Abstract Microstructural changes that result in relevant improvements in mechanical properties and electrochemical behavior can be induced using different sintering conditions of ASTM F75 cobalt alloys during their processing using powder metallurgy technique. It has been observed that the increase in carbon and nitrogen content improves corrosion resistance and mechanical properties as long as the precipitation of carbides and nitrides is avoided, thanks to the use of rapid cooling in water after the sintering stage. In addition, the reduction of the particle size of the powder improves hardness and resistance to corrosion in both acid medium with chlorides and phosphate-buffered medium that simulates the physiological conditions for its use as a biomaterial. These results lead to increased knowledge of the role of carbon and nitrogen content in the behavior displayed by the different alloys studied.

中文翻译：

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碳和氮在提高新型粉末冶金Co-Cr-Mo合金耐蚀性中的作用

摘要 在使用粉末冶金技术加工 ASTM F75 钴合金的过程中，使用不同的烧结条件可以引起显微结构变化，从而导致机械性能和电化学行为的相关改进。已经观察到，只要避免碳化物和氮化物的沉淀，碳和氮含量的增加就可以提高耐腐蚀性和机械性能，这要归功于在烧结阶段后在水中使用快速冷却。此外，粉末粒径的减小提高了硬度和在含有氯化物的酸性介质和磷酸盐缓冲介质中的硬度和耐腐蚀性，模拟生理条件将其用作生物材料。