Comparison of the tribological behavior of HVOF sprayed Stellite 6 and Stellite 6 composite coatings under high temperature sliding conditions

Wednesday, May 26, 2021: 10:00 AM
Ms. Alejandra Islas Encalada , McGill University, Montreal, QC, Canada
Dr. Sima A. Alidokht , McGill University, Montreal, QC, Canada
Dr. Navid Sharifi , Concordia University, Montreal, QC, Canada
Mr. Bruno C. N. M. de Castilho , McGill University, Montreal, QC, Canada
Dr. Pantcho Stoyanov , Concordia University, Montreal, QC, Canada
Ms. Kelly Harrington , Pratt & Whitney, East Hartford, CT
Prof. Christian Moreau , Concordia University, Montreal, QC, Canada
Prof. Richard R. Chromik , McGill University, Montreal, QC, Canada
Stellite 6 is used for wear, corrosion and high temperature resistance applications, where at high temperatures the good wear resistance is due to the formation of a compacted oxide layer. Coatings of Stellite 6 and composites with a 25% Stellite 6 and 75% Cr3C2 were sprayed using High Velocity Oxygen Fuel (HVOF) technology. Microstructure and phase analysis were performed on both coatings and powders using scanning electron microscopy, equipped with an energy dispersive spectroscopy. Wear testing and indentation testing were performed for both Stellite 6 and composite coatings at room temperature, 200°C and 350°C. A comparison of the tribological performance, tribofilm formation, as well as mechanical properties were performed to evaluate the effect of a hard phase (Cr3C2) on the metal coating.
See more of: Wear, Corrosion and Tribology I-b
See more of: Thermal Spray Applications