Oxide scales of modified Fe-Cr alloy (low Si and Al concentrations) in reducing atmospheres

T. Horita, K. Yamaji, N. Sakai, H. Yokokawa, A. Toji, T. Uehara, T. Seo, K. Ogasawara, H. Kameda, Y. Matsuzaki, S. Yamashita

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Oxide scale formation was examined on the modified Fe-Cr alloys (Si and Al reduced concentrations) in H2-H2O or CH4-H 2O atmospheres to simulate solid oxide fuel cell (SOFC) fuels The formed oxide scales were characterized by surface and depth profile analyses. The oxide scale was composed of the following oxide phases from surface to inner oxide scale: Mn-Cr-(Fe) spinel layer, Cr2O3 layer, and Si-rich interface, and Al2O3 internal oxide. Although the scale formation mechanism is similar between modified and conventional alloys, the oxide scale growth rates were decreased in the modified Fe-Cr alloy. The electrical conductivity of oxidized Fe-Cr alloys was improved in the modified Fe-Cr alloy due to thinner oxide scale thickness and less distribution of insulating Si and Al internal oxides.

Original languageEnglish
Title of host publicationECS Transactions - 10th International Symposium on Solid Oxide Fuel Cells, SOFC-X
Pages2363-2370
Number of pages8
Edition1 PART 2
DOIs
Publication statusPublished - 2007
Externally publishedYes
Event10th International Symposium on Solid Oxide Fuel Cells, SOFC-X - , Japan
Duration: Jun 3 2007Jun 8 2007

Publication series

NameECS Transactions
Number1 PART 2
Volume7
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

Other10th International Symposium on Solid Oxide Fuel Cells, SOFC-X
Country/TerritoryJapan
Period6/3/076/8/07

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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