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Progress in Plasma Processing of Materials, 1999

ISBN:
1-56700-126-2 (Print)

AN ELECTRO THERMAL CHEMICAL TECHNOLOGY FOR THERMAL SPRAY - PRESENTATION OF THEORETICAL MODEL AND EXPERIMENTAL RESULTS

S. Wald
Propulsion Physics Laboratory, Soreq NRC, Yavne 81800

G. Appelbaum
Propulsion Physics Division, SOREQ NRC, Yavne 81800

R. Alimi
Propulsion Physics Laboratory, Physical Systems Division SOREQ NRC, Yavne 81800, Israel

L. Rabani
Propulsion Physics Division, SOREQ NRC, Yavne 81800

S. Cuperman
School of Physics and Astronomy, Tel-Aviv University

C. Bruma
School of Physics and Astronomy, Tel-Aviv University

D. Zoler
Propulsion Physics Laboratory, Soreq NRC, Yavne 81800; School of Physics and Astronomy, Tel-Aviv University

V. Zhitomirsky
Faculty of Engineering, Tel-Aviv University

M. Factor
School of Applied Science, The Hebrew University, Jerusalem

I. Roman
School of Applied Science, The Hebrew University, Jerusalem

Abstract

Preliminary theoretical and experimental results concerning a new spray technology for producing hard-coatings are reported. The method is based on powder particles acceleration and heating by a plasma - combustion gases mixture produced in an Electro-Thermal Chemical (ETC) process [1].
The technology appears promising for the deposition of several materials, such as cemented carbides, to obtain coatings on variety of substrates. In order to better understand and optimize the coating process a theoretical model describing the complex physics taking place within the device was developed. The experimental data concerning the gas pressure, particle velocity and other parameters are in good agreement with the model predictions.