The Paton Welding Journal, 2012, №02



2012 №02 (05)

2012 №02 (07)

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The Paton Welding Journal, 2012, #2, 28-32 pages  

EFFICIENCY OF THE USE OF PROTECTIVE EXTENSION IN PLASMA SPRAYING

A.P. MURASHOV, A.P. GRISHCHENKO, N.V. VIGILYANSKAYA, A.N. BURLACHENKO and I.A. DEMIANOV

E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
It was established that the use of the protective extension provides a 25 % increase in average velocity of spraying particles, improves heating of the particles, and decreases the required specific energy of the spraying process by 20 % due to increase in size of the high-temperature zone of the plasma jet. The content of oxides in coatings deposited by using the extension is 10 % lower, the content of pores in them is 4 times lower, and the coating to substrate adhesion strength is 20 % higher.
 
 
Keywords: plasma spraying, plasma jet, extension, properties of coatings, material utilisation factor, experimental design
 
 
Received:                05.09.11
Published:               28.02.12
 
 
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