Exploring the size effects of Al4C3 on the mechanical properties and thermal behaviors of Al-based composites reinforced by SiC and carbon nanotubes

By B. Guo, Biao Chen, Xinming Zhang, Xi Cen, Xinhua Wang, M. Song, S. Ni, J. Yi, Tao Shen, Yong Du. Carbon, 2018

204 citations recorded by the source corpus.

Abstract In this work, the effects of aluminum carbide (Al4C3) on the mechanical properties and thermal behaviors of Al based composites reinforced by SiC and carbon nanotubes (CNTs) were investigated. The formation of Al4C3 was precisely controlled in the temperature range from 530 °C to 630 °C (80%–95% of the Al melting point) during the post heat treatment. Microscopy observations revealed that Al4C3 rods are originated from CNTs instead of SiC particles. Quantity and size of Al4C3 are highly dependent on the heat treatment temperature. It was found that the mechanical properties of the Al based composites were significantly affected by the size of Al4C3. Moreover, the formation of Al4C3 helps to decrease the coefficient of thermal expansion (CTE) of the composites due to the consumption of Al and the enhanced interfacial bonding. This study provides a potential approach for ameliorating the mechanical and thermal performances of CNTs reinforced metal matrix composites.

Subfields: Ceramics and Composites, Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/ac1989e214896a04a06f33170a65843ca7809d09

Citations in the corpus

• Progress in research on hybrid metal matrix composites (2020, unknown): “Guo et al. [107] investigated the effects of post heat treatment on mechanical and thermal properties of hybrid SiC and CNTs reinforced Al matrix composites, and the results revealed that Al 4 C 3 can be formed between CNTs and Al matrix during heat treatment, leading to a decrease in the CTE and…”