: the coatings, produced by HVOF (high velocity oxygen fuel) technique, were protected by an Al2O3 PVD sputtered overlay prior to top coating with an YSZ ceramic layer, and were exposed in air at 1100 C up to 400 h. The oxidation kinetics were evaluated by measuring the thickness of the TGO (thermally grown oxide) scale at several exposure times and the microstructural evolution induced by the heat treatments was investigated. The effect of the presence of the Al2O3 PVD overlay, in terms of microstructure and oxidation resistance, was assessed by comparing the performance of modified TBCs with unprotected NiCoCrAlTaY systems. Experimental evidence was gathered showing that the presence of an Al2O3 PVD overlay enhances the oxidation resistance of NiCoCrAlTaY coatings and promotes the adhesion between bond and top coat. A thermo-mechanical finite element model of the modified TBC system was also developed: the growth of the oxide scale was modeled and the previously assessed oxidation kinetics were implemented in order to estimate the effects of the PVD film on the mechanical stress field of the TBC system.
“High Temperature Oxidation and Microstructural Evolution of Modified MCrAlY Coatings” Metallurgical and Materials Transactions A 45 (2014) 1401 – 1408
Thermal sprayed MCrAlY coatings are widely used as a bond coat in thermal barrier systems to protect the substrate from corrosion and high temperature oxidation and to improve the compatibility between the ceramic top coat and metallic substrate. In this paper, the high temperature oxidation resistance of MCrAlY coatings with modified compositions was evaluated; in particular, the effect of the addition of reactive and refractory elements (Ta, Re, Si, and Hf) was investigated. MCrAlY coatings were obtained by high velocity oxygen fuel spray and vacuum plasma spray techniques; samples were exposed to air at 1423 K (1150 °C) and the oxidation kinetics were evaluated by measuring the thickness of the thermally grown oxide (TGO) scale at several exposure times. Experimental data confirmed that the oxidation resistance of MCrAlY coatings is strictly related to the amount of the reactive and refractory elements in the starting powders and that a thorough understanding of the microstructural modifications taking place during oxidation is essential for controlling TGO growth and thermal barriers durability.
"Indium tin oxide coatings properties as a function of the deposition atmosphere" Thin Solid Films, 520 (2012) 4041-4045
Indium tin oxide coatings were deposited by magnetron sputtering physical vapour deposition under different atmospheres. Microstructural, electrical, and optical properties were measured, finding a correlation among properties and process parameters. Texture analyses carried out by X-ray diffraction showed that films microstructure depended by the oxygen content in the deposition vessel: high values of the oxygen content (e.g., 5%) caused the film to grow along the <111> orientation; under pure Ar, the grains grew along the <100> orientation. Intermediate values of the oxygen content caused the growth of two families of grains, respectively oriented along the <111> and the <100> directions.
"Innovative AlNiIr alloy for bond coats:Microstructure, phase analysis and oxidation behaviour" Intermetallics 22 (2012) 241-250
Iridium modified nickel alluminides are considered promising bond coats due to the capability to promote α-Al2O3 scale growth and to develop the formation of Ir layer acting as oxygen diffusion barrier (ODB). An innovative Al–Ni–Ir alloy (Al 60 %at, Ni 35 %at, Ir 5 %at) was formulated, taking into account the bond coat appropriate requirements and the cost standpoint. A detailed and systematic microstructural investigation of both powder and bulk samples was reported, comparing the phase composition, thermal stability and oxidation behaviour of the proposed system with respect to the Ir free one. The analysed AlNiIr system was composed of Al3Ni2 and AlNi3, in addition to the β-NiAl, detected in the reference one. The Ir presence seemed to promote the alumina scale growth, starting at around 1000 °C. Both as cast and oxidised AlNiIr bulk samples showed Ni-poor and Al-rich islands, in which Ir resulted more concentrated, suggesting an iridium higher affinity towards Al with respect to Ni. After the oxidation at operative temperature (i.e. 1150 °C), the α-Al2O3 scale growth was observed, increasing the thickness with the dwelling time. Neither Ir ODB nor Ir rich islands at the interface between the alloy and the Al2O3 scale were identified, due to the low Ir amount. However the presence of metallic Ir and of the compound Al2.75Ir was detected in the powder after thermal treatment at 1000 °C.
