钛表面阴极微弧沉积氧化铝涂层的组织结构及其性能研究  

Microstructure and Properties of Alumina Coating Deposited on Titanium by Cathodic Microarc Method

作　　者：金乾[1] 薛文斌[1] 李夕金[1] 朱庆振[1] 吴晓玲[1] 

机构地区：[1]北京师范大学核科学与技术学院射线束技术与材料改性教育部重点实验室,北京100875

出　　处：《航空材料学报》2009年第3期61-65,共5页Journal of Aeronautical Materials

基　　金：北京市教育委员会凝聚态物理共建项目(NoXK100270454);北京市科技新星计划(9558102500);教育部留学回国人员科研启动基金;北京市留学人员科技活动项目资助

摘　　要：以Al(NO3)3乙醇溶液为电解液,利用阴极微弧电沉积技术在纯钛表面制备了较厚的氧化铝涂层。分析了涂层的形貌、成分和相组成,测试了涂层的抗高温氧化、电化学腐蚀及抗热震性能,并探讨了阴极微弧沉积氧化铝涂层的机理。涂层由γ-Al2O3和少量的α-Al2O3组成。涂层中含有少量的钛元素,表明涂层/钛界面附近的钛基体在微弧放电作用下也参与氧化铝涂层的沉积和烧结过程。涂层经过100次(700℃水淬)热循环后仍与钛基体结合良好。700℃恒温氧化结果表明,具有氧化铝涂层的钛氧化速率降低了4倍。An alumina coating was prepared on titanium by cathodic microarc deposition in Al（ NO3 ）3 ethanol solution. The morphology, composition and phase constituent of the alumina coating were analyzed, and the oxidation behavior, thermal shock resistance and corrosion resistance were determined. Moreover, the mechanism of cathodic microarc deposition was also discussed. The coating is composed of γ-Al2O3 and little α-Al2O3 phases. The coating contains a little titanium element, which confirms that titanium substrate near the coating/titanium also takes part in the deposition and sintering process of coating under cathodic microarc discharge. After 100 times thermal cycling of 700 ℃ coated sample quenching into water, the coating still remains a good adhesion to titanium substrate. In addition, the oxidation rate of the coated titanium is reduced about 4 times under 700 ℃isothermal oxidation test.

关 键 词：阴极微弧沉积 钛 氧化铝涂层 性能 

分 类 号：TQ174.758[化学工程—陶瓷工业] TG174.453[化学工程—硅酸盐工业]