材料科学
微观结构
涂层
摩擦学
陶瓷
复合数
锐钛矿
磨料
复合材料
金红石
钛合金
相(物质)
多孔性
钛
冶金
合金
化学工程
光催化
催化作用
工程类
有机化学
化学
生物化学
作者
Shuaixing Wang,Qing Zhao,Daoxin Liu,Nan Du
标识
DOI:10.1016/j.surfcoat.2015.03.044
摘要
Microarc oxidation (MAO) treatment of Ti6Al4V alloys in silicate electrolyte with Al2O3 microparticles resulted in a composite ceramic coating containing Al2O3. The microstructure, phase composition and high temperature tribological behavior of the composite coating were analyzed by SEM, EDS, XRD and ball-on-disc abrasive tests. The results revealed that the MAO coating formed in the absence of Al2O3 microparticles was porous, and mainly composed of rutile-TiO2, anatase-TiO2 and Al2TiO5 phase. In the composite ceramic coating, the surface porosity decreased significantly, and α-Al2O3 and more Al2TiO5 phase were identified. Compared to the MAO coating without Al2O3, the composite ceramic coating exhibited better wear resistance at 300 °C, as demonstrated by the lower friction coefficient, lower wear rate and mild wear spots. The enhancement of wear resistance at high temperature is attributed to the denser surface structure and higher fraction of Al2TiO5 phase.
科研通智能强力驱动
Strongly Powered by AbleSci AI