丝电爆法制备3D打印金属钽粉的试验研究  

Experimental Study on Preparation of 3D Printing Tantalum Powder by Wire Electrical Explosion

作　　者：秦军 张爱华[1] 王琦[1] 杨富龙[1] 朱亮[2] 朱亚军 QIN Jun;ZHANG Aihua;WANG Qi;YANG Fulong;ZHU Liang;ZHU Yajun(College of Electrical and Information Engineering,Lanzhou University of Technology,Lanzhou 730050;College of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050)

机构地区：[1]兰州理工大学电气工程与信息工程学院,兰州730050 [2]兰州理工大学材料科学与工程学院,兰州730050

出　　处：《计算机与数字工程》2024年第1期266-270,276,共6页Computer & Digital Engineering

基　　金：国家自然科学基金项目(编号:51765038)资助。

摘　　要：针对微米球形钽粉难以制备、粒径不易控制等问题,论文利用丝电爆法成功制备了微米球形钽粉,通过改变初始充电电压、钽丝丝径进行试验,采集丝电爆过程的电压与电流信号,对其机理进行了分析,并表征了所制备的微米钽粉。结果表明:不同丝径下的丝电爆炸过程都经历了五个阶段,丝径为0.4mm钽丝在电爆炸过程中发生了完全气化,而丝径为0.2mm、0.3mm钽丝并未完全气化,处于气液混合的状态;随着初始充电电压的不断增大,一定丝径钽丝上的沉积能量会有不同程度的增加,所制备的微米球形钽粉的平均粒径在逐渐减小;在初始充电电压为10kV时,丝径为0.2mm钽丝所制备的钽粉集中分布在28μm~36μm之间,分布范围较窄,球形度良好,且满足微米级3D打印金属粉的粒径要求。Aiming at problems such as the difficulty of preparing micron spherical tantalum powder and the difficulty of con-trolling the particle size,in this paper,micro spherical tantalum powder is successfully prepared by wire electrical explosion.The voltage and current during the process of wire electrical explosion are collected by changing the initial charging voltage and the diam-eter of tantalum wire.The mechanism is analyzed and the micro tantalum powder is characterized.The results show that the electri-cal explosion process under different wire diameters has gone through five stages.The 0.4mm tantalum wire is completely vaporized during the process of electrical explosion,while 0.2mm and 0.3mm tantalum wires are not completely vaporized and are in the state of gas-liquid mixing.With the continuous increasing of the initial charging voltage,the deposition energy on the tantalum wire of a certain wire diameter increases to varying degrees,and the average particle size of the prepared micron spherical tantalum powder gradually decreases.When the initial charging voltage is 10kV,tantalum powder prepared by 0.2mm tantalum wire is concentrated in the range of 28μm~36μm,with narrow distribution range and good sphericity,which meets the requirements of micron size 3D printing metal powder.

关 键 词：丝电爆 沉积能量 微米钽粉 粒径 

分 类 号：TG14[一般工业技术—材料科学与工程] TM89[金属学及工艺—金属材料]