Effect of powder loading on the excitation temperature of a plasma jet in DC thermal plasma spray torch

被引：14
|
作者：
Shanmugavelayutham, G.
Selvarajan, V.
Padmanabhan, P. V. A.
Sreekumar, K. P.
Joshi, N. K.
机构：
[1] Bharathiar Univ, Dept Phys, Plasma Phys Lab, Coimbatore 641046, Tamil Nadu, India
[2] Bhabha Atom Res Ctr, L&PTD, Bombay 400085, Maharashtra, India
来源：
CURRENT APPLIED PHYSICS | 2007年 / 7卷 / 02期
关键词：
DC plasma jet; plasma spheroidization; temperature of the plasma jet; plasma diagnostics;
D O I：
10.1016/j.cap.2006.03.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A DC non-transferred mode plasma spray torch was fabricated for plasma spheroidization. The effect of powder-carrier gas and powder loading on the temperature of the plasma jet generated by the torch has been studied. The experiment was done at different input power levels; the temperature of the jet was within 5000-7000 K argon was used as plasma gas and powder-carrier gas. Nickel powder particles in the size range from 40 to 100 pm were processed. The temperature of the jet was estimated after flowing powder-carrier gas only into the plasma jet and with powder-carrier gas feeding powder into the flame. On introduction of powder-carrier gas and powder loading the temperature of the jet was found to decrease appreciably down to 11%. The temperature of the plasma jet was estimated using the Atomic Boltzmann plot method. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：186 / 192
页数：7
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