腐蚀
奥氏体
材料科学
冶金
晶间腐蚀
奥氏体不锈钢
图层(电子)
扩散
多孔性
基质(化学分析)
表层
复合材料
微观结构
热力学
物理
作者
Trishelle M. Copeland-Johnson,Charles K. A. Nyamekye,Lynne Ecker,Nicola Bowler,Emily A. Smith,Raúl B. Rebak,Simerjeet K. Gill
标识
DOI:10.1016/j.corsci.2023.111167
摘要
Stainless Steel 304 is being investigated for accident tolerant claddings. In this investigation, we use multi-modal characterization to evaluate oxidation under laboratory air versus 100% steam at 1200 ºC for 2 h. Air oxidation features Fe(NiMn)O4, Fe3O4, Fe(3−x)CrxO4, and Cr2O3. Steam oxidation produces a dual layer, containing Fe2O3-enriched porous outer layer and sub-surface matrix of Fe3O4/Fe(3−x)CrxO4 with SiO2/Fe(3−x)SixO4. From these findings, we postulate the oxidation mechanism. Arrangement of oxidation products in air corroborates with anticipated diffusion behavior, except Cr2O3. However, arrangement in steam deviates due to presumably intergranular interactions with H2O, resulting in the sub-surface matrix.
科研通智能强力驱动
Strongly Powered by AbleSci AI