Wear Behaviors of Fe-based Metallic Glass Sprayed Coatings by High Velocity Oxy-Fuel Spraying Process on Aluminum Alloy Substrate

Abstract

Formation of Fe₄₃Cr₁₆Mo₁₆C₁₄B₁₀ metallic glass phase on the aluminum alloy substrate has bean a high velocity oxy-fuel (HVOF). Fe-based metallic glass sprayed coating with the thickness of about 200∼250μm has been successfully formed on the A5052 aluminum alloy substrate with good adhesion by HVOF spraying process. Sprayed coating with the amorphous state exhibited high hardness with Vickers Micro hardness of HV 913-1120 and low wears loss, but comparably high friction coefficient of 0.7 to 0.8 evaluated by a ball-on-disc wear test under dry condition. However, friction coefficient of the Fe-based metallic glass sprayed coating can be improved to 0.07μ by using engine oil as a lubricant.