电火花放电法合成Cu0.81Ni0.19合金的性能研究  

Study on the Properties of Cu0.81Ni0.19 Alloy Synthesized by Electrical Discharge Method

作　　者：魏亚洲 刘一凡 李翔龙[1,2] WEI Yazhou;LIU Yifan;LI Xianglong(School of Mechanical Engineering,Sichuan University,Chengdu 610065,China;Innovation Method and Creative Design Key Laboratory of Sichuan Province,Chengdu 610065,China;School of Materials and Energy,University of Electronic Science and Technology,Chengdu 611731,China)

机构地区：[1]四川大学机械工程学院,成都610065 [2]创新方法与创新设计四川省重点实验室,成都610065 [3]电子科技大学材料与能源学院,成都611731

出　　处：《材料导报》2023年第9期148-153,共6页Materials Reports

基　　金：国家自然科学基金(51275324);科技部创新方法工作专项(2017IM010700)。

摘　　要：微米Cu-Ni合金粉体因具有优异的导电性、耐腐蚀性和磁学性能而被广泛应用于微电子元器件、航空航天以及粉末冶金等领域。本研究基于电火花放电腐蚀法,通过调控电流参数成功制备出以Cu0.81Ni0.19为主要晶相的铜镍合金。采用XRD、SEM、EDS等技术对合金粉体进行了相关性能表征分析,结果表明:在原子结晶过程中,Ni作为溶质原子占据Cu原子部分结点位置后发生固溶反应,生成了Cu0.81Ni0.19合金相,该合金为面心立方(FCC)晶体结构,表面光滑,分散均匀,大部分颗粒呈现出球形或类球形,电流增大时,Cu含量增加,Ni含量减小。粒度分析数据表明,合金粉体的粒度分布区间为0.12~92.57μm,且随着电流强度的增大,平均粒径增大,说明在微米尺度范围内电流的增大有助于产生粒度较大的合金颗粒,当电流为36 A时,合金粉体的平均粒径(D50)为13.94μm,此时,合金粉体的饱和磁化强度和矫顽力分别为26.21 emu/g、52.97 Oe,材料表现出优异的软磁性能,且电流越大,合金粉体的磁学性能越优异。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.

关 键 词：电火花放电 铜镍合金 晶体结构 粒度分布 软磁性 

分 类 号：TG146.11[一般工业技术—材料科学与工程]