通过O+离子注入提高超高分子量聚乙烯的耐磨性

[Improve wear resistance of UHMWPE by O+ ion implanted].

作者信息

Xiong Dangsheng

机构信息

Department of Material Science & Engineering, Nanjing University of Science and Technology, Nanjing 210094.

出版信息

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi. 2003 Dec;20(4):583-5, 596.

PMID:14716850

Abstract

Ultra high molecular weight polyethylene (UHMWPE) was implanted with 450 keV and 100 keV O+ ions at dosage of 1 x 10(15)/cm2, 5 x 10(15)/cm2, 3 x 10(14)/cm2, respectively. Its wear behaviors were studied under dry friction condition and lubrication by means of distilled water using a pin-on-disk tribometer with a Si3N4 ceramic ball as a counterface. The wear surfaces were examined with SEM. The experimental results showed that the wear rate of implanted UHMWPE is lower than that of un-implanted UHMWPE under both dry and distilled friction conditions, especially for 450 keV energy and 5 x 10(15)/cm2 dose implantation. The friction coefficient of O+ ions implanted UHMWPE is higher than that of un-implanted UHMWPE under both dry and distilled friction conditions. The adhesive, plow and plastic deformation are the wearing mechanism for un-implanted UHMWPE; the fatigue and abrasive wear are that for implanted UHMWPE.

摘要

分别以450千电子伏特和100千电子伏特的氧离子，在剂量为1×10¹⁵/cm²、5×10¹⁵/cm²、3×10¹⁴/cm²的条件下对超高分子量聚乙烯（UHMWPE）进行注入。使用以Si₃N₄陶瓷球为对偶面的销盘式摩擦磨损试验机，研究其在干摩擦条件和蒸馏水润滑条件下的磨损行为。用扫描电子显微镜（SEM）检查磨损表面。实验结果表明，在干摩擦和蒸馏水摩擦条件下，注入后的UHMWPE的磨损率均低于未注入的UHMWPE，特别是对于450千电子伏特能量和5×10¹⁵/cm²剂量的注入情况。在干摩擦和蒸馏水摩擦条件下，氧离子注入的UHMWPE的摩擦系数均高于未注入的UHMWPE。未注入的UHMWPE的磨损机制为粘着、犁削和塑性变形；注入后的UHMWPE的磨损机制为疲劳和磨粒磨损。