“A multiscale numerical homogenization-based method for the prediction of elastic properties of components produced with the fused deposition modelling process” Results in Engineering Volume 14, June 2022.
“Development of a surface response methodology for assessing the cleanability of stainless steel in food industry (POSTER)” 3rd International Conference on Applied Surface Science 17-20 June 2019 | Pisa Congress Palace, Pisa, Italy
Tribo-corrosion behaviour of chromium carbide based coatings deposited by HVOF. Surface & Coatings Technology 268 (2015) 247-251
"Effect of Al Enrichment by Pack Cementation of FeCr Coatings Deposited by HVOF" Journal of Thermal Spray Technology 24 (2015) 244 – 251
"A hybrid approach to the development of a multilayer neural network for wear and fatigue prediction in metal forming" Tribology International, Volume 40, Issues 10-12, October-December 2007, Pages 1705-1717
"Study of contact fatigue phenomena influence on back-up rolls rolling campaign duration and grinding operations" AISTech 2011 and 18th International Forgemasters Meeting
“A new one-DoF fully parallel mechanism for modelling passive motion at the human tibiotalar joint" Journal of Biomechanics, 22;42(10):1403-8.
“A three-step procedure for the modelling of human diarthrodial joints”. International Journal of Mechanics and Control, 10(1), pp. 3 – 12.
”A one-degree-of-freedom spherical wrist for the modelling of passive motion of the human ankle joint”. In Proceedings of IAK 2008, Conference on Interdisciplinary Applications of Kinematics, A. Kecskemethy (eds.), 9–11 January 2008, Lima, Peru.
“New spatial mechanisms for the kinematic analysis of the tibiotalar joint.”, In Proceedings of i-FAB 2008, International Foot and Ankle Biomechanics Community, p. 1.
“A 5-5 one degree of freedom fully-parallel mechanism for the modelling of passive motion at the human ankle joint”, ASME-IDETC/CIE 2007, ASME International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, September 4-7, 2007, Las Vegas, Nevada, USA.
“Potentiality of a new code to study ligament-bone interactions in human joints”, Journal of Biomechanics Vol.40, Suppl.2 2007 (XXI Congress of the International Society of Biomechanics, 1-5th July 2007, Taipei, Taiwan) pp. S580
Tribological and electrochemical performances of HVOF sprayed NbC-NiCr coatings
A comparative test of pull-out strength performance of different insertion methods of poly barbed suspension threads.
Pre-treatment of Selective Laser Melting (SLM) surfaces for thermal spray coating Journal: Surface and Coatings Technology, Volume 441, 15 July 2022, 128533
Il ruolo del controllo di gestione nell’introduzione di tecnologie di Additive Manufacturing (AM): modelli teorici di costing e applicazioni operative
Sliding wear behaviour of fibre-reinforced PTFE composites against coated and uncoated steel. Journal: Wear, Volumes 486–487, 15 December 2021, 204097
Resistenza a corrosione dellacciaio inossidabile AISI316L in componenti ottenuti mediante tecnologia SLM La Metallurgia Italiana, N2, Anno112 (2020) p. 24
Alternative metallic matrices for WC-based HVOF coatings Surface & Coating Technology, 402 (2020)
TiC-NiCr Thermal spray coatings as an alternative to WC-CoCr and Cr3C2-NiCr Wear, 450-451 (2020) P. 203273
Properties of HFOV-sprayed TiC-FeCrAl Coatings Wear, 418-418 (2019) p. 36-51
ITSC - Next Generation Thermal Spraying for Future Surfaces - Quebec City (Canada) 22/5/2023-25/5/2023
Gehlen, L.R., Morelli S., Bolelli G., Pintaude G., Colella A., Forlin E., Puddu P., Lusvarghi L.
Development of NbC-based hardmetal coatings.
IMCAS World Congress 2022 Parigi, Dermatology, plastic surgery & aging science 3/6/2022-5/5/2022
d’Arienzo A., Franci R. Fundarò P.
