Characteristics and Thermal Efficiency of a Non-transferred DC Plasma Spraying Torch Under Low Pressure

被引：0

作者：

Bao Shicong ^{[1
,3
]}

Guo Wenkang ^{[2
]}

Ye Minyou ^{[1
]}

Xu Ping ^{[2
]}

Zhang Xiaodong ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China

[2] Fudan Univ, Inst Modern Phys, Shanghai 210011, Peoples R China

[3] Wuhan Inst Technol, Sch Mat Sci & Engn, Wuhan 430073, Peoples R China

来源：

PLASMA SCIENCE & TECHNOLOGY | 2008年 / 10卷 / 06期

关键词：

I-V characteristics; thermal efficiency; DC plasmatron; vacuum;

D O I：

暂无

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Current-voltage (I-V) characteristics of a non-transferred DC arc plasma spray torch operated in argon at vacuum are reported. The arc voltage is of negative characteristics for a current below 200 A,. at for a current between 200 A to 250 A and positive for a current beyond 250 A. The voltage increases slowly with the increase in carrier gas of arc. The rate of change in voltage with currents is about 3 similar to 4 V/100 A at a gas flow rate of about 1 similar to 1.5 V/10 standard liter per minute (slpm). The I-V characteristics of the DC plasma torch are of a shape of hyperbola. Arc power increases with the argon flow rate, and the thermal efficiency of the torch acts in a similar way. The thermal efficiency of the non-transferred DC plasmatron is about 65 similar to 78%.

引用

页码：701 / 705

页数：5

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