分离提取了炭/炭复合材料在髋关节模拟试验机中形成的磨损颗粒.采用激光粒度仪考察了磨损颗粒的尺寸分布,借助扫描电镜分析了磨损颗粒的形貌特征,采用三维轮廓仪检测了磨损颗粒的厚度规律.结果表明,炭/炭复合材料磨损颗粒的尺寸分布在0.3～93.9μm之间,其形貌和厚度依据颗粒尺寸呈现规律性的分布,大尺寸(>30μm)颗粒基本是破损的碳纤维,厚度稳定;中尺寸(3～30μm)颗粒的外形不规则,边界轮廓复杂,厚度分布范围广泛;小尺寸(<3μm)颗粒呈现圆片形或球形,厚度分布在亚微米级别.同时根据实验结果,揭示了炭/炭复合材料磨损颗粒在磨擦过程中的演变过程.
The carbon/carbon composite wear particles generated from a hip joint simulator were separated.The size, morphology and thickness of the particles were tested by laser particle size analyzer, scanning elec-tron microscope and 3-D profiler, respectively. The results show that the particles are 0.3-93.9μm in size and the morphology and the thickness of the particles distributes regularly according to their sizes. The parti-cles whose sizes are larger than 30μm are carbon fibers with a constant thickness. The particles whose thick-nesses are in a broad range with medium size (3-30μm) show irregular morphology and complex boundary.The particles whose thicknesses are in the range of sub-micrometers are less than 3μm in size and have a spherical or circular shape. Based on the experimental results, the evolvement of the wear particles in the wear process is explained.
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