Abstract The mechanical properties, electrochemical behavior, wear and corrosive-wear performance of a Pd40Cu30Ni10P20 bulk metallic glass (BMG) were studied. It is found that the Pd-based BMG shows high hardness of over 500 HV, which is superior to that of conventional biomedical alloys, like the CoCrMo alloy, 316 L stainless steel (SS), and Ti6Al4V alloy. The Pd-based BMG possesses a great corrosion resistance in the phosphate buffer saline (PBS) solution, which is ascribed to the formation of a highly-protective Pd-enriched sub-surface structure. The Pd-based BMG exhibits the greater dry- and corrosive-wear resistance than that of traditional crystalline biomedical alloys studied in this work. This trend can effectively ensure the working longevity of the Pd-based BMG as orthopedic implant. The triobocorrosion experiment results illustrate that the extremely high corrosive-wear resistance of the Pd-based BMG can be attributed to the high passivation capacity during wet sliding. The possible mechanism of the corrosion-accelerating wear deterioration is discussed, which provides the guidance for the improvement in the corrosive-wear resistance of Pd-based BMGs for their potential biomedical applications.

中文翻译：

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具有优异耐腐蚀磨损性的生物相容性 Pd 基 BMG，适用于植入物应用

摘要 研究了Pd40Cu30Ni10P20块状金属玻璃（BMG）的力学性能、电化学行为、磨损和腐蚀磨损性能。结果表明，Pd 基 BMG 显示出超过 500 HV 的高硬度，优于传统的生物医学合金，如 CoCrMo 合金、316 L 不锈钢（SS）和 Ti6Al4V 合金。Pd 基 BMG 在磷酸盐缓冲盐水 (PBS) 溶液中具有很好的耐腐蚀性，这归因于形成了高度保护的富含 Pd 的亚表面结构。与本工作中研究的传统结晶生物医学合金相比，Pd 基 BMG 表现出更高的耐干磨损和耐腐蚀磨损能力。这种趋势可以有效地保证钯基 BMG 作为骨科植入物的使用寿命。三氧化腐蚀实验结果表明，Pd 基 BMG 极高的耐腐蚀性能可归因于湿滑动过程中的高钝化能力。讨论了腐蚀加速磨损恶化的可能机制，为提高 Pd 基 BMGs 的抗腐蚀磨损性能提供了指导，以促进其潜在的生物医学应用。