한국재료학회지 (Korean Journal of Materials Research)

  • 제14권6호
  • /
  • Pages.394-398
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  • 2004
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  • 1225-0562(pISSN)
  • /
  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
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TiAl-W-Zr 합금에 생성된 고온산화막 분석

Characterization of Oxide Scales Formed on TiAl-W-Zr Alloys

  • 우성욱 (성균관 대학교 금속재료공학부) ;
  • 이동복 (성균관 대학교 금속재료공학부)
  • Woo Sung-Wook (Department of Advanced Materials & Engineering, Sungkyunkwan University) ;
  • Lee Dong-Bok (Department of Advanced Materials & Engineering, Sungkyunkwan University)
  • 발행 : 2004.06.01
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초록

A Ti47Al1.7W-3.7Zr alloy was oxidized between $900^{\circ}C$ and $1050^{\circ}C$, and the oxide scales formed were studied. The oxide scales consisted primarily of an outer$TiO_2$ layer, an intermediate $Al_2$$O_3$-rich layer, and an inner mixed ($TiO _2$ + $Al_2$$O_3$) layer. Besides $TiO_2$ and $Al_2$$O_3$, oxidation led to the formation of some $Ti_2$AlN and TiN. Both W and Zr were preferentially segregated below the intermediate $Al_2$$O_3$-rich layer. Tungsten in the oxide scale was present as $WO_3$ and ${Ti}_{x}$$W_{1-x}$, whereas zirconium as monoclic-$ZrO_2$ and tetragonal-$ZrO_2$.

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