A comparative test of pull-out strength performance of different insertion methods of poly(L-lactide-co-ε-caprolactone) barbed suspension threads
NETWORKING PER L’INNOVAZIONE Il valore aggiunto della ricerca industriale per la competitività, Clust-ER Mech, ART-ER, 12 Febbraio 2019, Tecnopolo di Ferrara
ll Sentiero International Campus Brings the Past into the Present with Materialise Magics
Open Innovation Scouting 2021, ART-ER, nov 2021.
Franci R., Gelsomini C.
Resistenza a corrosione dell’acciaio inossidabile AISI316L in
componenti ottenuti mediante tecnologia SLM
NETWORKING PER L’INNOVAZIONE Il valore aggiunto della ricerca industriale per la competitività, Clust-ER Mech, ART-ER, 12 Febbraio 2019, Tecnopolo di Ferrara
Franci R., Lusvarghi L.
Il Sentiero: Tecnologie e materiali avanzati per l’industria delle macchine automatiche
Giornata nazionale corrosione GNC
Giovanardi R. , Conte M. , Carolina G. , Franci R
Resistenza a corrosione dellacciaio inossidabile AISI316L in componenti ottenuti mediante tecnologia SLM
Rivestimenti Spessi, Placcatura e termo spruzzatura, organizzato dall' Associazione Italiana di Metallurgia
Sassatelli P.
Applicazione dei rivestimenti spessi al settore alimentare/packaging
MAM (Master Additive Manufacturing) 4-6 dec 2018
Casadei F., Franci R. , Gelsomini C.
The process qualification of the components in the packaging sector
Convegno su additive manufacturing (La Stampa 3D) 25 ottobre 2018, AEROPORTO MILITARE “F. BARACCA” CASERMA “GUIDONI” Via di Centocelle, 301 - Roma
SIC/Ecor International
Additive Manufacturing (La Stampa 3D)
2001 “A contribution to the surface analysis and characterization of HVOF coatings for petrochemical application”. Wear, Vol. 250, N° 1, October 2001, pp. 107-113 (7), Elsevier Science.
“Characterization of composite titanium nitride coatings prepared by reactive plasma spraying”, Electrochimica Acta, Vol. 50 Iss. 23, 2005, pp 4531-4537.
Brevetto Europeo “ALLOY COMPOSITION FOR THE MANUFACTURE OF PROTECTIVE COATINGS, ITS USE, PROCESS FOR ITS APPLICATION AND SUPER-ALLOY ARTICLES COATED WITH THE SAME COMPOSITION”, International application N° PCT/IT2005/000771
Production and characterization of duplex coatings (HVOF and PVD) on Ti6Al4V substrate”, Thin Solid Films, Vol. 515, 2006.
“Studies on a combined reactive plasma-sprayed/arc deposited duplex coating for titanium alloys”, Surface and Coating Technology, 201 (2006), 1200-1206.
“Thermal-sprayed dielectric coating EM properties evaluation via free-space measurements at microwave frequencies”, International Journal of Surface Science and Engineering, Vol. 2, Number 5/2008, pp. 385-399.
Corrosion behavior of aluminide diffusion coatings in low temperature molten carbonate electrolysis environments Materials and Corrosion (2018)
Interest on low-temperature molten carbonate electrolysis processes (T < 600 °C) for advanced energy conversion and storage applications appears to be progressively growing in literature. However, the corrosion of metallic materials in molten carbonate salts in equilibrium with the acidic CO2-rich electrolysis gas atmospheres has been scarcely studied. In this work, the corrosion stability of a low-activity FeAl aluminide diffusion coated 316 L stainless steel has been tested in a ternary carbonate eutectic mixture Li2CO3-Na2CO3-K2CO3 by 48 h-immersion tests at 500 °C under CO2 atmosphere. Before the corrosion testing, the coated steel samples were pre-oxidized in air at 750 °C in order to generate a protective thin alumina film on the aluminide coating surface. The salt immersion results indicate that FeAl aluminide coatings are not stable in acid molten carbonate environments due to rapid transformation of the pre-existing alumina film into a non-protective mixed Fe-Al oxide crystalline layer. Corrosion degradation has been found to consist of both general and localized forms of attack. Factors affecting FeAl aluminide coating corrosion have been analyzed and discussed in detail.
