引用本文:张鑫， 陈辉， 陈凯.锻造CoCrMo合金关节材料的滑动摩擦腐蚀行为[J].中国表面工程,2016,29(2):43~48
ZHANG Xin, CHEN Hui, CHEN Kai.Sliding Tribocorrosion Behavior of Forged CoCrMo Alloy for Artificial Joint Materials[J].China Surface Engineering,2016,29(2):43~48
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锻造CoCrMo合金关节材料的滑动摩擦腐蚀行为
张鑫， 陈辉， 陈凯
中国矿业大学 材料科学与工程学院
摘要:
采用UMT2多功能摩擦磨损试验机和电化学工作站（CHI614E）摩擦腐蚀试验平台，考察了医用CoCrMo合金在生理盐水润滑条件下的摩擦腐蚀行为，利用扫描电镜观察了CoCrMo合金在摩擦腐蚀之后的形貌特征。结果表明，随着载荷的增大，CoCrMo合金摩擦腐蚀后的腐蚀电位降低，腐蚀电流增大。摩擦腐蚀的摩擦因数均大于纯摩擦因数，且随载荷的增加而减小。摩擦腐蚀的磨损破坏比纯摩擦严重，磨损机理主要表现为犁沟磨损和剪切塑变造成的局部剥落。
关键词:  CoCrMo合金  摩擦腐蚀  关节材料  生理盐水
DOI：10.11933/j.issn.1007-9289.2016.02.007
分类号:
基金项目:
Sliding Tribocorrosion Behavior of Forged CoCrMo Alloy for Artificial Joint Materials
ZHANG Xin, CHEN Hui, CHEN Kai
School of Material Science and Engineering, China University of Mining and Technology
Abstract:
The tribocorrosion behavior of CoCrMo alloy in physiological saline solution was investigated by UMT2 multifunctional wear tester and electrochemical workstation (CHI614E). The morphology of CoCrMo alloy was analyzed by scanning electron microscopy after tribocorrosion. The results show that the corrosion potential of CoCrMoalloy decreases, however, the corrosion current increases with the increase of applied loads. Under different applied load conditions, the friction coefficients of tribocorrosion are higher than the pure friction coefficients. With the increase of applied loads, the friction coefficients of tribocorrosion decrease.The wear surface damage of tribocorrosion is more serious than the pure friction. The main wear mechanism is ploughing wear and local spalling caused by the shear deformation.
Key words:  CoCrMo alloy  tribocorrosion  artificial joint material  physiological saline
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