Synergistic enhancing effect for mechanical and electrical properties of tungsten copper composites using spark plasma infiltrating sintering of copper-coated graphene

Chen, Wenge, Dong, Longlong, Wang, Jiaojiao, Zuo, Ying, Ren, Shuxin and Fu, Yong Qing (2017) Synergistic enhancing effect for mechanical and electrical properties of tungsten copper composites using spark plasma infiltrating sintering of copper-coated graphene. Scientific Reports, 7. p. 17836. ISSN 2045-2322

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Official URL: http://doi.org/10.1038/s41598-017-18114-2

Abstract

Successful applications of WCu alloys in high voltage electrical switches require their high strength and excellent conductivity. Unfortunately, the strategies for increasing their strength such as doping with fine particles and alloying often significantly decrease their conductivity. In this paper, we developed a new pathway for fabricating WCu alloys using spark plasma infiltrating sintering of copper-coated graphene (Cu@Gr) composite powders. Cu@Gr was found to partially prevent the formation of WC after sintering, and graphene was uniformly distributed on the surfaces of network Cu phases. Electrical conductivity of 38.512 M·S/m, thermal conductivity of 264 W·m−1·K−1 and microhardness of 278 HV were achieved for the sintered WCu composites doped with only 0.8 wt.% Cu@Gr powders, which showed 95.3%, 24.3%, 28% enhancement compared with those from the conventional sintering using the undoped WCu powders.

Item Type: Article
Uncontrolled Keywords: WCu alloys, graphene, electrical properties, infiltrating, spark plasma sintering
Subjects: F200 Materials Science
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 07 Dec 2017 14:50
Last Modified: 23 Apr 2018 02:54
URI: http://nrl.northumbria.ac.uk/id/eprint/32756

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