为了提高钛合金微弧氧化膜的耐磨性,向电解液中加入ZrO2微粒,在TC4钛合金表面制备了不同ZrO2含量的微弧氧化复合膜.采用涡流测厚仪测量复合膜的厚度;采用扫描电镜分析复合膜形貌;采用X射线衍射仪分析复合膜相组成;采用能谱仪分析复合膜中ZrO2的含量;采用摩擦磨损试验研究复合膜在室温条件下的摩擦磨损性能.结果表明:复合膜中出现的ZrO2新相降低了氧化膜的摩擦系数和磨损率;当复合膜中ZrO2含量依次为2.70％,9.20％,14.09％,23.59％,42.78％时,平均摩擦系数先减小后增大,分别为0.45,0.40,0.30,0.26,0.35,比磨损率先减小后增大,分别为8.35×10-7,7.26×10-7,6.92×10-7,2.70×10-7,3.01×10-7 mm3/(N·m);当复合膜中ZrO2含量为23.59％时,复合膜摩擦系数最小,最稳定,比磨损率最小;随着ZrO2在复合膜中含量的提高,ZrO2载荷转移和自润滑作用增强,摩擦系数和比磨损率减小,但当ZrO2含量增加至42.78％时,ZrO2在复合膜表面团聚,使磨粒磨损和黏着磨损加剧,复合膜的摩擦磨损性能降低.
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