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Field-assisted sintering of Ni nanopowders

  • Author(s): Kodash, V.Y.
  • Groza, J.R.
  • Cho, K.C.
  • Klotz, B.R.
  • Dowding, R.J.
  • et al.
Abstract

Ni nanopowders were sintered by a field-assisted sintering technique (FAST). The influence of heating rate from 90 to 1100 ◦C/min on densification and final grain structure of sintered Ni was studied. A moderate heating rate was found to be beneficial for the densification of Ni nanopowders, whereas a high heating rate was conducive to a lower final density. Very high heating rates resulted in non-uniform densification of the samples and formation of cracks during sintering. Electric field activation and possible densification mechanisms are discussed.

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