采用热压成型工艺制备了超高分子量聚乙烯(UHMWPE)/珊瑚羟基磷灰石(CHA)复合关节材料,利用人工髋关节模拟磨损试验系统,研究了该类复合材料与CoCrMo合金组合关节在小牛关节液润滑条件下的摩擦磨损性能.实验结果表明,添加CHA能有效提高UHMWPE关节材料的表面硬度,降低其磨损率.当CHA添加量为20 wt%时,可获得表面硬度与抗磨损性能的良好匹配.小牛关节液润滑条件下,UHMWPE及其复合材料的磨损机理主要表现为研磨磨损和疲劳磨损,磨损颗粒尺寸随CHA粉体添加量的增加而增大.
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