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通过微弧氧化法,在加入纳米TiO_2添加剂的硅酸盐电解液中,在ZL101A铸造铝合金基体上制备了含有TiO_2的陶瓷涂层。采用扫描电镜、X射线衍射仪、体视显微镜和摩擦磨损试验,研究了纳米添加剂浓度对该涂层摩擦性能的影响。结果表明,纳米添加剂进入到陶瓷涂层中,涂层表面变得更加致密。膜层硬度、厚度随添加剂浓度的增加而增加。同时,一定范围内,随纳米添加剂浓度的增加,磨损量逐渐较小,摩擦系数减小,添加剂浓度为20 g/L时制备的涂层具有最好的磨损性。
Through the micro-arc oxidation method, the ceramic coating containing TiO 2 was prepared on the ZL101A cast aluminum alloy substrate in the silicate electrolyte with nano-TiO 2 additive. The effects of nano-additive concentration on the tribological properties of the coating were investigated by scanning electron microscopy, X-ray diffraction, stereo microscope and friction and wear tests. The results show that nano-additives into the ceramic coating, the coating surface becomes more dense. Film hardness, thickness increases with the additive concentration. At the same time, with the increase of nano-additive concentration, the wear amount gradually decreases and the friction coefficient decreases with the increase of nano-additive concentration. The coating prepared with the additive concentration of 20 g / L has the best wear resistance.