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Surface Structure Analysis of Initial High-Temperature Oxidation of SS441 Stainless Steel

Chromia-forming ferritic stainless steel (FSS) is a highly promising interconnect material for application in solid oxide fuel cells. In this study, initial oxidation of chromium oxides was performed at 500–800 °C to understand the evolution of materials at an early stage. The structural variations...

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Autores principales: Yung, Tung-Yuan, Tseng, Hui-Ping, Lu, Wen-Feng, Tsai, Kun-Chao, Shen, Tien, Cheng, Hsin-Ming, Chen, Jeng-Shiung, Chen, Po-Tuan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8538194/
https://www.ncbi.nlm.nih.gov/pubmed/34683728
http://dx.doi.org/10.3390/ma14206136
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author Yung, Tung-Yuan
Tseng, Hui-Ping
Lu, Wen-Feng
Tsai, Kun-Chao
Shen, Tien
Cheng, Hsin-Ming
Chen, Jeng-Shiung
Chen, Po-Tuan
author_facet Yung, Tung-Yuan
Tseng, Hui-Ping
Lu, Wen-Feng
Tsai, Kun-Chao
Shen, Tien
Cheng, Hsin-Ming
Chen, Jeng-Shiung
Chen, Po-Tuan
author_sort Yung, Tung-Yuan
collection PubMed
description Chromia-forming ferritic stainless steel (FSS) is a highly promising interconnect material for application in solid oxide fuel cells. In this study, initial oxidation of chromium oxides was performed at 500–800 °C to understand the evolution of materials at an early stage. The structural variations in oxide scales were analyzed through scanning electron microscopy, energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), X-ray diffractometry (XRD), laser confocal microscopy (LSCM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Surface electrochemical properties were investigated through electrochemical impedance spectroscopy to understand how the heat treatment temperature affected surface impedance. Treatment temperatures higher than 700 °C facilitate the diffusion of Cr and Mn, thus allowing ferritic spinels to form on the surface and leading to high electrical conductivity.
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spelling pubmed-85381942021-10-24 Surface Structure Analysis of Initial High-Temperature Oxidation of SS441 Stainless Steel Yung, Tung-Yuan Tseng, Hui-Ping Lu, Wen-Feng Tsai, Kun-Chao Shen, Tien Cheng, Hsin-Ming Chen, Jeng-Shiung Chen, Po-Tuan Materials (Basel) Article Chromia-forming ferritic stainless steel (FSS) is a highly promising interconnect material for application in solid oxide fuel cells. In this study, initial oxidation of chromium oxides was performed at 500–800 °C to understand the evolution of materials at an early stage. The structural variations in oxide scales were analyzed through scanning electron microscopy, energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), X-ray diffractometry (XRD), laser confocal microscopy (LSCM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. Surface electrochemical properties were investigated through electrochemical impedance spectroscopy to understand how the heat treatment temperature affected surface impedance. Treatment temperatures higher than 700 °C facilitate the diffusion of Cr and Mn, thus allowing ferritic spinels to form on the surface and leading to high electrical conductivity. MDPI 2021-10-15 /pmc/articles/PMC8538194/ /pubmed/34683728 http://dx.doi.org/10.3390/ma14206136 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yung, Tung-Yuan
Tseng, Hui-Ping
Lu, Wen-Feng
Tsai, Kun-Chao
Shen, Tien
Cheng, Hsin-Ming
Chen, Jeng-Shiung
Chen, Po-Tuan
Surface Structure Analysis of Initial High-Temperature Oxidation of SS441 Stainless Steel
title Surface Structure Analysis of Initial High-Temperature Oxidation of SS441 Stainless Steel
title_full Surface Structure Analysis of Initial High-Temperature Oxidation of SS441 Stainless Steel
title_fullStr Surface Structure Analysis of Initial High-Temperature Oxidation of SS441 Stainless Steel
title_full_unstemmed Surface Structure Analysis of Initial High-Temperature Oxidation of SS441 Stainless Steel
title_short Surface Structure Analysis of Initial High-Temperature Oxidation of SS441 Stainless Steel
title_sort surface structure analysis of initial high-temperature oxidation of ss441 stainless steel
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8538194/
https://www.ncbi.nlm.nih.gov/pubmed/34683728
http://dx.doi.org/10.3390/ma14206136
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