한국분말야금학회:학술대회논문집 (Proceedings of the Korean Powder Metallurgy Institute Conference)

한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
권호 표지

Investigation on the Sintering Behavior of P/M Al-Zn-Mg-Cu Alloy

  • Shahmohammadi, M. (Department of Materials Science and Engineering, Sharif University of Technology) ;
  • Simchi, A. (Department of Materials Science and Engineering, Sharif University of Technology) ;
  • Danninger, H. (Institute of Chemical Technologies and Analytics, Vienna University of Technology) ;
  • Arvand, A. (Mashhad Powder Metallurgy Co.)
  • 발행 : 2006.09.24
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

In the present work, the sintering behavior of high strength Al-5.6Zn-2.5Mg-1.6Cu (in wt.%) alloy compacts prepared from elemental powders was investigated. Microstructural evaluation was accompanied by XRD and DSC methods in order to determine the temperature and chemical composition of the liquid phases formed during sintering. It was found that three transient liquid phases are formed at 420, 439 and 450 $^{\circ}C$. Microstructural study revealed the progressive formation of sintered contacts due to the presence of the liquid phases, although the green compact expands as a result of the melt penetration along the grain boundaries. While Zn melts at ${\sim}420\;^{\circ}C$, the intermetallic phases formed between Al and Mg were found to be responsible for the formation of liquid phase and the dimensional change at higher temperatures.

키워드