4.7 Article

Effect mechanism of mono-particles or hybrid-particles on the thermophysical characteristics and mechanical properties of Cu matrix composites

Journal

CERAMICS INTERNATIONAL
Volume 48, Issue 16, Pages 23033-23043

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2022.04.281

Keywords

Ceramic; metal composites; Mono-particles; Hybrid-particles; Thermal and mechanical characteristics; Finite element modeling

Funding

  1. Scientific Research Project of Jilin Provincial Department of Education [JJKH20211065KJ]
  2. Guangdong Basic and Applied Basic Research Foundation, China [2019A1515110268]
  3. Exploration Foundation of State Key Laboratory of Automotive Simulation and Control [ascl-zytsxm-202015]

Ask authors/readers for more resources

The nature of ceramic particles plays a decisive role in the performance of ceramic/metal composites. This study analyzed the effect of mono-particles and hybrid-particles on the thermal and mechanical characteristics of composites through experiments and finite element analysis. The results showed that the (TiC + TiB2)/Cu composite had higher thermal conductivity and better compression properties, while the TiB2/Cu composite demonstrated excellent wear resistance.
The nature of ceramic particles plays a decisive role in the performance of the ceramic/metal composites. This work is designed to deeply analyze the effect of mono-particles and hybrid-particles on the thermal and mechanical characteristics of the composites by means of experiment and finite element analysis. The in-situ TiB2/ Cu and (TiC + TiB2)/Cu composites were fabricated by reactive hot pressing in Cu-Ti-B and Cu-Ti-B4C reaction systems. The two kinds of composites have similar coefficient of thermal expansion, while the (TiC + TiB2)/Cu composite demonstrates higher thermal conductivity and better compression properties than the TiB2/Cu composite. Simulations suggest that the spherical TiC particles in the (TiC + TiB2)/Cu composite optimize the heat transfer path and improve the stress distribution and plastic deformation, which are the main reasons for the difference in composite properties. Besides, the TiB2/Cu composite demonstrates excellent wear resistance due to the pinning effect of the hexagonal columnar particles. This would help deepen the understanding of the strengthening mechanism of mono-particles or hybrid-particles ceramic reinforced metal matrix composites and have a significant guiding role in the microstructure design and synergy optimization of composite.

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