Multiple strengthening mechanisms in nanoparticle-reinforced copper matrix composites

Bulletin of Materials Science

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

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

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.

【 授权许可】

CC BY