Comparison of Isothermal Oxidation Behavior of Co-10Cr-xSi (x=0,5,10) Alloys at 1073K
The oxidation of Co-10Cr-xSi (x=0, 5, 10, nominal composition, at.%) alloys in 0.1Mpa pure O2 at 1073K was investigated.Co-10Cr presents the worst oxidation resistance with the mass gain of about 7.531 mg/cm2 after 24h oxidation, while Co-10Cr-10Si presents the best oxidation resistance with the much lower mass gain of about 0.078 mg/cm2, which is about two magnitudes lower than that of Co-10Cr.The oxidation behavior of Co-10Cr-5Si is intermediate between that of Co-10Cr and Co-10Cr-10Si.The nodular oxides have occupied most surface of the alloy and their microstructure is similar to Co-10Cr to some extent.On the contrary, only a fraction of the surface is covered by Cr2O3 layer, whose microstructure is similar to that of Co-10Cr-10Si.
cobalt-chromium-silicon isothermal oxidation high temperature microstructure
Honghua Zhang Ganlan Yang Yao Chen Junhuai Xiang
Jiangxi Key Laboratory of Surface Engineering,Jiangxi Science and Technology Normal University,Nanchang 330013,China;School of Materials and Mechanical & Electrical Engineering,Jiangxi Science and Technology Normal University,Nanchang 330013,China
国内会议
长沙
英文
228-231
2016-11-11（万方平台首次上网日期，不代表论文的发表时间）