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首页> 外文期刊>Journal of Materials Engineering and Performance >Study on Tribological Properties of CoCrMo Alloys against Metals and Ceramics as Bearing Materials for Artificial Cervical Disc
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Study on Tribological Properties of CoCrMo Alloys against Metals and Ceramics as Bearing Materials for Artificial Cervical Disc

机译：金属和陶瓷COCRMO合金的摩擦学特性研究人工宫颈椎间盘轴承材料

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CoCrMo alloys are believed to be a kind of potential material for artificial cervical disc. However, the tribological properties of CoCrMo alloys against different metals and ceramics are not systematically studied. In this study, the tribological behaviors of CoCrMo alloys against metals (316L, Ti6Al4V) and ceramics (Si3N4, ZrO2) were focused under dry friction and 25 wt.% newborn calf serum (NCS)-lubricated conditions using a ball-on-disc apparatus under reciprocating motion. The microstructure, composition and hardness of CoCrMo alloys were characterized using x-ray diffraction, scanning electron microscopy (SEM) and hardness testers, respectively. The contact angles of the CoCrMo alloys with deionized water and 25 wt.% NCS were measured by the OCA contact angle measuring instrument. The maximum wear width, wear depth and wear volume were measured by three-dimensional white light interference. The morphology and the EDX analysis of the wear marks on CoCrMo alloys were examined by SEM to determine the basic mechanism of friction and wear. The dominant wear mechanism in dry friction for CoCrMo alloys against all pairings was severe abrasive wear, accompanied with a lot of material transfer. Under 25 wt.% NCS-lubricated condition, the wear mechanism for CoCrMo alloys against ceramics (Si3N4, ZrO2) was also mainly severe abrasive wear. However, severe abrasive wear and electrochemical corrosion occurred for the CoCrMo-316L pairing under lubrication. Severe abrasive wear, adhesive wear and electrochemical corrosion occurred for the CoCrMo-Ti6Al4V pairing under lubrication. According to the results, the tribological properties of CoCrMo alloys against ceramics were better than those against metals. The CoCrMo-ZrO2 pairing displayed the best tribological behaviors and could be taken as a potential candidate bearing material for artificial cervical disc.
机译：COCRMO合金被认为是人造宫颈椎间盘的一种潜在材料。然而，不系统地研究了Cocrmo合金对不同金属和陶瓷的摩擦学性质。在本研究中，CoCrMo合金对金属（316L，Ti6Al4V）和陶瓷（Si3N4，ZrO2）的摩擦学行为聚焦在干摩擦下，25重量％的新生小牛血清（NCS） - 润滑条件使用球形圆盘往复运动下的装置。 COCRMO合金的微观结构，组成和硬度分别使用X射线衍射，扫描电子显微镜（SEM）和硬度测试仪表征。通过OCA接触角测量仪测量COCRMO合金的COCRMO合金的接触角和25重量％的NC。通过三维白光干扰测量最大磨损宽度，磨损深度和磨损体积。 CoCroMo合金磨损标记的形态和EDX分析被SEM检查了摩擦和磨损的基本机制。对所有配对的CocroMo合金的干式摩擦中的主导磨损机制严重磨料磨损，伴随着大量的材料转移。低于25重量％。％NCS-润滑条件，COCRMO合金对陶瓷的磨损机制（Si3N4，ZrO2）也主要是严重的研磨磨损。然而，在润滑下COCRMO-316L配对发生严重的研磨磨损和电化学腐蚀。润滑下COCRMO-TI6AL4V配对发生严重的研磨磨损，粘接磨损和电化学腐蚀。根据结果​​，CocrMo合金对陶瓷的摩擦学性质优于抗金属。 COCRMO-ZRO2配对显示了最佳的摩擦学行为，可以作为人造颈椎间盘的潜在候选材料。

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