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Influence of precipitation on initial high-temperature oxidation of Ti-Nb stabilized ferritic stainless steel SOFC interconnect alloy

Ali-Loytty, H.; Jussila, P.; Juuti, T.; Karjalainen, L. P.; Zakharov, Alexei LU and Valden, M. (2012) In International Journal of Hydrogen Energy 37(19). p.14528-14535
Abstract
Oxidation phenomena on Laves phase forming Ti-Nb stabilized ferritic stainless steel (EN 1.4509) were studied at 650 degrees C by electron microscopic and electron spectroscopic methods. These investigations reveal a strong competition between Nb and Si for interfacial oxidation at the oxide metal interface that is affected by different segregation rates of Nb and Si at elevated temperatures. In particular, formation of Si containing Laves (FeNbSi)-type intermetallic compounds in the bulk results in non-uniform distribution of Si oxide at the interface. This has direct implications to the electrical properties of this alloy in solid oxide fuel cell (SOFC) applications. Furthermore, these results provide better understanding to the... (More)
Oxidation phenomena on Laves phase forming Ti-Nb stabilized ferritic stainless steel (EN 1.4509) were studied at 650 degrees C by electron microscopic and electron spectroscopic methods. These investigations reveal a strong competition between Nb and Si for interfacial oxidation at the oxide metal interface that is affected by different segregation rates of Nb and Si at elevated temperatures. In particular, formation of Si containing Laves (FeNbSi)-type intermetallic compounds in the bulk results in non-uniform distribution of Si oxide at the interface. This has direct implications to the electrical properties of this alloy in solid oxide fuel cell (SOFC) applications. Furthermore, these results provide better understanding to the controversial role of second phases (e.g. Laves, chi) on high-temperature oxidation (as recently discussed by Dae Won Yon, Hyung Suk Seo, Jae Ho Jae Myung Lee, Do Hyuong Kim, Kyoo Young Kim in Int J Hydrogen Energy 2011;36:5595-5603). Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. (Less)
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author
organization
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Contribution to journal
publication status
published
subject
keywords
Stainless steel, Interfaces, Oxidation, Solid oxide fuel cell, Interconnect, X-ray photoelectron spectroscopy
in
International Journal of Hydrogen Energy
volume
37
issue
19
pages
14528 - 14535
publisher
Elsevier
external identifiers
  • wos:000309493600068
  • scopus:84866115481
ISSN
1879-3487
DOI
10.1016/j.ijhydene.2012.07.097
language
English
LU publication?
yes
id
a6cb07fb-8a3b-4500-99a3-d828ffb16794 (old id 3283765)
date added to LUP
2012-12-20 11:12:12
date last changed
2017-02-12 03:48:05
@article{a6cb07fb-8a3b-4500-99a3-d828ffb16794,
  abstract     = {Oxidation phenomena on Laves phase forming Ti-Nb stabilized ferritic stainless steel (EN 1.4509) were studied at 650 degrees C by electron microscopic and electron spectroscopic methods. These investigations reveal a strong competition between Nb and Si for interfacial oxidation at the oxide metal interface that is affected by different segregation rates of Nb and Si at elevated temperatures. In particular, formation of Si containing Laves (FeNbSi)-type intermetallic compounds in the bulk results in non-uniform distribution of Si oxide at the interface. This has direct implications to the electrical properties of this alloy in solid oxide fuel cell (SOFC) applications. Furthermore, these results provide better understanding to the controversial role of second phases (e.g. Laves, chi) on high-temperature oxidation (as recently discussed by Dae Won Yon, Hyung Suk Seo, Jae Ho Jae Myung Lee, Do Hyuong Kim, Kyoo Young Kim in Int J Hydrogen Energy 2011;36:5595-5603). Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.},
  author       = {Ali-Loytty, H. and Jussila, P. and Juuti, T. and Karjalainen, L. P. and Zakharov, Alexei and Valden, M.},
  issn         = {1879-3487},
  keyword      = {Stainless steel,Interfaces,Oxidation,Solid oxide fuel cell,Interconnect,X-ray photoelectron spectroscopy},
  language     = {eng},
  number       = {19},
  pages        = {14528--14535},
  publisher    = {Elsevier},
  series       = {International Journal of Hydrogen Energy},
  title        = {Influence of precipitation on initial high-temperature oxidation of Ti-Nb stabilized ferritic stainless steel SOFC interconnect alloy},
  url          = {http://dx.doi.org/10.1016/j.ijhydene.2012.07.097},
  volume       = {37},
  year         = {2012},
}