University Carlos III of Madrid, Department of Materials Science and Engineering, IAAB, Avda. Universidad, 30, 28911 Leganés, Spain.
University Carlos III of Madrid, Department of Materials Science and Engineering, IAAB, Avda. Universidad, 30, 28911 Leganés, Spain.
J Mech Behav Biomed Mater. 2019 Mar;91:335-344. doi: 10.1016/j.jmbbm.2018.12.029. Epub 2018 Dec 24.
The dry sliding wear behaviour of different Ti-Nb and Ti-Mo surfaces was investigated in order to evaluate the role of Nb and Mo β-stabilizing elements in titanium wear resistance to consider them for biomedical applications. Dry sliding wear tests were performed under unlubricated conditions using a ball-on-plate tribometer (UMT) with reciprocating lineal movement of 1 Hz frequency at different loads (2 and 5 N) and against two counterface materials (alumina and stainless steel) to assess the effect of these parameters on wear. The results indicated an improvement in wear resistance for all the modified Ti surfaces. Metal-on-metal surfaces exhibited higher wear rate than ceramic-on-metal, and higher wear was observed for the more severe conditions. Wear rate values on modified surfaces were between 53% and 96% lower compared to pure Ti tested at 2 N, and up to 79% lower than Ti at 5 N. In both cases the highest wear reduction was observed for Ti-Mo surface.
为了评估 Nb 和 Mo 等β稳定元素对钛耐磨性的作用，并考虑将其用于生物医学应用，研究了不同 Ti-Nb 和 Ti-Mo 表面的干式滑动磨损行为。使用带有往复线性运动（频率为 1 Hz）的球盘式摩擦磨损试验机（UMT）在无润滑条件下进行干式滑动磨损测试，在不同载荷（2 和 5 N）和两种对磨材料（氧化铝和不锈钢）下评估这些参数对磨损的影响。结果表明，所有改性 Ti 表面的耐磨性都得到了提高。金属对金属表面的磨损率高于陶瓷对金属，在更苛刻的条件下磨损更严重。与在 2 N 下测试的纯 Ti 相比，改性表面的磨损率值降低了 53%至 96%，在 5 N 下降低了 79%。在这两种情况下，Ti-Mo 表面的磨损降低幅度最大。
