Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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A New Cu-Hf-Al-Be Bulk Amorphous Alloy with High Glass Forming Ability

우수한 비정질 형성능을 가지는 Cu-Hf-Al-Be 4원계 벌크 비정질 합금

  • Shin, Sang-Soo (Green Technology Center, Korea Institute of Industrial Technology) ;
  • Lim, Kyoung-Mook (Green Technology Center, Korea Institute of Industrial Technology) ;
  • Kim, Seong-Nyeong (Dept. Metallurgy and Ceramics Science, Tokyo Institute of Technology) ;
  • Kim, Eok-Soo (Green Technology Center, Korea Institute of Industrial Technology)
  • 신상수 (한국생산기술연구원 친환경청정기술센터) ;
  • 임경묵 (한국생산기술연구원 친환경청정기술센터) ;
  • 김성녕 (동경공업대 이공학연구과) ;
  • 김억수 (한국생산기술연구원 친환경청정기술센터)
  • Received : 2011.02.21
  • Accepted : 2011.06.29
  • Published : 2011.08.30
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Abstract

A new Cu-Hf-Al-Be monolithic bulk amorphous alloy was developed utilizing minimal use of toxic and expensive Be. The developed alloy exhibits a large glass forming ability (GFA) (${\Phi}8$ mm). The possible mechanisms underlying the enhancement of the glass forming ability by this alloy are discussed based on the dimensionless parameter ${\gamma}$. In addition, alloy design strategy for the improvement of GFA is proposed in the viewpoint of heat of mixing (${\Delta}H_{mix}$)difference and atomic packing state.

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References

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