Field-assisted sintering of Ni nanopowders

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...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2004-11, Vol.385 (1), p.367-371
Main Authors: Kodash, V.Y., Groza, J.R., Cho, K.C., Klotz, B.R., Dowding, R.J.
Format: Article
Language:English
Subjects:
Cracks
Densification
Grain
Nanopowder
Sintering
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Summary: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.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2004.06.075