Full density graphite/copper-alloy matrix composite fabricated via hot powder forging for pantograph slide

Man Wang; Meng Li; Ke Jiang; Enze Xu; Junwu Liu; Honghai Zhong; Yang Jiang

doi:10.1088/2053-1591/ac045d

Materials Research Express (Jan 2021)

Full density graphite/copper-alloy matrix composite fabricated via hot powder forging for pantograph slide

Man Wang,
Meng Li,
Ke Jiang,
Enze Xu,
Junwu Liu,
Honghai Zhong,
Yang Jiang

Affiliations

Man Wang: School of Materials Science and Engineering, and Engineering Research Center of High-Performance Copper Alloy Materials and Processing of Ministry of Education, Hefei University of Technology , Hefei 230009, People’s Republic of China
Meng Li: School of Materials Science and Engineering, and Engineering Research Center of High-Performance Copper Alloy Materials and Processing of Ministry of Education, Hefei University of Technology , Hefei 230009, People’s Republic of China
Ke Jiang: School of Materials Science and Engineering, and Engineering Research Center of High-Performance Copper Alloy Materials and Processing of Ministry of Education, Hefei University of Technology , Hefei 230009, People’s Republic of China
Enze Xu: School of Materials Science and Engineering, and Engineering Research Center of High-Performance Copper Alloy Materials and Processing of Ministry of Education, Hefei University of Technology , Hefei 230009, People’s Republic of China
Junwu Liu: School of Materials Science and Engineering, and Engineering Research Center of High-Performance Copper Alloy Materials and Processing of Ministry of Education, Hefei University of Technology , Hefei 230009, People’s Republic of China
Honghai Zhong: School of Materials Science and Engineering, and Engineering Research Center of High-Performance Copper Alloy Materials and Processing of Ministry of Education, Hefei University of Technology , Hefei 230009, People’s Republic of China
Yang Jiang: ORCiD; School of Materials Science and Engineering, and Engineering Research Center of High-Performance Copper Alloy Materials and Processing of Ministry of Education, Hefei University of Technology , Hefei 230009, People’s Republic of China

DOI: https://doi.org/10.1088/2053-1591/ac045d
Journal volume & issue: Vol. 8, no. 6
p. 066504

Abstract

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High-performance copper-based pantograph slide materials play a crucial role in the rapid development of modern urban rail transit urgently. Herein, a full density graphite/copper-alloy matrix composite for pantograph slide has been successfully obtained by the hot powder forging process. The composite exhibits the full density when forging energy density is 307.6 J cm ^−3 . In addition, the influence of different aging treatments on microstructure and mechanical performances of the composite has been studied in detail. The hardness and resistivity of the forged materials are greatly improved after an optimum aging treatment. Simultaneously, the friction and wear performances with or without currency current have been investigated, which demonstrates the friction coefficient can reach the minimum of 0.109 under 35 N. In current-carrying friction, the wear rate of the composite is an extremely small value of 5.5 × 10 ^–5 mg m ^−1 after the aging treatment, indicating the outstanding anti-friction and self-lubricating performance. All the comprehensive analyses illustrate the full density graphite/copper-alloy matrix composite with excellent mechanical shows an enormous potential for pantograph slide.

Published in Materials Research Express

ISSN: 2053-1591 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials; Technology: Chemical technology
Website: https://iopscience.iop.org/journal/2053-1591

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