Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Study on the effect of vacuum fusion infiltration technology on the properties of tungsten/copper joining interface

  • Hao-Jie Zhang (College of Mechanical Engineering, Zhejiang University of Technology) ;
  • Xue-qin Tian (College of Mechanical Engineering, Zhejiang University of Technology) ;
  • Xiao-Yu Ding (College of Mechanical Engineering, Zhejiang University of Technology) ;
  • Hui-Yun Zheng (College of Mechanical Engineering, Zhejiang University of Technology) ;
  • Lai-Ma Luo (School of Materials Science and Engineering, Hefei University of Technology) ;
  • Yu-Cheng Wu (School of Materials Science and Engineering, Hefei University of Technology) ;
  • Jian-Hua Yao (College of Mechanical Engineering, Zhejiang University of Technology)
  • Received : 2023.09.14
  • Accepted : 2024.01.29
  • Published : 2024.06.25
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Abstract

In this paper, based on the need for high-strength connections between all-tungsten-oriented plasma materials and thermal sinking materials of copper and its alloys in nuclear fusion devices, a study on the effect of tungsten surface laser micro structuring on the interfacial bonding properties of W/Cu joints was carried out. In the experiment, the connectors were prepared by vacuum fusion infiltration technology, and the effects of microgroove structure on the mechanical and thermal conductivity of W/Cu connectors were investigated under different parameters (including microgroove pitch, microgroove depth, and microgroove taper). The maximum shear strength is 126.0 MPa when the pitch is 0.15 mm and the depth is 34 ㎛. In addition, the negative taper structure, i.e., the width of the entrance of the microstructure is smaller than the width of the interior of the microstructure, is also investigated. The shear tests show that there is an approximately linear relationship between the shear strength of W/Cu and taper. Compared with the positive taper, the shear strength of the samples with the same morphological density and depth of the tungsten surface is significantly higher.

Keywords

Acknowledgement

The authors thank the support of National MCF Energy R&D Program (Grant No. 2022YFE03140000) and Zhejiang Province "Jianbing" R&D Program for Tackling New Problems (Grant No. 2022C03021).

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