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Title: Oxidation Characteristics of Two FeCrAl Alloys in Air and Steam from 800°C to 1300°C

Abstract

Iron-chromium-aluminum (FeCrAl) alloys are being investigated as cladding material for urania nuclear fuel in light water power reactors. One extraor-dinary attribute of the FeCrAl alloys is their resistance to attack by air and steam up to their melting point. It was of interest to study the kinetics of oxidation of FeCrAl from 800 °C to 1300 °C in air and in steam to determine how the oxides evolve to provide protection to the alloys. The two investigated alloys were APMT (Fe-21Cr-5Al-3Mo) and C26M (Fe-12Cr-6Al-2Mo). Results show that both alloys had similar oxidation kinetics despite their different chemical compositions. For the testing times, the oxidation rate was higher in air than in steam at the higher temperatures (1100–1300 °C) and higher in steam than in air at the lower temperatures (800–1100 °C). In the lower temperature range, the surface oxide consisted of two layers, an internal layer rich in aluminum and an external layer containing Al, Cr, and Fe. In the higher temperature range, the oxide was a single layer of alumina (no Cr, no Fe, no Mo).

Authors:
ORCiD logo [1];  [1];  [1]
  1. GE Global Research, Schenectady, NY (United States)
Publication Date:
Research Org.:
General Electric Co., Niskayuna, NY (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1511459
Grant/Contract Number:  
NE0008221
Resource Type:
Accepted Manuscript
Journal Name:
JOM. Journal of the Minerals, Metals & Materials Society
Additional Journal Information:
Journal Volume: 70; Journal Issue: 8; Journal ID: ISSN 1047-4838
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Rebak, Raul B., Gupta, Vipul K., and Larsen, Michael. Oxidation Characteristics of Two FeCrAl Alloys in Air and Steam from 800°C to 1300°C. United States: N. p., 2018. Web. doi:10.1007/s11837-018-2979-9.
Rebak, Raul B., Gupta, Vipul K., & Larsen, Michael. Oxidation Characteristics of Two FeCrAl Alloys in Air and Steam from 800°C to 1300°C. United States. doi:10.1007/s11837-018-2979-9.
Rebak, Raul B., Gupta, Vipul K., and Larsen, Michael. Wed . "Oxidation Characteristics of Two FeCrAl Alloys in Air and Steam from 800°C to 1300°C". United States. doi:10.1007/s11837-018-2979-9. https://www.osti.gov/servlets/purl/1511459.
@article{osti_1511459,
title = {Oxidation Characteristics of Two FeCrAl Alloys in Air and Steam from 800°C to 1300°C},
author = {Rebak, Raul B. and Gupta, Vipul K. and Larsen, Michael},
abstractNote = {Iron-chromium-aluminum (FeCrAl) alloys are being investigated as cladding material for urania nuclear fuel in light water power reactors. One extraor-dinary attribute of the FeCrAl alloys is their resistance to attack by air and steam up to their melting point. It was of interest to study the kinetics of oxidation of FeCrAl from 800 °C to 1300 °C in air and in steam to determine how the oxides evolve to provide protection to the alloys. The two investigated alloys were APMT (Fe-21Cr-5Al-3Mo) and C26M (Fe-12Cr-6Al-2Mo). Results show that both alloys had similar oxidation kinetics despite their different chemical compositions. For the testing times, the oxidation rate was higher in air than in steam at the higher temperatures (1100–1300 °C) and higher in steam than in air at the lower temperatures (800–1100 °C). In the lower temperature range, the surface oxide consisted of two layers, an internal layer rich in aluminum and an external layer containing Al, Cr, and Fe. In the higher temperature range, the oxide was a single layer of alumina (no Cr, no Fe, no Mo).},
doi = {10.1007/s11837-018-2979-9},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
number = 8,
volume = 70,
place = {United States},
year = {2018},
month = {6}
}

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