The beneficial effect of surface engineering on the wear and corrosion performance of Ti-6Al-4V alloy for biomedical purposes has recently gained a lot of interest. To date, researchers have shown TiN ceramic coatings to be an effective strategy to improve the poor tribocorrosion properties of Ti-based alloys. However, coating degradation and adhesions remains a major hurdle to overcome for successful clinical translation. Recently, a duplex TPON+TiN treatment process on Ti-alloy has been suggested for applications involving with high contact loads. For the first time, this technique was extended to the Additive Layer Manufactured (ALM) Ti-6Al-4V alloys in an attempt to enable load bearing patient personalised implants. The bio-tribology and corrosion resistance of the coated ALM materials were compared with that of the coatings on conventional wrought manufactured alloy for orthopaedic applications. XRD analysis showed that the coatings on both substrates are primarily composed of TiN. The Knoop microhardness technique proved a tribologically effective diffusion layer with a case depth of 35 – 45 μm. The L_C2 and L_C3 values were measured above 40 N and 60 N which is an excellent cohesive and adhesive strength for these types of the coatings. Electrochemical measurements in both static and sliding conditions showed a quick recovery capability of the protective layer in 25% Foetal Bovine Serum (FBS) diluted in Phosphate Buffered Saline (PBS) electrolyte. The static electrochemical measurements also showed reduced corrosion current densities when compared to that of the bulk Ti-alloy. Coating on both substrates showed an excellent wear resistance which is correlated to the enhanced load bearing capacity of the coated surfaces. While the coating thickness was 3-6 μm, the wear depth was only 0.3 μm after 2 hours of reciprocating sliding wear test.

表面工程对用于生物医学用途的 Ti-6Al-4V 合金的磨损和腐蚀性能的有益影响最近引起了很多兴趣。迄今为止，研究人员已经证明 TiN 陶瓷涂层是改善 Ti 基合金不良摩擦腐蚀性能的有效策略。然而，涂层降解和粘附仍然是成功临床转化需要克服的主要障碍。最近，针对高接触负载的应用提出了钛合金上的双工 TPON+TiN 处理工艺。首次将该技术扩展到制造添加剂层 (ALM) Ti-6Al-4V 合金，以尝试实现承载患者的个性化植入物。将涂层 ALM 材料的生物摩擦学和耐腐蚀性与用于骨科应用的传统锻造合金上的涂层进行了比较。XRD 分析表明，两种基材上的涂层主要由 TiN 组成。Knoop 显微硬度技术证明了一种摩擦学上有效的扩散层，表面深度为 35 – 45 μm。大号_C2和 L _C3值是在 40 N 和 60 N 以上测得的，这对于这些类型的涂层来说是极好的内聚和粘合强度。静态和滑动条件下的电化学测量表明，在磷酸盐缓冲盐水 (PBS) 电解质中稀释的 25% 胎牛血清 (FBS) 中，保护层具有快速恢复能力。与体钛合金相比，静态电化学测量还显示腐蚀电流密度降低。两种基材上的涂层都表现出优异的耐磨性，这与涂层表面的承载能力增强有关。而涂层厚度为3-6 μm，经过2小时的往复滑动磨损试验，磨损深度仅为0.3 μm。