Effect of nitrogen on corrosion behaviour of a novel high nitrogen medium-entropy alloy CrCoNiN manufactured by pressurized metallurgy

查看全文 作　　者：Hao [1]Feng;Huabing [1]Li;Xiaolei [2]Wu;Zhouhua [1]Jiang;Si [1]Zhao;Tao [3]Zhang;Dake [3]Xu;Shucai [1]Zhang;Hongchun [1]Zhu;Binbin [1]Zhang;Muxin [2]Yang

机构地区：[1]School of Metallurgy, Northeastern University, Shenyang 110819, China;[2]State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;[3]School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China

出　　处：《Journal of Materials Science & Technology》索引2018年第34卷第10期,共10页

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51434004,U1435205,51774074);the Transformation Project of Major Scientific and Technological Achievements in Shenyang(Grant No.Z17-5-003) 摘　　要：A novel high nitrogen medium-entropy alloy CrCoNiN, which had higher strength and slightly lower ductility than CrCoNi alloy, was successfully manufactured by pressurized metallurgy. The microstructure and corrosion behaviour were investigated by microscopic, electrochemical and spectroscopic methods.The results indicated that nitrogen existed in the form of Cr_2N precipitates and uniformly distributed N atoms, and nitrogen alloying significantly refined the grain size. Besides, nitrogen enriched on the outmost surface of passive film and metal/film interface as ammonia(NH-_3 and NH_4^+) and CrN, respectively. The significant improvement of corrosion resistance of CrCoNiN was attributed to the lower metastable pitting susceptibility together with thicker, less defective and more compact passive film. 关键词：腐蚀行为高氮合金等熵生产密封冶金学微观结构

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Effect of nitrogen on corrosion behaviour of a novel high nitrogen medium-entropy alloy CrCoNiN manufactured by pressurized metallurgy

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