The electroimpact compaction of powders: Mechanics, structure and properties

Abstract

An electroimpact compaction method recently developed for powder consolidation is described in terms of the basic principles of electric discharge and dynamic compaction processes. The influence of processing parameters, microstructural characteristics and mechanical properties of preforms obtained are discussed. Mathematical models for the mechanics of compaction, electrical resistance, discharge current variations and comparisons with experimental results are presented. The best set of properties are obtained when electrical discharge is applied to cause interparticle fusion at the instant when dynamic compaction pressure attains its peak level. © 1993, Taylor & Francis Group, LLC. All rights reserved.