钨粉的球化及前驱体钨粉注入对等离子温度的影响  

Spheroidization of Tungsten Powders and the Effects of Precursor W Powder Injection on Plasma Temperature

作　　者：陈伦江 陈文波[3] 刘川东[2] 童洪辉[2] 赵青[1] Chen Lunjiang;Chen Wenbo;Liu Chuandong;Tong Honghui;Zhao Qing(University of Electronic Science and Technology of China,Chengdu 610054,China;Southwestern Institute of Physics,Chengdu 610041,China;University of South China,Hengyang 421001,China)

机构地区：[1]电子科技大学,四川成都610054 [2]核工业西南物理研究院,四川成都610041 [3]南华大学,湖南衡阳421001

出　　处：《稀有金属材料与工程》2019年第10期3221-3226,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(11805058,11535003);四川省青年科技创新研究团队专项计划(2016TD0015)

摘　　要：对前驱体粉体颗粒注入到等离子中的等离子温度变化情况进行研究可为优化粉体球化工艺提供参考。采用单一因素法研究了钨(W)粉注入前后不同功率及不同位置等离子射流发射光强及温度的变化规律,并对粒度D50=20±5μm的W粉进行了球形化处理及性能表征。结果表明:W粉颗粒的注入使等离子发射光强、温度均下降;随着功率增加,W粉注入对等离子温度的影响效应减弱;当P=56 kW时,球化率与卫星率分别约为95%和21%,粉体的流动性及密度均明显改善。An experimental investigation on the plasma temperature after the precursor powder injection can provide a reference for the process optimization of plasma spheroidization.The effect of tungsten powder injection on the emission intensity and plasma temperature was investigated at different positions and RF power with a single factor method,and the tungsten powder with the particle size of D50=20±5 μm was spheroidized by the plasma.The results show that the emission intensity and temperature of plasma jets both decrease after tungsten powder injection.The effect of W powder injection on the plasma temperature is weakened with the increase of RF power,and the spheroidization and satellite ratio are about 95% and 21% when P=56 kW,respectively.The flow ability and density of powder significantly improve after plasma spheroidization.

关 键 词：射频热等离子 发射光谱 等离子温度 球形钨粉 

分 类 号：TF123[冶金工程—粉末冶金]