Wear mechanisms and particle generation in ultrahigh molecular weight polyethylene

J. Lankford, C. Blanchard, C. M. Agrawal
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引用次数: 2

Abstract

The effect of varying the initial surface roughness of ultrahigh molecular weight polyethylene (UHMWPE) tested in reciprocating wear against CoCr pins in bovine serum is investigated. It is found that wear occurs in two distinct stages that appear and disappear cyclically. The low wear phase corresponds to the development of surface deformation features that degenerate into a high amplitude wavelike topography. The features wear by fibrillar pullout and microfracture, producing submicrometer particulate debris.
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超高分子量聚乙烯的磨损机制和颗粒产生
研究了不同初始表面粗糙度对超高分子量聚乙烯(UHMWPE)与CoCr销在牛血清中往复磨损的影响。发现磨损发生在两个不同的阶段,周期性地出现和消失。低磨损阶段对应于表面变形特征的发展,并退化为高振幅的波浪形地形。其特点是纤维拉出和微断裂磨损,产生亚微米级颗粒碎片。
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