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TEM comparative study on oxide films of 316L and T91 steel exposed to 350-500℃ steam

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摘要 The oxide films of 316L and T91 exposed to 350-500℃ steam were investigated using transmission electron microscopy(TEM).Independent of the exposure temperature,a triplex oxide structure with outer magnetite,inner Cr-rich(Fe_(1.4)Cr_(1.6)O_(4)),and Ni-rich layer formed on 316L,while only a duplex layer with outer magnetite and inner Cr-rich(Fe_(2.2)Cr_(0.8)O_(4))layer formed on T91.As the fast channels for oxidant and the obstacles for solid-state diffusion,nanopores are distributed evenly in the Cr-rich inner layer and are more abundant in 316L than in T91.The oxidation behavior of the materials was understood based on the microscopic characteristics of the oxide films.
出处 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2024年第8期10-21,共12页 材料科学技术(英文版)
基金 supported by the National Natural Science Foundation of China(Nos.12005269 and U1832206).
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