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Electrically activated reactive synthesis (EARS) and electro-annealing of 3Ni–Al powder compacts

Electrically activated reactive synthesis (EARS) and electro-annealing of 3Ni–Al powder compacts The present study investigates the electrically activated reactive synthesis (EARS) and post-reaction electro-annealing of 3Ni–Al powder compacts. The effect of initial relative green density on EARS processing and on the microstructure and phases produced was investigated. Post-reaction electro-annealing was also conducted to investigate its effects on phase transformations and consolidation. The initial reaction resulted in the formation of Ni3Al as the major phase, with 3R martensite also being formed. The investigated variation in relative green density was found to have limited effect on the product porosity and microstructure. Post-reaction electro-annealing, however, resulted in harder products with unique microstructures, particularly the formation of Ni4.22Al0.9 in very high amounts. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Materials Science Springer Journals

Electrically activated reactive synthesis (EARS) and electro-annealing of 3Ni–Al powder compacts

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Materials Science; Materials Science, general; Characterization and Evaluation of Materials; Polymer Sciences; Continuum Mechanics and Mechanics of Materials; Crystallography and Scattering Methods; Classical Mechanics
ISSN
0022-2461
eISSN
1573-4803
DOI
10.1007/s10853-018-2453-7
Publisher site
See Article on Publisher Site

Abstract

The present study investigates the electrically activated reactive synthesis (EARS) and post-reaction electro-annealing of 3Ni–Al powder compacts. The effect of initial relative green density on EARS processing and on the microstructure and phases produced was investigated. Post-reaction electro-annealing was also conducted to investigate its effects on phase transformations and consolidation. The initial reaction resulted in the formation of Ni3Al as the major phase, with 3R martensite also being formed. The investigated variation in relative green density was found to have limited effect on the product porosity and microstructure. Post-reaction electro-annealing, however, resulted in harder products with unique microstructures, particularly the formation of Ni4.22Al0.9 in very high amounts.

Journal

Journal of Materials ScienceSpringer Journals

Published: May 31, 2018

References