“Effect of Al Enrichment by Pack Cementation of FeCr Coatings Deposited by HVOF” Journal of Thermal Spray Technology 24 (2015) 244 – 251
A great contribution to CO2 emissions comes from coal fired power generation. Combination of carbon capture sequestering technologies with sustainable biomass conversion constitutes a decisive boost in limiting rise in global temperature. Co-firing alternative materials with pulverized coal and using oxy-fuel combustion conditions (oxy-fuel co-combustion) is a very attractive process for power industry. Materials with both high mechanical properties and high environmental resistance are required by such advanced combustion systems. One approach to improve high-temperature oxidation/corrosion resistance is to apply protective coatings. In the present work, low and high Cr content Fe-based alloys have been deposited in order to investigate the influence of Cr content on coating protective performance in oxy-fuel co-combustion conditions. Grade 91 steel has been assumed as reference substrate. Effect of Al enrichment on coating environmental resistance has also been analyzed. Activities have been performed within the framework of Macplus Project (Integrated Project co-founded by the European Commission under the 7th Framework Program in the Energy area).
“High temperature oxidation of MCrAlY coatings modified by Al2O3 PVD overlay” Surface and Coating Technologies 268 (2015) 198 – 204
In this study the high temperature oxidation behavior of NiCoCrAlTaY coatings modified by a PVD (physical vapor deposition) surface treatment was evaluated: the coatings, produced by HVOF (high velocity oxygen fuel) technique, were protected by an Al2O3 PVD sputtered overlay prior to top coating with an YSZ ceramic layer, and were exposed in air at 1100 C up to 400 h. The oxidation kinetics were evaluated by measuring the thickness of the TGO (thermally grown oxide) scale at several exposure times and the microstructural evolution induced by the heat treatments was investigated. The effect of the presence of the Al2O3 PVD overlay, in terms of microstructure and oxidation resistance, was assessed by comparing the performance of modified TBCs with unprotected NiCoCrAlTaY systems. Experimental evidence was gathered showing that the presence of an Al2O3 PVD overlay enhances the oxidation resistance of NiCoCrAlTaY coatings and promotes the adhesion between bond and top coat. A thermo-mechanical finite element model of the modified TBC system was also developed: the growth of the oxide scale was modeled and the previously assessed oxidation kinetics were implemented in order to estimate the effects of the PVD film on the mechanical stress field of the TBC system.
“High Temperature Oxidation and Microstructural Evolution of Modified MCrAlY Coatings” Metallurgical and Materials Transactions A 45 (2014) 1401 – 1408
Thermal sprayed MCrAlY coatings are widely used as a bond coat in thermal barrier systems to protect the substrate from corrosion and high temperature oxidation and to improve the compatibility between the ceramic top coat and metallic substrate. In this paper, the high temperature oxidation resistance of MCrAlY coatings with modified compositions was evaluated; in particular, the effect of the addition of reactive and refractory elements (Ta, Re, Si, and Hf) was investigated. MCrAlY coatings were obtained by high velocity oxygen fuel spray and vacuum plasma spray techniques; samples were exposed to air at 1423 K (1150 °C) and the oxidation kinetics were evaluated by measuring the thickness of the thermally grown oxide (TGO) scale at several exposure times. Experimental data confirmed that the oxidation resistance of MCrAlY coatings is strictly related to the amount of the reactive and refractory elements in the starting powders and that a thorough understanding of the microstructural modifications taking place during oxidation is essential for controlling TGO growth and thermal barriers durability.
"Indium tin oxide coatings properties as a function of the deposition atmosphere" Thin Solid Films, 520 (2012) 4041-4045
Indium tin oxide coatings were deposited by magnetron sputtering physical vapour deposition under different atmospheres. Microstructural, electrical, and optical properties were measured, finding a correlation among properties and process parameters. Texture analyses carried out by X-ray diffraction showed that films microstructure depended by the oxygen content in the deposition vessel: high values of the oxygen content (e.g., 5%) caused the film to grow along the <111> orientation; under pure Ar, the grains grew along the <100> orientation. Intermediate values of the oxygen content caused the growth of two families of grains, respectively oriented along the <111> and the <100> directions.
