Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Fabrication of Gradient Porous Al-Cu Sintered Body

경사 다공성 Al-Cu 소결체의 제조

  • Byun, Jong-Min (Division of Materials Science and Engineering, Hanyang University) ;
  • Kim, Se-Hoon (Division of Materials Science and Engineering, Hanyang University) ;
  • Kim, Jin-Woo (Division of Materials Science and Engineering, Hanyang University) ;
  • Kim, Young-Moon (Division of Materials Science and Engineering, Hanyang University) ;
  • Kim, Young-Do (Division of Materials Science and Engineering, Hanyang University)
  • Received : 2011.06.07
  • Accepted : 2011.07.20
  • Published : 2011.08.28
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Abstract

In this study, gradient porous Al-Cu sintered body was fabricated by powder metallurgy processing. Al-Cu powder mixtures were prepared by low energy ball milling with various milling time. After ball milling for 3h, the shape of powder mixtures changed to spherical type with size of 100~500 ${\mu}m$. Subsequently, Al-Cu powder mixtures were classified (under 150, 150~300 and over 300 ${\mu}m$) and compacted (20, 50 and 100 MPa). Then, they were sintered at $600^{\circ}C$ for various holding time (10, 30, 60 and 120 min) in $N_2$ atmosphere. The sintered bodies had 32~45% of porosity. As a result, the optimum holding time was determined to be 60 min at $600^{\circ}C$ and sintered bodies with various porosity were obtained by controlling the compacting pressure.

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