Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Thermal Stability of Al-Fe-X Alloy System Prepared by Mechanical Alloying and Spark Plasma Sintering: II. Al-Fe-Cr and Al-Fe-Mo

기계적 합금화 및 스파크 플라즈마 소결에 의해 제조된 Al-Fe-X계 합금의 열적 안정성: II. Al-Fe-Cr and Al-Fe-Mo

  • 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)
  • 이현권 (금오공과대학교 신소재시스템공학부) ;
  • 이상우 (금오공과대학교 신소재시스템공학부) ;
  • 조경식 (금오공과대학교 신소재시스템공학부)
  • Published : 2005.02.01
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Abstract

Mechanical alloying using high-energy ball mill and subsequent spark plasma sintering (SPS) process was applied to Al-Fe-Cr and Al-Fe-Mo powder mixture to investigate effects of Cr and Mo addition on thermal stability of Al-Fe, and thereby to enhance its thermal stability up to $500^{\circC}$. Various analytical techniques including micro-Vickers hardness test, SEM, TEM, X-ray diffractometry and corrosion test were carried out. It was found that addition of Cr and Mo to Al-Fe system played a role of grain growth inhibitor of matrix Al and some precipitates such as $Al_3Fe$ during SPS and subsequent heat treatment. The inhibition of grain growth resulted in increased Vickers hardness and thermal stability up to $500^{\circC}$ comparing to those of Al-Fe alloy system.

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References

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