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    • Keywords


      Metal–matrix composites (MMCs); nanoparticles; hardness testing; microstructural characterization.

    • Abstract


      The multiple hardening mechanisms of a copper matrix have been presented and discussed. The prealloyed ball milled Cu–3 wt.%Al and the atomized Cu–0.6 wt.%Ti–2.5 wt.%TiB2 powders have been used as starting materials. Dispersoid particles Al2O3 and TiB2 were formed in situ. The powders have been hot consolidated. Optical microscopy, SEM, TEM, and X-ray diffraction analysis were performed for microstructural characterization. Increase in microhardness of Cu–3 wt.%Al compacts is a consequence of the crystallite size refinement and the presence of Al2O3 particles. High hardening of Cu–0.6 wt.%Ti–2.5 wt.%TiB2 is a consequence of the presence of modular structure, Cu4Ti$_{(m)}$, and TiB2 particles.

    • Author Affiliations


      D Bozic1 J Stasic1 B Dimcic1 M Vilotijevic1 V Rajkovic1

      1. Institute of Nuclear Sciences “Vinca”, University of Belgrade, 11001 Belgrade, Serbia
    • Dates

  • Bulletin of Materials Science | News

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