Densification Behavior and Microstructural Development of Nano-agglomerate Powder during Singering

  • Kang, Yun-Sung (Department of Metallurgy and Materials Science, Hanyang University) ;
  • Cha, Berm-Ha (Department of Metallurgy and Materials Science, Hanyang University) ;
  • Kang, Hyun-Goo (Department of Metallurgy and Materials Science, Hanyang University) ;
  • Lee, Jai-Sung (Department of Metallurgy and Materials Science, Hanyang University)
  • 발행 : 2006.09.24

초록

Densification behavior of nano-agglomerate powder during pressureless sintering of Fe-Ni nanopowder was investigated in terms of diffusion kinetics and microstructural development. To understand the role of agglomerate boundary for sintering process, densification kinetics of Fe-Ni nano-agglomerate powder with different agglomerate size was investigated. It was found that activation energy for densification was lower in the small-sized agglomerate powder. The increase in the volume fraction of inter-agglomerate boundary acting as high diffusion path might be responsible for the enhanced diffusion process.

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