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


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.


Microstructure Welding Recrystallization Bond Strength NiAl 
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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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