열처리공학회지 (Journal of the Korean Society for Heat Treatment)

  • 제18권6호
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  • Pages.362-368
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  • 2005
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  • 1225-1070(pISSN)
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  • 2508-4046(eISSN)
한국열처리공학회 (The Korean Society for Heat Treatment)
권호 표지

Al-Fe-Mo 합금에서 준결정상의 생성 및 열분해에 관한 연구

Formation and Thermal Decomposition of a Quasicrystalline Phase in Al-Fe-Mo Alloys

  • 김석환 (금오공과대학교 신소재시스템공학부)
  • Kim, Suk Hwan (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)
  • 투고 : 2005.11.14
  • 심사 : 2005.12.30
  • 발행 : 2005.11.30
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초록

Formation and thermal stability of a quasicrystalline phases in Al-Fe-Mo alloys were investigated by means of melt-spinning process and subsequent heat treatment test. Thermal decomposition and phase transformation process of the as-spun alloys were studied using X-ray diffraction and electron microscopy. The melt-spun Al-Fe-Mo alloys contained an icosahedral quasicrystalline phase with a quasilattice constant of 0.457 nm. Icosahedral phase formed at a composition of $Al_{82.5}Fe_{14}Mo_{3.5}$ as a metastable phase during rapid solidification was transformed into the stable crystalline phases, cubic 1/0 approximant and monoclinic ${\lambda}$-phase, upon heating. A metastable icosahedral and cubic(a = 0.93 nm) phases in as-spun $Al_{65}Fe_{20}Mo_{15}$ alloy were decomposed into two cubic(a = 0.62, 0.31 nm) phases by heat treatment.

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