Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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High-temperature Oxidation Kinetics and Scales Formed on Fe-2.3%Cr-1.6%W Alloy

Fe-2.3%Cr-1.6%W 합금의 고온산화 부식속도와 스케일 분석

  • 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)
  • 박상환 (성균관대학교 신소재공학부) ;
  • 김민정 (성균관대학교 신소재공학부) ;
  • 이재호 (성균관대학교 신소재공학부) ;
  • 봉성준 (성균관대학교 신소재공학부) ;
  • 김슬기 (성균관대학교 신소재공학부) ;
  • 이동복 (성균관대학교 신소재공학부)
  • Received : 2010.10.21
  • Accepted : 2010.11.18
  • Published : 2011.01.31
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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

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