Tribo-corrosion mechanisms and electromechanical behaviours for metal implants materials of CoCrMo, Ti6Al4V and Ti15Mo alloys

IF 1.6 Q4 ENGINEERING, BIOMEDICAL
Hongxiang Wang, Jingjing Zheng, Xiaolei Sun, Yong Luo
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引用次数: 3

Abstract

Corrosion and wear play significant roles in the aseptic loosening of artificial hip joints for the long-term service. In this present study, tribo-corrosion tests were carried out through a reciprocating ball-on-plate system to evaluate the corrosion and wear properties of CoCrMo, Ti6Al4V and Ti15Mo alloys in a simulated body fluid (SBF) solution. It was found that the tribo-corrosion behaviours of CoCrMo/Al2O3 and Ti15Mo/Al2O3 systems had significant wear-corrosion synergistic interaction, and wear-induced corrosion was dominant. For Ti6Al4V/Al2O3 systems, their wear mechanism under SBF lubrication was a combination of abrasive, adhesive and fatigue wear. While the wear mechanism of the Ti15Mo/Al2O3 system under synergistic interaction was a combination of abrasive and adhesive wear. Finally, it was suggested that the Ti15Mo alloy would be the better alternative for metal implant applications compared with the CoCrMo alloy for the consideration of both wear and potential poisonous ions such as Co(III) and Cr(VI).

Abstract Image

CoCrMo、Ti6Al4V和Ti15Mo合金金属植入材料的摩擦学机制和机电性能
腐蚀和磨损在人工髋关节无菌松动中起着重要的作用。在本研究中,通过往复球-板系统进行了摩擦腐蚀试验,以评估CoCrMo, Ti6Al4V和Ti15Mo合金在模拟体液(SBF)溶液中的腐蚀和磨损性能。结果表明:CoCrMo/Al2O3体系和Ti15Mo/Al2O3体系的摩擦腐蚀行为具有显著的磨损-腐蚀协同作用,以磨损腐蚀为主;对于Ti6Al4V/Al2O3体系,SBF润滑下的磨损机制为磨粒磨损、黏着磨损和疲劳磨损的结合。而Ti15Mo/Al2O3体系在协同作用下的磨损机制为磨粒磨损和粘着磨损的结合。最后,考虑到磨损和潜在的有毒离子如Co(III)和Cr(VI),建议与CoCrMo合金相比,Ti15Mo合金将是金属种植体应用的更好选择。
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来源期刊
Biosurface and Biotribology
Biosurface and Biotribology Engineering-Mechanical Engineering
CiteScore
1.70
自引率
0.00%
发文量
27
审稿时长
11 weeks
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