(江苏大学 先进制造与现代装备技术工程研究院，镇江 212013)
摘 要: 研究微弧氧化-水热处理对常规TiNi合金和超细晶TiNi合金表面形貌、膜-基结合力和抗微动摩擦磨损性能的影响。结果表明：与常规TiNi合金微弧氧化涂层相比，超细晶TiNi合金微弧氧化涂层表面具有较高的n(Ca)/n(P)(0.85)、较低的摩擦因数(0.027)、较高的膜基结合力(10 N)、较高的抗微动摩擦磨损性(磨痕宽度0.27 mm)；在经过48 h的水热处理后，超细晶TiNi合金微弧氧化涂层表面具有较高的n(Ca)/n(P)(1.79)，接近标准HA的n(Ca)/n(P)(1.67)；TiNi合金的组织超细化能大幅度提高TiNi合金微弧氧化-水热处理涂层表面的抗微动摩擦磨损性和表面活性。
关键字: 超细晶TiNi合金；微弧氧化；水热处理；表面形貌；微动摩擦；磨损；膜-基结合力
（Engineering Institute of Advanced Manufacturing and Modern Equipment Technology,
Jiangsu University, Zhenjiang 212013, China）
Abstract:The surface morphology, adhesion of film and substrate, fretting friction and wear properties and bioactivity of conventional TiNi alloy and ultrafine-grained TiNi alloy treated by micro-arc oxidation and heat-treatment were investigated. The results show that, compared with the conventional TiNi alloy, the mircro-arc oxidiation coating surfaces of ultrafine-grained TiNi alloy have higher surface activity (the n(Ca)/n(P) is 0.85), lower friction coefficient (0.027) with higher fretting wear resistance, narrower wear scar width (0.27 mm), better adhesion of film-substrate adhesion (10 N) and much higher surface activity with the n(Ca)/n(P)(1.79) (which is closer to the standard n(Ca)/n(P) of HA (1.67)) after heat-treatment for 48 h. The present results illustrate that the ultrafinement processing of microstructure is an effective way to improve fretting wear resistance and bioactivity.
Key words: ultrafine-grained TiNi alloy; micro-arc oxidation; hydrothermal treatment; surface morphology; fretting friction; wear; film-substrate adhesion
