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http://dx.doi.org/10.4191/KCERS.2011.48.1.057

High-temperature Oxidation Kinetics and Scales Formed on Fe-2.3%Cr-1.6%W Alloy  

Bak, Sang-Hwan (School of Advanced Materials Science and Engineering, SungkyunkwanUniversity)
Kim, Min-Jung (School of Advanced Materials Science and Engineering, SungkyunkwanUniversity)
Lee, Jae-Ho (School of Advanced Materials Science and Engineering, SungkyunkwanUniversity)
Bong, Sung-June (School of Advanced Materials Science and Engineering, SungkyunkwanUniversity)
Kim, Seul-Ki (School of Advanced Materials Science and Engineering, SungkyunkwanUniversity)
Lee, Dong-Bok (School of Advanced Materials Science and Engineering, SungkyunkwanUniversity)
Publication Information
Journal of the Korean Ceramic Society / v.48, no.1, 2011 , pp. 57-62 More about this Journal
Abstract
The T23 steel, whose composition was Fe-2.3%Cr-1.6%W, was arc-melted, and oxidized between $600^{\circ}C$ and $900^{\circ}C$ in air for up to 7 months. The amount of precipitates in the arc-melted microstructure was as large as 11.4 vol.%. The precipitates increased the oxidation rate of the arc-melted T23 steel. Owing to the low amount of Cr in the T23 steel, breakaway oxidation occurred after a few hours during oxidation above $700^{\circ}C$ in both arc-melted and as-received T23 steels. The scales that formed on arc-melted and as-received T23 steels were similar to each other. They consisted primarily of the outer $Fe_2O_3$ layer and the inner ($Fe_2O_3$, $FeCr_2O_4$)-mixed layer. The precipitates increased the microhardness and the oxidation rates.
Keywords
Oxidation; Steel; Scale; Iron; Chromium; Tungsten;
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