Role of Alloy Grain Boundaries in the High-Temperature Oxidation and Cr Volatilization of 22 Wt.% Cr Ferritic Stainless Steel for Sofc Applications

作     者：Kim, Byung Kyu Ko, Yoon Seok Jung, In-Ho Han, Heung Nam Yi, Kyung-Woo Kim, Dong-Ik 

作者机构：Energy Materials Research Center Korea Institute of Science and Technology 5 Hwarangro 14-gil Seongbuk-gu Seoul02792 Korea Republic of Department of Materials Science and Engineering Seoul National University 1 Gwanak-ro Gwanak-gu Seoul08826 Korea Republic of Research Institute of Advanced Materials Korea Republic of 

出 版 物：《SSRN》 

年 卷 期：2022年

核心收录：

主　　题：Ferrite 

摘      要：The effects of the alloy grain size of high-Cr ferritic stainless steel were investigated using a sheet (t = 2 mm) and plate (t = 22 mm) of Cr ferritic stainless steel. The measured average grain size of the samples was ~ 25 μm and ~ 500 μm, respectively. The large-grained plate sample exhibited a 41% reduction in oxidation rate, and a slight decrease in Cr volatilization was observed in the small-grained sheet sample. Numerical analysis revealed that inhomogeneous GB-related oxidation is a major cause of differences in oxidation kinetics affected by metal grain size. © 2022, The Authors. All rights reserved.