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

Author:

Kim Ji Soon1,Choi Hyeong Suk1,Dudina Dina V.1,Lee Jeong Keun2,Kwon Young Soon1

Affiliation:

1. Ulsan University

2. Korea Agency for Technology and Standards

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.

Publisher

Trans Tech Publications, Ltd.

Subject

Condensed Matter Physics,General Materials Science,Atomic and Molecular Physics, and Optics

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1. Microstructure and mechanical properties of materials obtained by spark plasma sintering of Ni3Al–Ni powder mixtures;Materials Science and Engineering: A;2020-01

2. Fabrication of the Ni3Al - Zr materials by mechanical activation and spark plasma sintering;PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS WITH HIERARCHICAL STRUCTURE FOR NEW TECHNOLOGIES AND RELIABLE STRUCTURES 2019;2019

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