为了研究ZrO2增强羟基磷灰石(HA)复合涂层在牛血清润滑环境下的摩擦磨损性能,首先,采用等离子喷涂技术在钛合金基体上制备了ZrO2含量分别为0、15wt％和30wt％的HA生物陶瓷涂层;然后,分析了ZrO2/HA复合涂层的物相成分和结合强度;最后,采用UMT-3销盘摩擦试验机研究了ZrO2/HA复合涂层在牛血清润滑环境下的摩擦磨损性能,观察涂层磨损表面微观形貌并分析了磨损机制.结果表明:HA涂层的主要物相为HA,15wt％ ZrO2/HA复合涂层和30wt％ZrO2/HA复合涂层中的ZrO2以立方相形式存在,并且衍射峰强度高于HA的.随着ZrO2含量增大,涂层的结合强度明显增大.ZrO2/HA复合涂层与纯HA涂层相比,有更好的耐磨性和更低的摩擦系数.纯HA涂层的磨损机制以犁沟效应和磨粒磨损为主,而15wt％ ZrO2/HA复合涂层和30wt％ ZrO2/HA复合涂层的磨损机制为脆性剥落磨损.
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