Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effect of Mo and Nb on High Temperature Oxidation of TiAl Alloys

Mo, Nb첨가가 TiAl합금의 산화에 미치는 영향

  • Kim Jae-Woon (Center for Advanced Plasma Surface Technology, Sungkyunkwan University) ;
  • Lee Dong-Bok (Center for Advanced Plasma Surface Technology, Sungkyunkwan University)
  • 김재운 (성균관대학교 플라즈마 응용 표면기술 연구센터) ;
  • 이동복 (성균관대학교 플라즈마 응용 표면기술 연구센터)
  • Published : 2004.09.01
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Abstract

Alloys of $Ti46\%Al-2\%Mo-2\%Nb$ were oxidized between 800 and $1000^{\circ}C$ in air, and their oxidation characteristics were studied. The alloys displayed good oxidation resistance due mainly to the beneficial effects of Mo and Nb. The oxide scales formed consisted primarily of an outer $TiO_2$ layer, an intermediate $Al_{2}O_3-rich$ layer, and an inner mixed layer of ($TiO_{2}+Al_{2}O_3$). Molybdenum and niobium dissolved in the scale effectively improved oxidation resistance. They were mainly distributed in the inner mixed layer of ($TiO_{2}+Al_{2}O_3$).

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References

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