Abstract Ni-free Ti-based bulk metallic glasses (BMGs) with good mechanical properties, high corrosion resistance, and good biocompatibility are potential biomaterials. For the applications as load-bearing orthopedic implant materials, excellent wear resistance is required. In the present study, tribological behaviors of the Ni-free Ti47Cu38Zr7.5Fe2.5Sn2Si1Ag2 BMG in air and a phosphate buffer saline (PBS) solution were investigated and compared with Ti−6Al−4V and Co−28Cr−6Mo alloys. It was found that the wear resistance of the Ti-based BMG in air was superior to that of the Ti−6Al−4V alloy and paralleled with that of the Co−28Cr−6Mo alloy, mainly attributing to the high hardness of the Ti-based BMG. Under the dry-sliding condition, the predominant wear mechanism of the Ti-based BMG was characterized as the oxidation and abrasive wear. Under the PBS-solution condition, although the Ti-based BMG suffered from tribocorrosion that is controlled by the combined effects of abrasive and corrosive wear, the wear resistance of the Ti-based BMG was three times lower than that of the Ti−6Al−4V alloy and slightly inferior to that of the Co−28Cr−6Mo alloy. The effect of corrosion behavior on wear resistance of the Ti-based BMG in the PBS solution is discussed.

中文翻译：

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无镍钛基块状金属玻璃在空气和模拟生理环境中的摩擦学行为

摘要 无镍钛基块状金属玻璃（BMGs）具有良好的机械性能、高耐腐蚀性和良好的生物相容性，是潜在的生物材料。对于作为承载骨科植入材料的应用，需要出色的耐磨性。在本研究中，研究了不含 Ni 的 Ti47Cu38Zr7.5Fe2.5Sn2Si1Ag2 BMG 在空气和磷酸盐缓冲盐水 (PBS) 溶液中的摩擦学行为，并与 Ti−6Al−4V 和 Co−28Cr−6Mo 合金进行了比较。发现Ti基BMG在空气中的耐磨性优于Ti-6Al-4V合金，并与Co-28Cr-6Mo合金平行，主要归因于Ti-6Al-4V合金的高硬度。基于 BMG。在干滑动条件下，钛基 BMG 的主要磨损机制表现为氧化磨损和磨粒磨损。在 PBS 溶液条件下，虽然 Ti 基 BMG 受到磨损和腐蚀磨损共同影响的摩擦腐蚀，但 Ti 基 BMG 的耐磨性比 Ti−6Al− 低 3 倍。 4V 合金，略逊于 Co-28Cr-6Mo 合金。讨论了腐蚀行为对 PBS 溶液中 Ti 基 BMG 耐磨性的影响。