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Journal of Materials Science

, Volume 29, Issue 23, pp 6221–6226 | Cite as

The microstructure and interface behaviour of Ni/NiAl composites produced by the explosive compaction of powders

  • J. Bystrzycki
  • J. Paszula
  • R. Trebinski
  • R. A. Varin
Article

Abstract

Explosive compaction of Ni and NiAl powders was utilized for the processing of Ni/NiAl metal-matrix composites containing up to 57 vol% NiAl particulate. The microstructure, the Vickers microhardness and the Ni/NiAl interfacial bonding strength were studied. The resulting microstructure had a very low volume fraction of porosity (∼ 1 vol%) except for the melting zone formed in the upper portion of a cylindrical specimen. NiAl particles underwent welding during explosive compaction; this was particularly pronounced at the highest volume fractions of NiAl. The lowest microhardness of the Ni matrix was observed in the central portion of a cylindrical specimen. Other parts of the matrix were heavily cold-worked, indicating that a recrystallization had occurred in the centre. NiAl particles were also highly cold-worked regardless of their volume fraction in the composite. The Ni/NiAl interfacial bond strength, measured by the indentation debonding technique, was highest in a composite containing 57 vol% of NiAl particulate.

Keywords

Microstructure Welding Recrystallization Bond Strength NiAl 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • J. Bystrzycki
    • 1
  • J. Paszula
    • 1
  • R. Trebinski
    • 1
  • R. A. Varin
    • 2
  1. 1.Department of Metallurgy and Metal Technology, Faculty of Chemistry and Technical PhysicsMilitary University of TechnologyWarsawPoland
  2. 2.Department of Mechanical EngineeringUniversity of WaterlooWaterlooCanada

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