Department of Mechanical Engineering, University of Puerto Rico-Mayagüez, Call Box 9000, Mayaguez, PR 00680, USA.
J Mech Behav Biomed Mater. 2010 Nov;3(8):549-58. doi: 10.1016/j.jmbbm.2010.06.006. Epub 2010 Jul 3.
The wear properties of oxidized and non-oxidized gamma-TiAl (a potential biomaterial) as well as Ti-6Al-4V and CP-Ti disks were studied and characterized by means of standard wear tests using a custom made bone pin arrangement. The Ti-based disks were oxidized in air at 500 and 800 degrees C for one hour. The tribological properties of the oxides formed over the disks were studied using a linear reciprocating wear testing machine under both dry and simulated biological conditions using Ringer's solution. Loss of metal oxide and coefficient of friction values were determined from wear testing. From the results, abrasion and adhesion were the primary wear mechanisms in each of the three alloy-bone pairs. Specifically, the oxide formed on gamma-TiAl possessed the highest COF and wear resistance of the three materials which were studied. Also, as expected, bone wears down faster than the Ti-based metal oxide.
研究并通过使用定制骨销布置的标准磨损测试来对氧化和未氧化的γ-TiAl（一种潜在的生物材料）以及 Ti-6Al-4V 和 CP-Ti 盘的磨损性能进行了分析和特性描述。将 Ti 基盘在空气 500 和 800°C 下氧化 1 小时。在干摩擦和使用林格氏溶液的模拟生物条件下，使用线性往复式磨损试验机研究了盘上形成的氧化物的摩擦学性能。通过磨损测试确定了金属氧化物的损失和摩擦系数值。结果表明，在三种合金-骨对中，每种合金的主要磨损机制都是磨损和粘着。具体而言，在研究的三种材料中，γ-TiAl 上形成的氧化物具有最高的 COF 和耐磨性。而且，正如预期的那样，骨头比基于 Ti 的金属氧化物磨损得更快。
