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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN Druckformat: 1093-3611
ISSN Online: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v7.i2.80
8 pages

THEORY OF CERAMIC SPLAT FORMATION UNDER PLASMA SPRAYING

O. P. Solonenko
Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, 4/1 Institutskaya str., Novosibirsk, 630090, Russia

ABSTRAKT

A new theoretical solution for the prediction of the thickness and diameter of a metal oxide splat (Prandtl number Pr>l) under plasma spraying (Weber number We>100, Reynolds number Re>100) has been derived and experimentally tested. The theoretical approach developed is based on a two-stage description of the process of splat formation (ideal and consequent viscous spreading of a melt over solidifying layer). The preliminary results of comparison show a satisfactory agreement between predicted and measured thickness and diameter of splats without introducing any empirical constant. The results obtained are of specific interest for understanding the basic phenomena of plasma spraying the coatings from the powder materials characterized by high viscosity and low thermal conductivity of the melt.


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