Multiphase strengthening mechanism of Cu-Y2O3/W composites prepared by mechanical alloying

Xueyang Sheng; Bing Ma; Laima Luo; Jie Xu; Yoshimitsu Hishinuma; Yuji Wu; Jiaqin Liu; Yucheng Wu

Nuclear Materials and Energy (Jun 2024)

Multiphase strengthening mechanism of Cu-Y2O3/W composites prepared by mechanical alloying

Xueyang Sheng,
Bing Ma,
Laima Luo,
Jie Xu,
Yoshimitsu Hishinuma,
Yuji Wu,
Jiaqin Liu,
Yucheng Wu

Affiliations

Xueyang Sheng: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
Bing Ma: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; Engineering Research Center of High Performance Copper Alloy Materials and Processing, Ministry of Education, Hefei University of Technology, Hefei 230009, China; Corresponding authors at: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China.
Laima Luo: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; Engineering Research Center of High Performance Copper Alloy Materials and Processing, Ministry of Education, Hefei University of Technology, Hefei 230009, China
Jie Xu: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
Yoshimitsu Hishinuma: National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
Yuji Wu: School of Nuclear Engineering, Rocket Force University of Engineering, Xi'an 710025, China
Jiaqin Liu: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; Engineering Research Center of High Performance Copper Alloy Materials and Processing, Ministry of Education, Hefei University of Technology, Hefei 230009, China; Corresponding authors at: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China.
Yucheng Wu: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; Engineering Research Center of High Performance Copper Alloy Materials and Processing, Ministry of Education, Hefei University of Technology, Hefei 230009, China

Journal volume & issue: Vol. 39
p. 101644

Abstract

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To prepare high-performance copper-based composites, Y2O3/W multiphase reinforced copper-based composites were synthesized through mechanical alloying and spark plasma sintering, and the mole ratio of W and Y2O3 was explored. It is found that the incorporation of W inhibited the growth of copper particle during ball milling, and facilitated the refinement of Y2O3. Compared to conditions without W addition, the Y2O3 particle diameter reduced from 97.96 nm to 33.4 nm when same mole W was added. Furthermore, copper grains were refined, resulting in a higher tensile strength of 305 MPa and elongation of 15.6 %. At 400 °C, the 5:5 sample exhibited a higher thermal conductivity of 299 W/(m·K). Nano-scale particles were uniformly distributed within the copper matrix, and the interaction between W and Y2O3 inhibited nanoparticle coarsening, leading to the formation of a more stable Y2WO6 phase during sintering, which is also better for the purification of the copper matrix.

Published in Nuclear Materials and Energy

ISSN: 2352-1791 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-materials-and-energy/

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