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

被引：0

作者：

Chen Lunjiang ^{[1
,2
]}

Chen Wenbo ^{[3
]}

Liu Chuandong ^{[2
]}

Tong Honghui ^{[2
]}

Zhao Qing ^{[1
]}

机构：

[1] Univ Elect Sci & Technol China, Chengdu 610054, Sichuan, Peoples R China

[2] Southwestern Inst Phys, Chengdu 610041, Sichuan, Peoples R China

[3] Univ South China, Hengyang 421001, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2019年 / 48卷 / 10期

关键词：

RF thermal plasma; emission spectrum; plasma temperature; spherical W powders; FABRICATION; EVOLUTION;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 D-50=20 +/- 5 mu m 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.

引用

页码：3221 / 3226

页数：6

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