Densification Behavior and Microstructural Development of Nano-Agglomerate Powder during Sintering
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 process 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.
Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim
Y. S. Kang et al., "Densification Behavior and Microstructural Development of Nano-Agglomerate Powder during Sintering ", Materials Science Forum, Vols. 534-536, pp. 505-508, 2007