Title: The air plasma spraying

Authors: Valery S. Klubnikin

Addresses: Professor, Physics-Metallurgical Department, The Leningrad State University of Technology; President of Polyplasma Inc., Polytechnicheskaya Str. 29, Leningrad, 195251, USSR

Abstract: The air plasma spraying is characterized by using of a compressed air as a plasma forming gas. Here is shown the application of benefits of the present technology compared with other spraying process. The creation of the present process was possible due to a reliable plasma torch and certain condition of heating and deposition of powder materials on a work. Plasma torch develops a power up to 50 kW and can work during 14 hours without replacement of a cathode and during 25 hours as for an anode what is acceptable for industrial application. When spraying of coatings a minimum waste of alloying elements is attained with slight increase of oxygen in coating which is comparable with argon plasma spraying in the open. In certain cases the air plasma spraying allows to obtain more perfect coatings and at high performance. The present method finds large application at restoration and strengthening of machine parts, at forming of components etc. The air plasma spraying provides high quality coatings at low cost of components.

Keywords: air plasma spraying; heating; deposition; powder materials; coatings.

DOI: 10.1504/IJMPT.1993.036568

International Journal of Materials and Product Technology, 1993 Vol.8 No.2/3/4, pp.220 - 231

Published online: 04 Nov 2010 *

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