"Innovative AlNiIr alloy for bond coats:Microstructure, phase analysis and oxidation behaviour" Intermetallics 22 (2012) 241-250
Iridium modified nickel alluminides are considered promising bond coats due to the capability to promote α-Al2O3 scale growth and to develop the formation of Ir layer acting as oxygen diffusion barrier (ODB). An innovative Al–Ni–Ir alloy (Al 60 %at, Ni 35 %at, Ir 5 %at) was formulated, taking into account the bond coat appropriate requirements and the cost standpoint. A detailed and systematic microstructural investigation of both powder and bulk samples was reported, comparing the phase composition, thermal stability and oxidation behaviour of the proposed system with respect to the Ir free one. The analysed AlNiIr system was composed of Al3Ni2 and AlNi3, in addition to the β-NiAl, detected in the reference one. The Ir presence seemed to promote the alumina scale growth, starting at around 1000 °C. Both as cast and oxidised AlNiIr bulk samples showed Ni-poor and Al-rich islands, in which Ir resulted more concentrated, suggesting an iridium higher affinity towards Al with respect to Ni. After the oxidation at operative temperature (i.e. 1150 °C), the α-Al2O3 scale growth was observed, increasing the thickness with the dwelling time. Neither Ir ODB nor Ir rich islands at the interface between the alloy and the Al2O3 scale were identified, due to the low Ir amount. However the presence of metallic Ir and of the compound Al2.75Ir was detected in the powder after thermal treatment at 1000 °C.
“A multiscale numerical homogenization-based method for the prediction of elastic properties of components produced with the fused deposition modelling process” Results in Engineering Volume 14, June 2022.
“Development of a surface response methodology for assessing the cleanability of stainless steel in food industry (POSTER)” 3rd International Conference on Applied Surface Science 17-20 June 2019 | Pisa Congress Palace, Pisa, Italy
Tribo-corrosion behaviour of chromium carbide based coatings deposited by HVOF. Surface & Coatings Technology 268 (2015) 247-251
"Effect of Al Enrichment by Pack Cementation of FeCr Coatings Deposited by HVOF" Journal of Thermal Spray Technology 24 (2015) 244 – 251
"A hybrid approach to the development of a multilayer neural network for wear and fatigue prediction in metal forming" Tribology International, Volume 40, Issues 10-12, October-December 2007, Pages 1705-1717
"Study of contact fatigue phenomena influence on back-up rolls rolling campaign duration and grinding operations" AISTech 2011 and 18th International Forgemasters Meeting
“A new one-DoF fully parallel mechanism for modelling passive motion at the human tibiotalar joint" Journal of Biomechanics, 22;42(10):1403-8.
“A three-step procedure for the modelling of human diarthrodial joints”. International Journal of Mechanics and Control, 10(1), pp. 3 – 12.
”A one-degree-of-freedom spherical wrist for the modelling of passive motion of the human ankle joint”. In Proceedings of IAK 2008, Conference on Interdisciplinary Applications of Kinematics, A. Kecskemethy (eds.), 9–11 January 2008, Lima, Peru.
“New spatial mechanisms for the kinematic analysis of the tibiotalar joint.”, In Proceedings of i-FAB 2008, International Foot and Ankle Biomechanics Community, p. 1.
“A 5-5 one degree of freedom fully-parallel mechanism for the modelling of passive motion at the human ankle joint”, ASME-IDETC/CIE 2007, ASME International Design Engineering Technical Conferences & Computers and Information in Engineering Conference, September 4-7, 2007, Las Vegas, Nevada, USA.
“Potentiality of a new code to study ligament-bone interactions in human joints”, Journal of Biomechanics Vol.40, Suppl.2 2007 (XXI Congress of the International Society of Biomechanics, 1-5th July 2007, Taipei, Taiwan) pp. S580
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Obblighi informativi per le erogazioni pubbliche: gli aiuti di Stato e gli aiuti de minimis ricevuti dalla nostra impresa sono contenuti nel Registro nazionale degli aiuti di Stato di cui all’art. 52 della L. 234/2012 a cui si rinvia e consultabili al seguente link