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

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Mechanical Properties of Al-Si Composite Powders produced by Gas Atomization Process

  • Kim Jin-Chun (Nanopowder Materials Group, Materials Technology Department Korea Institute of Machinery and Materials) ;
  • Wang Li-Fe (Nanopowder Materials Group, Materials Technology Department Korea Institute of Machinery and Materials) ;
  • Chung In-Sang (Department of Metallurgucal Engineering, Kyungpook National University) ;
  • Kim Yong-Jin (Nanopowder Materials Group, Materials Technology Department Korea Institute of Machinery and Materials)
  • Published : 2004.11.01
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Abstract

The microstructure and mechanical properties of the hypereutectic prealloyed Al-Si powders prepared by the gas atomization process were described in this paper. With increasing the gas pressure of the atomization, the average powder size was decreased from about $145{\mu}m\;to\;80{\mu}m$. The primary eutectic Si particles were uniformly distributed in the Al matrix and their size varied in the range of $8-10{\mu}m$. The high densified specimens with above 96% of the theoretical density were fabricated the hot pressing process. The UTS mechanical properties of VN1 specimens were much higher than that of conventional hypoeutectic Al-Si alloys.

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