한국분말재료학회지 (Journal of Powder Materials)

  • 제12권1호
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  • Pages.70-78
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  • 2005
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
권호 표지
DOI QR코드

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기계적 합금화 및 스파크 플라즈마 소결에 의해 제조된 Al-Fe-X계 합금의 열적 안정성: I. Al-Fe

Thermal Stability of Al-Fe-X Alloy System Prepared by Mechanical Alloying and Spark Plasma Sintering: I. Al-Fe

  • 이현권 (금오공과대학교 신소재시스템공학부) ;
  • 이상우 (금오공과대학교 신소재시스템공학부) ;
  • 조경식 (금오공과대학교 신소재시스템공학부)
  • Lee, Hyun-Kwuon (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology) ;
  • Lee, Sang-Woo (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology) ;
  • Cho, Kyeong-Sik (School of Advanced Materials and System Engineering, Kumoh National Institute of Technology)
  • 발행 : 2005.02.01
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초록

Mechanical alloying using high-energy ball mill and subsequent spark plasma sintering (SPS) process was applied to understand mechanical alloying processing of Al-Fe alloy system. The thermal stability of mechanically alloyed Al-Fe alloy was intended to be enhanced by SPS process. Various analytical techniques including particle size analysis, density measurement, micro-Vickers hardness test, SEM, TEM, and X-ray diffractometry were adopted to find optimum processing conditions for mechanical alloying and subsequent SPS and to estimate thermal stability of the prepared alloy. It was found from the treatment of mechanically alloyed Al-8wt.%Fe powder mixture that needle-shaped $Al_3Fe$ precipitates was formed in the Al-Fe matrix, and the alloy compact showed enhanced densification and reached its full density with little loss of its fine microstructure. After heat treatment at $500^{\circC}$, it was also shown that the thermal stability of Al-8wt.%Fe alloy fabricated in the present study was enhanced, which was due to its fine microstructure developed by fast densification of SPS.

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