Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Characterization of Oxide Scales Formed on Fe3Al, Fe3Al-Cr, Fe3Al-Cr-Mo, Ni3Al and Ni3Al-Cr Alloys

Fe3Al, Fe3Al-Cr, Fe3Al-Cr-Mo, Ni3Al 및 Ni3Al-Cr 합금표면에 형성된 산화물 특성분석

  • Shim, Woung-Shik (Center for Advanced Plasma Surface Technology, Sungkyunkwan University) ;
  • Lee, Dong-Bok (Center for Advanced Plasma Surface Technology, Sungkyunkwan University)
  • 심웅식 (성균관대학교 플라즈마 응용 표면기술 연구센터) ;
  • 이동복 (성균관대학교 플라즈마 응용 표면기술 연구센터)
  • Published : 2002.11.01
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Abstract

Alloys of $Fe_3$Al, $Fe_3$Al-6Cr, $Fe_3$Al-4Cr-1Mo, $Ni_3$Al, and $Ni_3$Al-2.8Cr were oxidized at $1000^{\circ}C$ in air, and the oxide scales formed were studied using XRD. SEM, EPMA, and TEM. The oxide scales that formed on $Fe_3$Al-based alloys consisted primarily of $\alpha$-$Al_2$$O_3$ containing a small amount of dissolved Fe and Cr ions, whereas those that formed on $Ni_3$Al-based alloys consisted primarily of $\alpha$-$Al_2$$O_3$, together with a small amount of $NiAl_2$$O_4$, NiO and dissolved Cr ions. For the entire alloys tested, nonadherent oxide scales formed, and voids were inevitably existed at the scale-matrix interface.

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