Buchanan R A, Rigney E D, Williams J M
J Biomed Mater Res. 1987 Mar;21(3):367-77. doi: 10.1002/jbm.820210309.
Wear-accelerated corrosion rates at constant anodic potentials were evaluated for unimplanted and nitrogen-ion-implanted surgical Ti-6Al-4V while wearing against ultrahigh-molecular-weight polyethylene at stress levels up to 6.90 MPa (1000 psi). The ion implantation processing was found to reduce the wear corrosion rates in both saline and serum solutions at all applied stress levels. During wear testing, all of the ion-implanted surfaces remained visually unchanged from the polished condition. However, many of the unimplanted surfaces developed damage zones characterized by wear tracks and black wear debris. A surface-damage mechanism is proposed and discussed which involves disruption of the Ti-6Al-4V protective oxide film, subsequent entrapment of oxide particles in the polyethylene, then self-perpetuating damage due to the abrasive action of the embedded particles.
在高达6.90兆帕（1000磅力/平方英寸）的应力水平下，使未植入和氮离子植入的外科用Ti-6Al-4V与超高分子量聚乙烯相互磨损，评估了在恒定阳极电位下的磨损加速腐蚀速率。发现在所有施加的应力水平下，离子注入工艺都能降低在盐水和血清溶液中的磨损腐蚀速率。在磨损测试期间，所有离子注入表面在视觉上与抛光状态相比保持不变。然而，许多未植入表面形成了以磨损轨迹和黑色磨损碎屑为特征的损伤区域。提出并讨论了一种表面损伤机制，该机制涉及Ti-6Al-4V保护氧化膜的破坏，随后氧化物颗粒被困在聚乙烯中，然后由于嵌入颗粒的磨蚀作用导致自我持续损伤。
