Utilizing nanotechnology and composites to create a protective film on titanium alloy is an effective means of achieving the desired high performance. Self-assembly of nanocomposite structures offers a promising route to forming high entropy alloy films (HEAFs), but controlled preparation remains challenging. This work used magnetron sputtering through adjusting preparation parameters to prepare ZrNbTiCrCu HEAFs, achieving a significant improvement in corrosion resistance and biocompatibility induced by the precipitation of Cu. According to the electrochemical corrosion test, without obvious corrosion pits on the surface of S2 after corrosion, a passivation film composed of bimetallic oxide CuCrO₂ formed on the film surface, indicating that ZrNbTiCrCu HEAFs have remarkable corrosion resistance performance. In the cytocompatibility experiment, the cell viability of HEAFs reached over 95 % due to the precipitation of Cu, suggesting their excellent biocompatibility. In addition, ZrNbTiCrCu HEAFs exhibit outstanding antibacterial ability, especially when the sputtering current is 0.6 A, and the in vitro antibacterial rate of the sample against Escherichia coli is close to 99 %.

中文翻译：

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Cu 析出诱导的 ZrNbTiCrCu 高熵膜的耐腐蚀性和生物相容性显著提高


利用纳米技术和复合材料在钛合金上形成保护膜是实现所需高性能的有效手段。纳米复合材料结构的自组装为形成高熵合金薄膜 （HEAFs） 提供了一种有前途的途径，但受控制备仍然具有挑战性。本工作通过调整制备参数利用磁控溅射制备了 ZrNbTiCrCu HEAFs，实现了 Cu 沉淀诱导的耐腐蚀性和生物相容性的显著提高。根据电化学腐蚀试验，腐蚀后S2表面无明显腐蚀坑，在膜表面形成由双金属氧化物CuCrO₂组成的钝化膜，表明ZrNbTiCrCu HEAFs具有显著的耐腐蚀性能。在细胞相容性实验中，由于 Cu 的沉淀，HEAFs 的细胞活力达到 95% 以上，表明它们具有出色的生物相容性。此外，ZrNbTiCrCu HEAFs 表现出出色的抗菌能力，尤其是在溅射电流为 0.6 A 时，样品对大肠杆菌的体外抗菌率接近 99 %。