한국표면공학회지 (Journal of Surface Science and Engineering)

  • 제36권2호
  • /
  • Pages.128-134
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  • 2003
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  • 1225-8024(pISSN)
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  • 2288-8403(eISSN)
한국표면공학회 (The Korean Institute of Surface Engineering)
권호 표지

Ti-43%Al-2%W-0.1%Si 합금의 고온산화

High Temperature Oxidation of Ti-43%Al-2%W-0.1%Si Alloys

  • 심웅식 (성균관대학교 금속재료공학부) ;
  • 이동복 (성균관대학교 금속재료공학부)
  • 발행 : 2003.04.01
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초록

Alloys of Ti-43%Al-2%W-0.1%Si were oxidized isothermally and cyclically between $900^{\circ}C$ and$ 1050^{\circ}C$, and their oxidation characteristics were studied. During isothermal tests, the alloys oxidized slowly up to 100$0^{\circ}C$, but fast at $1050^{\circ}C$. Though the scale adherence was not good above $900^{\circ}C$, the alloys displayed better oxidation behavior than unalloyed TiAl alloys. The oxide scales consisted primarily of an outer $TiO_2$ layer, intermediate $Al_2$$O_3$-rich layer, and an inner mixed layer of (TiO$_2$ $+Al_2$$O_3$). Tungsten was present mainly at the lower part of the oxide scale, while Si over the whole oxide scale.

키워드

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