| METALS AND METAL MATRIX COMPOSITES |
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| Study on the Properties of Cu0.81Ni0.19 Alloy Synthesized by Electrical Discharge Method |
| WEI Yazhou1,2, LIU Yifan3, LI Xianglong1,2,*
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1 School of Mechanical Engineering, Sichuan University, Chengdu 610065, China
2 Innovation Method and Creative Design Key Laboratory of Sichuan Province, Chengdu 610065, China
3 School of Materials and Energy, University of Electronic Science and Technology, Chengdu 611731, China |
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Abstract Micro Cu-Ni alloy powders are widely used in microelectronic components, aerospace and powder metallurgy because of their excellent electrical conductivity, corrosion resistance and magnetic properties. In this study, copper-nickel alloys with Cu0.81Ni0.19 as the main crystalline phase were successfully prepared based on the electrical discharge corrosion method by tuning the current parameters. The results show that during the atomic crystallization process, Ni as a solute atom occupies the part of the nodal position of Cu atom and then the solid solution reaction occurs to generated the Cu0.81Ni0.19 alloy phase. The alloy has a face-centered cubic (FCC) crystal structure with smooth surface and uniform dispersion, and most of the particles show a spherical or sphere-like shape. When the current increases, the content of Cu element increases and the content of Ni element decreases. The particle size analysis shows that the particle size distribution of the alloy powder ranged from 0.12 μm to 92.57 μm, and the average particle size increased with the increase of current intensity, which indicates that the increase of current helps to produce alloy particles with large size for the micron scale range. The average particle size (D50) of the alloy powder was 13.94 μm when the current was 36 A, at this time, the saturation magnetization strength and coercivity of the alloys were 26.21 emu/g and 52.97 Oe, respectively, the sample exhibited excellent soft magnetic properties and the better magnetic properties of the alloy powder with the increase of current.
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Published: 10 May 2023
Online: 2023-05-04
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| Fund:National Natural Science Foundation of China (51275324),and Special Work on Innovative Methods of Ministry of Science and Technology (2017IM010700). |
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2023, Vol. 37 
