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Effect of molybdenum particles on thermal and mechanical properties of graphite flake/copper composites.

Authors :
Cui, Qianyue
Chen, Cunguang
Yu, Chengwei
Lu, Tianxing
Long, Haiming
Yan, Shuhao
Volinsky, Alex A.
Hao, Junjie
Source :
Carbon. May2020, Vol. 161, p169-180. 12p.
Publication Year :
2020

Abstract

Graphite flakes (GFs) in the GF/Cu composites generally fail to exert the advantage of the negative coefficient of thermal expansion (CTE) on account of the weak interfacial bonding between GFs and Cu. In this work, a rivet-joint strategy is adopted to surmount the dilemma. By introducing submicron Mo particles into the Cu matrix through the chemical synthesis process, various GF/Cu composites with the improved alignment of GFs via the method of tape-casting and hot-pressing sintering have been prepared. Due to the combined effects of Mo particle strengthened Cu and the rivet-joint interfacial architecture deriving from the in-situ synthesized Mo x C, optimized thermal/mechanical properties of GF/Cu–Mo composites have been achieved. The 50 v o l % GF/Cu composite with 1 w t % Mo shows the in-plane thermal conductivity of 598 W ⋅ m − 1 ⋅ K − 1 and the through-plane CTE of −2.92 × 10 − 6 K − 1 (25–100 ∘C). Simultaneously, the bending strength is 40 % higher than the 50 v o l % GF/Cu composite. This strategy could promote the development of composites with improved combined structural and functional properties. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00086223
Volume :
161
Database :
Academic Search Index
Journal :
Carbon
Publication Type :
Academic Journal
Accession number :
142578902
Full Text :
https://doi.org/10.1016/j.carbon.2020.01.059