Spark Plasma Sintering of Nanoscale (Ni+Al) Powder Mixture |
| Journal |
Solid State Phenomena (Volume 119) |
| Volume |
Nanocomposites and Nanoporous Materials VII |
| Edited by |
Chang Kyu Rhee |
| Pages |
35-38 |
| DOI |
10.4028/www.scientific.net/SSP.119.35 |
| Online since |
January, 2007 |
| Authors |
Ji Soon Kim,
Hyeong Suk Choi,
Dina V. Dudina,
Jeong Keun Lee,
Young Soon Kwon
|
| Keywords |
Microstructure, Nanopowder, Nickel Aluminides, Spark Plasma Sintering (SPS) |
| Abstract |
An attempt was made to produce nickel aluminides with fine microstructure from
nanoscale nickel and aluminum powders produced by wire electric explosion (WEE). The powders
were mixed and spark plasma sintered (SPS) for simultaneous reaction and densification of the
material. Various mixing methods were tested to give the best homogeneity of the nanopowders
mixtures. Utrasonic pre-treatment of the powders did not result in any positive effect on mixing
homogeneity. Sintered compact contained NiAl and Ni3Al phases, showed fine grain size and
unexpectedly high hardness possibly due to the presence of aluminum oxide in the starting
nanopowders. |
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