Spark Plasma Sintering of Nanoscale (Ni+Al) Powder Mixture

Ji Soon Kim; Hyeong Suk Choi; Dina V. Dudina; Jeong Keun Lee; Young Soon Kwon

doi:10.4028/www.scientific.net/SSP.119.35

Paper Titles

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Synthesis of CdS Nanocrystallites in Polymer Matrix: Sui-Generis Approach
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Nanostructured Thin films of Anthracene by Liquid-Liquid Interface Recrystallization Technique
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Spark Plasma Sintering of Nanoscale (Ni+Al) Powder Mixture
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Comparison of Optical Properties of Pyrazoline Derivative Nanoparticles
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Characterization of Nano Scaled Mullite Powders Prepared by Organic-Inorganic Solution Technique
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Preparation and Characterization of Anti-Fogging Low Density Polymer Film
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Ion Conducting Behaviors of Polymeric Composite Electrolytes Containing Mesoporous Silicates
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Spark Plasma Sintering of Nanoscale (Ni+Al) Powder Mixture

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.