한국표면공학회지 (Journal of the Korean institute of surface engineering)

  • 제44권1호
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  • Pages.13-20
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  • 2011
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  • 1225-8024(pISSN)
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  • 2288-8403(eISSN)
한국표면공학회 (The Korean Institute of Surface Engineering)
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Fe-22%Cr-5.8%Al 합금의 고온 산화 거동

High-Temperature Oxidation Behavior of Fe-22%Cr-5.8%Al Alloy

  • 김송이 (안동대학교 신소재공학부) ;
  • 최성환 (안동대학교 신소재공학부) ;
  • 윤중열 (한국기계연구원 부설 재료연구소 기능재료연구본부) ;
  • 공영민 (울산대학교 첨단소재공학부) ;
  • 김병기 (울산대학교 첨단소재공학부) ;
  • 이기안 (안동대학교 신소재공학부)
  • Kim, Song-Yi (School of Advanced Materials Engineering, Andong National University) ;
  • Choi, Sung-Hwan (School of Advanced Materials Engineering, Andong National University) ;
  • Yun, Jung-Yeul (Department of Materials Engineering, KIMM) ;
  • Kong, Young-Min (School of Materials Science Engineering, University of Ulsan) ;
  • Kim, Byoung-Kee (School of Materials Science Engineering, University of Ulsan) ;
  • Lee, Kee-Ahn (School of Advanced Materials Engineering, Andong National University)
  • 투고 : 2011.01.27
  • 심사 : 2011.02.27
  • 발행 : 2011.02.28
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초록

This study investigated the high temperature oxidation behavior of Fe-22%Cr-5.8%Al alloy and the oxidation kinetics of the alloy were discussed. Bulk samples were prepared by VAM (vacuum arc melting) and hot forging. High temperature oxidation testes were isothermally conducted up to 100 hours in 79%$N_2$+21%$O_2$ environment at three different temperatures ($900^{\circ}C$, $1000^{\circ}C$, $1100^{\circ}C$). The weight gain was measured after oxidation according to oxidation time (2, 4, 6, 8, 10, 15, 20, 25, 30, 60, 80, 100 hours). The weight gain significantly increased with increasing oxidation temperature. As the temperature increased, the oxidized samples showed sequential formation of $Al_2O_3$, Cr-rich oxide, Fe-rich oxide. The activation energy of high temperature oxidation was obtained as 306.63 KJ/mol. $Al_2O_3$ were developed on the surface in the early stage of oxidation, representing protective role of oxidation. However, Fe-based and Cr-based oxides leaded to breakaway of oxide layer, thus resulted in the significant increase of additional oxidation.

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피인용 문헌

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  2. Effect of Al2O3 Inter-Layer Grown on FeCrAl Alloy Foam to Improve the Dispersion and Stability of NiO Catalysts vol.25, pp.8, 2015, https://doi.org/10.3740/MRSK.2015.25.8.391