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首页> 美国卫生研究院文献>International Journal of Nanomedicine >Wear studies on plasma-sprayed Al2O3 and 8mole of Yttrium-stabilized ZrO2 composite coating on biomedical Ti-6Al-4V alloy for orthopedic joint application
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Wear studies on plasma-sprayed Al2O3 and 8mole of Yttrium-stabilized ZrO2 composite coating on biomedical Ti-6Al-4V alloy for orthopedic joint application

机译：骨科联合用生物医学Ti-6Al-4V合金上等离子喷涂Al2O3和8mol％钇稳定ZrO2复合涂层的磨损研究

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This paper presents the wear characteristics of the composite ceramic coating made with Al2O3-40wt%8YSZ on the biomedical grade Ti-6Al-4V alloy (grade 5) used for total joint prosthetic components, with the aim of improving their tribological behavior. The coatings were deposited using a plasma spraying technique, and optimization of plasma parameters was performed using response surface methodology to obtain dense coating. The tribological behaviors of the coated and uncoated substrates were evaluated using a ball-on-plate sliding wear tester at 37°C in simulated body-fluid conditions. The microstructure of both the titanium alloy and coated specimen were examined using an optical microscope and scanning electron microscope. The hardness of the plasma-sprayed alumina–zirconia composite coatings was 2.5 times higher than that of the Ti-6Al-4V alloy, while the wear rate of Ti-6Al-4V alloy was 253 times higher than that of the composite-coated Ti-6Al-4V alloy. The superior wear resistance of the alumina–zirconia coated alloy is attributed to its enhanced hardness and intersplat bonding strength. Wear-track examination showed that the predominant wear mechanism of Ti-6Al-4V alloy was abrasive and adhesive wear, whereas, in the case of alumina–zirconia composite coated alloy, the wear was dominated by microchipping and microcracking.
机译：本文介绍了用Al2O3-40wt％8YSZ制成的复合陶瓷涂层在用于整体关节修复部件的生物医学级Ti-6Al-4V合金（5级）上的磨损特性，旨在改善其摩擦学性能。使用等离子喷涂技术沉积涂层，并使用响应表面方法对等离子体参数进行优化以获得致密涂层。在37°C的模拟体液条件下，使用球上板滑动磨损测试仪评估了涂层和未涂层​​基材的摩擦学行为。使用光学显微镜和扫描电子显微镜检查钛合金和涂层试样的微观结构。等离子喷涂的氧化铝-氧化锆复合涂层的硬度是Ti-6Al-4V合金的2.5倍，而Ti-6Al-4V合金的磨损率是Ti-6Al-4V合金的253倍。 -6Al-4V合金。氧化铝-氧化锆涂层合金的优异耐磨性归因于其增强的硬度和镀层间结合强度。磨损轨迹检查表明，Ti-6Al-4V合金的主要磨损机理是磨料磨损和粘着磨损，而在氧化铝-氧化锆复合涂层合金的情况下，磨损主要由微碎屑和微裂纹引起。

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