(江蘇大學 先進制造與現(xiàn)代裝備技術工程研究院，鎮(zhèn)江 212013)
摘 要: 研究微弧氧化-水熱處理對常規(guī)TiNi合金和超細晶TiNi合金表面形貌、膜-基結(jié)合力和抗微動摩擦磨損性能的影響。結(jié)果表明：與常規(guī)TiNi合金微弧氧化涂層相比，超細晶TiNi合金微弧氧化涂層表面具有較高的n(Ca)/n(P)(0.85)、較低的摩擦因數(shù)(0.027)、較高的膜基結(jié)合力(10 N)、較高的抗微動摩擦磨損性(磨痕寬度0.27 mm)；在經(jīng)過48 h的水熱處理后，超細晶TiNi合金微弧氧化涂層表面具有較高的n(Ca)/n(P)(1.79)，接近標準HA的n(Ca)/n(P)(1.67)；TiNi合金的組織超細化能大幅度提高TiNi合金微弧氧化-水熱處理涂層表面的抗微動摩擦磨損性和表面活性。
關鍵字: 超細晶TiNi合金；微弧氧化；水熱處理；表面形貌；微動摩擦；磨損；膜-基結(jié)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
