Tribochemical Reactions in Metal-on-Metal Hip Joints Influence Wear and Corrosion
Tribochemical Reactions in Metal-on-Metal Hip Joints Influence Wear and Corrosion
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金属对金属髋关节中的摩擦化学反应影响磨损和腐蚀
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
J. Jacobs
中科院分区：
文献类型：
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作者：
M. Wimmer;M. Mathew;M. Laurent;C. Nagelli;Y. Liao;L. Marks;R. Pourzal;A. Fischer;J. Jacobs
最近的发现表明，在金属对金属(MOM)轴承表面存在摩擦化学生成的层。这些摩擦层是几百纳米厚的薄膜，由碳质材料与金属和氧化物颗粒混合组成。研究的目的是从机械和电化学的角度对这些摩擦膜进行表征。利用纳米压痕仪测量了摩擦层的局部力学性能。平均测定的硬度为1.0 Gpa，比下面的金属要软。研究了摩擦材料对钴铬钼合金(CoCrMo)电化学性能的影响。以小牛血清混合物为电解液。用动电位法比较了高碳和低碳CoCrMo-有没有摩擦层的样品。在这项腐蚀性调查之后，使用定制的仪器进行了摩擦腐蚀测试，其中一份陶瓷球手稿于2012年5月23日收到；2012年9月5日接受出版；2013年4月10日在线出版。部门拉什大学整形外科学院。美国伊利诺伊州芝加哥，伊利诺伊州60612，整形外科大楼医疗中心，1611W.哈里森大街，204室，邮编：60612(通讯作者)，电子邮件：markus_a_wimmer@rush.edu拉什大学整形外科学院。医疗中心，芝加哥，伊利诺伊州60612，美利坚合众国。部门材料科学与工程学院，西北大学，伊利诺伊州埃文斯顿，60201，美利坚合众国。材料科学与工程学院。杜伊斯堡-埃森，47057，德国杜伊斯堡。VC2013版权所有：ASTM International，100Barr Harbor Drive，邮政信箱C700，West Conhohocken，PA 19428-2959。金属对金属全髋关节置换设备STP1560,2013年可在www.astm.orgDOI：10.1520/STP156020120050上在线购买，在平坦的钴铬钼表面上振荡。在100K循环试验过程中，监测了电势和摩擦系数。测试前后进行了电化学阻抗谱测试。体重损失通过平面分析来确定。结果表明，摩擦层表面比无摩擦层(抛光)表面具有更好的耐腐蚀性。在摩擦磨损试验中，摩擦层表面也显示出更高的潜力，磨损更少。在所有表面条件下，高碳是比低碳更好的合金；然而，在摩擦膜存在的情况下，差异似乎是相等的。两种合金的摩擦膜生成也存在差异，可能与两种合金的微观结构有关。
Recent findings indicate the presence of tribochemically generated layers on metal-on-metal (MoM) bearing surfaces. These tribolayers are films of a few-hundred-nanometer thickness and are constituted of carbonaceous material mixed with metal and oxide particles. The purpose of the study was to characterize these tribofilms mechanically and electrochemically. Using a nanoindenter, the local mechanical properties of the tribolayer were measured. On average a hardness of 1.0 GPa was determined, which was softer than the underlying metal. The influence of tribomaterial on the electrochemistry of the cobalt–chromium–molybdenum alloy (CoCrMo) was investigated. Bovine calf serum mixture was used as the electrolyte. Highand low-carbon CoCrMo-samples with and without tribolayer were compared using potentiodynamic testing. This corrosive investigation was followed by tribocorrosive tests using a custom made apparatus, where a ceramic ball Manuscript received May 23, 2012; accepted for publication September 5, 2012; published online April 10, 2013. Dept. of Orthopedic Surgery, Rush Univ. Medical Center, Orthopedic Building, 1611 W. Harrison St., Suite 204, Chicago, IL 60612, United States of America (Corresponding author), e-mail: markus_a_wimmer@rush.edu Dept. of Orthopedic Surgery, Rush Univ. Medical Center, Chicago, IL 60612, United States of America. Dept. of Materials Science and Engineering, Northwestern Univ., Evanston, IL 60201, United States of America. Materials Science and Engineering, Univ. of Duisburg-Essen, 47057 Duisburg, Germany. Copyright VC 2013 by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. Metal-On-Metal Total Hip Replacement Devices STP 1560, 2013 Available online at www.astm.org DOI:10.1520/STP156020120050 oscillated against a flat CoCrMo surface. Potential and coefficient of friction were monitored throughout this 100 K cycle test. Electrochemical impedance spectroscopy tests before and after testing were conducted. Weight loss was determined using planimetric analysis. It was found that the tribolayered surface had better corrosion resistance than the corresponding tribolayer-free (polished) surface. The tribolayered surface also exhibited a more noble potential during tribocorrosive testing and demonstrated less wear. Highcarbon was the superior alloy compared with low carbon for all surface conditions; however, the differences seemed to equalize in the presence of a tribofilm. There were also differences in tribofilm generation, possibly related to the microstructure of the two alloys.
影响因子：
14
作者：
WILLIAMS, RL;BROWN, SA;MERRITT, K
通讯作者：
MERRITT, K