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Effect of high content of nickel and silicon on the microstructure and properties of Cu-Ni-Si alloys
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  • Ping Tao,
  • Ling LU,
  • Hui Xie,
  • Long Zhang,
  • Xin Wei
Ping Tao
Xi'an Aeronautical University
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Ling LU
Xi'an University of Technology
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Hui Xie
Xi'an Aeronautical University
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Long Zhang
Xi'an Aeronautical University
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Xin Wei
Xi'an Aeronautical University
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Abstract

Cu-Ni-Si alloys have been widely applied in electronic and electrical industries.The effect of precipitation on the microstructure and properties of the alloys are still not well understood. In this study, Cu-Ni-Si alloys were prepared by hot-pressed sintering and elemental copper powders, nickel powders and silicon powders as raw materials. The results show that, there were no Ni-Si intermetallic compounds except the δ-Ni2Si phase in the microstructure by hot-pressed sintered preparation of Cu-Ni-Si alloys. And the distribution of the δ-Ni2Si phase in the alloy was more uniform and smaller. After aging treatment, when the mass ratio of Ni and Si were 2:1 and 3:1, the precipitation of δ-Ni2Si phase was significantly less, and when the mass ratio of Ni and Si were 4:1 and 5:1, the precipitation of δ-Ni2Si phase particles increased significantly.The test results by electrical conductivity and vickers hardness show that after ageing treatment, both the electrical conductivity and vickers hardness of the alloys were greatly improved. When the electrical conductivity was 39.33%IACS, the vickers hardness was 230.95HV, and the Cu-Ni-Si alloy had the best comprehensive performance.

Peer review status:UNDER REVIEW

22 Apr 2021Submitted to International Journal of Quantum Chemistry
22 Apr 2021Assigned to Editor
22 Apr 2021Submission Checks Completed
26 Apr 2021Reviewer(s) Assigned