대한금속재료학회지 (Korean Journal of Metals and Materials)

  • 제46권6호
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  • Pages.338-344
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  • 2008
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  • 1738-8228(pISSN)
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  • 2288-8241(eISSN)
대한금속재료학회 (The Korean Institute of Metals and Materials)
권호 표지

Cu-Zr-Al-Be 비정질합금의 결정화거동 및 속도론

Crystallization Behavior and Kinetics of Cu-Zr-Al-Be Bulk Metallic Glass

  • 김유찬 (한국과학기술연구원 재료기술연구본부) ;
  • 에릭플러리 (한국과학기술연구원 재료기술연구본부) ;
  • 석현광 (한국과학기술연구원 재료기술연구본부) ;
  • 차필령 (국민대학교 신소재공학부) ;
  • 이진규 (한국생산기술연구원 신소재본부) ;
  • 이재철 (고려대학교 신소재공학과)
  • Kim, Yu-Chan (Division of Materials Science and Engineering, Korea Institute of Science and Technology) ;
  • Fleury, Eric (Division of Materials Science and Engineering, Korea Institute of Science and Technology) ;
  • Seok, Hyun-Kwang (Division of Materials Science and Engineering, Korea Institute of Science and Technology) ;
  • Cha, Pil-Ryung (Division of Materials Science and Engineering, Kookmin University) ;
  • Lee, Jin-Kyu (Division of Materials Science and Engineering, Kookmin University) ;
  • Lee, Jae-Chul (Advanced Material Division, Korea Institute of Industrial Technology)
  • 투고 : 2008.02.28
  • 발행 : 2008.06.22
⟨ 이전 논문 다음 논문 ⟩

초록

The crystallization kinetics of the $Cu_{43}Zr_{43}Al_7Be_7$ bulk metallic glass were studied by differential scanning calorimetry(DSC) in the continuous heating and isothermal annealing modes. Only one major peak could be detected on the DSC traces of $Cu_{43}Zr_{43}Al_7Be_7$ bulk amorphous alloy, and the activation energy for crystallization corresponding to the peak determined by the Kissinger method was resulted of 239 kJ/mol. The isothermal kinetic, analyzed by the Johnson-Mehl-Avrami equation yielded values for the Avrami exponents in the range 1.69 to 2.37, which implied a crystallization governed by a three-dimensioned growth. Primary phases were essentially the cubic structure CuZr together with the $Cu_{10}Zr_7$ phase. At higher temperature, the CuZr disappeared while the $Cu_{10}Zr_7$ became predominant. After long term annealing at 731 K, the phases were $Cu_{10}Zr_7$, $Cu_2ZrAl$ and $Al_3Zr_5$.

키워드

과제정보

연구 과제 주관 기관 : 과학기술부

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