热喷涂NiCrFeAl/BN-YSZ复合涂层摩擦磨损性能研究

Study on the Friction and Wear Properties of Thermal Sprayed NiCrFeAl/BN-YSZ Composite Coatings

采用火焰喷涂和等离子喷涂在钛合金(TC11)上进行复合涂层制备,表征涂层的表面硬度、微观组织形貌和不同温度下的磨损性能。结果表明:复合涂层室温时表面硬度为54.9 HR15Y,在600℃保温不同时间后表面硬度变化很小,组织稳定,涂层各界面之间结合状态良好。室温时磨损率为0.00067 mm^(3)/(N·m),600℃时磨损率为0.00268 mm^(3)/(N·m),磨损机制也从磨粒磨损向黏着磨损机制转变,并以黏着磨损为主,且伴随着部分的氧化磨损、塑形变形以及磨粒磨损。

Composite coatings were prepared on titanium alloy(TC11)by flame spraying and plasma spraying to characterize the surface hardness,microstructure morphology,and wear performance at different temperatures.The results show that the surface hardness of the composite coating is 54.9 HR15Y at room temperature,and the surface hardness changes very little after holding at 600℃ for different times.The structure is stable,and the bonding state between the various interfaces of the coating is good.At room temperature,the wear rate is 0.00067 mm^(3)/(N·m),and at 600℃,the wear rate is 0.00268m^(3)/(N·m).The wear mechanism has also shifted from abrasive wear to adhesive wear,with adhesive wear being the main type,accompanied by partial oxidation wear,plastic deformation,and abrasive wear.