不同功率超声辅助电火花放电制备Cu-Ni合金粉体的微观结构和粒径分布  

Microstructure and Particle Size Distribution of Cu-Ni Alloy Powder Prepared by Different Power Ultrasonic Assisted Electrical Discharge Machining

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,Sichuan University,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]四川大学创新方法与创新设计四川省重点实验室,成都610065 [3]四川大学电子科技大学材料与能源学院,成都611731

出　　处：《机械工程材料》2023年第1期76-80,共5页Materials For Mechanical Engineering

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

摘　　要：以铜、镍金属为正负电极,采用超声辅助电火花放电(EDM)法合成Cu-Ni合金粉体,研究了超声功率(0,500,1000,1500 W)对合金粉体晶体结构、微观形貌和粒径分布的影响。结果表明:不同功率超声辅助EDM合成的Cu-Ni合金粉体的物相均主要由Cu_(0.81)Ni_(0.19)、Ni、CuO、NiO和Fe_(2)O_(3)组成,主晶相Cu_(0.81)Ni_(0.19)为面心立方结构;随着超声功率的增加,Cu_(0.81)Ni_(0.19)相的衍射峰强度增大,半高宽变窄,粉体结晶性变好。引入超声辅助合成的Cu-Ni合金粉体中出现较大尺寸不规则颗粒,但球形颗粒的尺寸减小,粉体粒径分布范围变宽;随着超声功率的增大,平均粒径D50减小。Cu-Ni alloy powders were synthesized by ultrasonic assisted electrical discharge machining(EDM)method with copper and nickel metals as positive and negative electrodes,respectively.The effects of ultrasonic power(0,500,1000,1500 W)on the crystal structure,micromorphology and particle size distribution of the alloy powder were investigated.The results show that the phases of Cu-Ni alloy powders synthesized by ultrasonic assisted EDM under different power conditions were all composed of Cu_(0.81)Ni_(0.19),Ni,CuO,NiO and Fe_(2)O_(3).The main crystal phase Cu_(0.81)Ni_(0.19) had a face-centered cubic structure.With increasing ultrasonic power,the diffraction peak intensity of the Cu_(0.81)Ni_(0.19) increased while the full width at half maximum became narrower,indicating the better crystallinity of the powder.Irregular particles with large size appeared in Cu-Ni alloy powders synthesized by the ultrasonic assisted method,but the size of spherical particles decreased and the distribution range of particle size became wider.With increasing ultrasonic power,the average particle size D50 decreased.

关 键 词：电火花放电加工 Cu-Ni合金粉体 超声功率 晶体结构 粒径 

分 类 号：TG146.1[一般工业技术—材料科学与工程]