Abstract Although Ti-based alloys have shown improved biocompatibility, the release of metal ions at long implantation times due to reduced surface hardness and wear resistance results in reduced service lifetimes of implants and cause implant loosening. To overcome these limitations and extend the lifetime of Ti-based implants, a TiN ceramic coating was deposited on the developed Ti20Nb13Zr (TNZ) alloy by using cathodic arc physical vapor deposition. The objective of this paper was to examine and assess the performance of the coating and its influence on surface hardness, in- vitro corrosion, wear rate and friction coefficient. The results exhibited that the TiN coating led to an enhancement of the surface hardness of 23.1 GPa and modulus of elasticity of 224.6 GPa. In-vitro corrosion investigations showed better corrosion protection for the coated alloy in both simulated body fluid and artificial saliva compared to the uncoated alloy. The coefficient of friction (~ 0.4) of the coated alloy was almost 30% less than that of the TNZ alloy, and the wear rate of the coated TNZ was 0.62 ± 0.07×10−5 mm3/Nm compared to 3.9 ± 0.8×10−5 mm3/Nm for the uncoated sample. The obtained results indicate that coating the TNZ alloy with TiN may be a promising option for biomedical uses.

中文翻译：

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用于生物医学应用的 Ti20Nb13Zr 合金上通过阴极电弧物理气相沉积制备的 TiN 涂层的机械、体外腐蚀和摩擦学特性

摘要 虽然钛基合金已显示出改善的生物相容性，但由于表面硬度和耐磨性降低，长时间植入后金属离子的释放会导致植入物的使用寿命缩短并导致植入物松动。为了克服这些限制并延长钛基植入物的使用寿命，通过使用阴极电弧物理气相沉积在开发的 Ti20Nb13Zr (TNZ) 合金上沉积了 TiN 陶瓷涂层。本文的目的是检查和评估涂层的性能及其对表面硬度、体外腐蚀、磨损率和摩擦系数的影响。结果表明，TiN涂层使表面硬度提高了23.1 GPa，弹性模量提高了224.6 GPa。体外腐蚀研究表明，与未涂层合金相比，涂层合金在模拟体液和人工唾液中具有更好的腐蚀保护。涂层合金的摩擦系数 (~ 0.4) 比 TNZ 合金低近 30%，涂层 TNZ 的磨损率为 0.62 ± 0.07×10−5 mm3/Nm，而 3.9 ± 0.8×10 -5 mm3/Nm 用于未涂层样品。获得的结果表明，用 TiN 涂覆 TNZ 合金可能是生物医学用途的一个有前途的选择。