Ti-15Mo-5Zr-3Al 합금의 고온산화

High Temperature Oxidation of Ti-15Mo-5Zr-3Al Alloy

  • 우지호 (성균관대학교 금속공학과) ;
  • 김종성 (성균관대학교 금속공학과) ;
  • 백종현 (한국가스공사 연구원) ;
  • 이동복 (성균관대학교 금속공학과)
  • 발행 : 1998.10.01

초록

Alloys of Ti-15Mo-5Zr-3Al(wt%) were oxidized in air between 700 and $900^{\circ}C$. It was found that the oxidation resistance is much better than that of either commercially available pure Ti-6Al-4V(wt%) alloys. The oxide scales were primarily composed of thick Ti-ox-ides which were formed by the inward diffusion of oxygen from the atmosphere. At higher temperatures a thin $\alpha$-$Al_2O_3$ layer was formed on Ti-oxides owing to the outward diffusion of Al from the base alloys. Molybdenum, the noblest metal among the alloy components, was predominantly present behind the oxide-substrate interface. Zirconium, an oxygen active metal, was present at both the oxide layer and the substrate.

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