Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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A study on Sintering Characteristics of Commercial 7xxx Series Al Alloy Powders

상용 7xxx Series Al 합금계 혼합분말의 소결 특성

  • ;
  • ;
  • ;
  • Panyu (Harbin Institute of Technology) ;
  • ;
  • 공민석 (한양대학교 신소재공학부) ;
  • 배이태 (한양대학교 신소재공학부) ;
  • 민경호 (한양대학교 신소재공학부) ;
  • ;
  • 장시영 (한국항공대학교 항공재료공학과) ;
  • 김영도 (한양대학교 신소재공학부)
  • Published : 2004.02.01
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Abstract

The sintering characteristics of commercial 7xxx series Al-Zn-Mg-Cu alloy have been investigated. Sintering system of this blended elemental powder has aspects of both transient and supersolidus liquid phase sintering. Transient liquids occur when the constitution point during sintering lies in a solid phase region but where the sintering temperature is greater than either the melting point of one of the constituent or a eutectic temperature. Supersolidus liquid phase sintering occurs when a preblended powder is heated to a temperature between the solidus and liquids. However, these reaction were restrained their inter diffusion due to the appearance of the oxide film. Thus, 7xxx series Al alloy is extremely sensitive to process variables, including particle size, holding time and sintering temperature. Therefore, above phenomenons were observed formation and behaviour of the liquid by using SEM and DSC.

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