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An Analytical and Experimental Study of Plasma Spraying of Alumina

Published online by Cambridge University Press:  25 February 2011

D. J. Varacalle Jr
D. J. Varacalle Jr*
Affiliation:
Idaho National Engineering Laboratory, EG&G Idaho, Inc., P.O. Box 1625 Idaho Falls, ID 83415–2210
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Abstract

As part of an investigation of the dynamics that occur in the plume of a typical thermal spray torch, an analytical and experimental study of the plasma spraying of alumina is being performed; preliminary results are reported here. Numerical models of the physical processes in the torch column and plume were used to determine the temperature and flow fields. Computer simulations of particle injection (15, 34, and 53 μm alumina particles) are also presented. The alumina experiments were conducted at a 35 kW power level using a 100 scfh argon and 15 scfh hydrogen gas mixture for two alumina powders. The quality of the coatings is discussed with respect to porosity, sample metallography, and microhardness.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 121: Symposium H – Better Ceramics Through Chemistry III , 1988 , 541
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

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4. Varacalle, D. J. Jr, et al., “Modeling Particulate Injection in Thermal Plasma Material Processing Experiments,” 1986 Metallurgical Society Extractive and Process Metallurgy Fall Meeting, Colorado, Springs, Colorado, November, 1986.Google Scholar
5. Varacalle, D. J. Jr et al., “Analytically Modeling the Carbothermic Reduction of Alumina in a Thermal Plasma” (Paper published in symposium volume of December 2, 1987 Metallurgical Society Fall Meeting, Palm, Springs, California).Google Scholar
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