Improved strength and conductivity of metallic-glass-reinforced nanocrystalline CuCrZr alloy

Weizong Bao; Jie Chen; Xinxin Yang; Tao Xiang; Zeyun Cai; Guoqiang Xie

Materials & Design (Feb 2022)

Improved strength and conductivity of metallic-glass-reinforced nanocrystalline CuCrZr alloy

Weizong Bao,
Jie Chen,
Xinxin Yang,
Tao Xiang,
Zeyun Cai,
Guoqiang Xie

Affiliations

Weizong Bao: School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
Jie Chen: School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
Xinxin Yang: School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
Tao Xiang: School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
Zeyun Cai: School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
Guoqiang Xie: School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China; State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China; Corresponding author at: School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.

Journal volume & issue: Vol. 214
p. 110420

Abstract

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Metallic glass (MG)-particle-reinforced nanocrystalline CuCrZr alloys with ultrahigh strengths and good conductivities are designed and synthesized via mechanical milling and spark plasma sintering (SPS). The particle morphology and dispersion state of the CuZrAl MG reinforcement in the CuCrZr alloy matrix are optimized by regulating the milling time of the composite powders prior to SPS consolidation. Outstanding properties are achieved by 5 h and 10 h milling processes with ultimate compressive strengths of 1099 ± 33 and 1185 ± 29 MPa and high conductivities of 29.9 ± 0.8% IACS and 25.2 ± 0.6% IACS, respectively. According to the quantified results of strengthening and conductivity mechanisms, MG reinforcements and ultrafine grains are responsible for the balance of superior strength and conductivity of the composites.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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