摘要
为了提高钛合金表面微弧氧化膜的减摩耐磨性能,在硅酸盐溶液中,对Ti6Al4V钛合金进行微弧氧化处理,采用聚四氟乙烯(PTFE)对微弧氧化膜进行封孔处理后对其进行高温固化,制备了具有自润滑和高耐磨性的微弧氧化-PTFE自润滑膜。采用扫描电镜观察了自润滑膜的表面形貌;采用摩擦磨损试验机研究了其耐磨性能;采用极化曲线研究了其耐腐蚀性能。结果表明:PTFE颗粒已进入微弧氧化膜中,自润滑膜的摩擦系数低至0.15左右,自腐蚀电位较基体大幅正移,腐蚀电流密度大幅降低,自润滑膜的耐磨性能及耐蚀性能均较基体及微弧氧化膜大幅提升。
For the purpose of improving the wear resistance and corrosion resistance of Ti alloy,Ti6Al4V Ti alloy was micro-arc oxidized in sodium silicate solution. Resultant micro-arc oxidation film was then sealed with polytetrafluroethylene( PTFE) via curing at elevated temperature to afford micro-arc oxidation / PTFE composite self-lubricating film possessing good wear resistance.The surface morphology of as-prepared micro-arc oxidation / PTFE composite self-lubricating film was observed with a scanning electron microscope,and its wear resistance was evaluated with friction and wear tester. Moreover,the corrosion resistance of the composite self-lubricating film was evaluated based on measurement of polarization curve. Results indicated that PTFE particulates were embedded in the pores of the micro-arc oxidation film thereby reducing the friction coefficient of the composite self-lubricating film to about 0. 15. In the meantime,as compared with Ti alloy substrate,as-prepared composite self-lubricating film had significantly positively shifted corrosion potential,greatly reduced corrosion current density, as well as considerably improved wear resistance and corrosion resistance.
出处
《材料保护》
CAS
CSCD
北大核心
2014年第1期8-10,7,共3页
Materials Protection
