Splat formation in plasma-spray coating process*
Javad Mostaghimi and Sanjeev Chandra
Centre for Advanced Coating Technologies, University
of Toronto, 5 King's College Road, Toronto, Ontario M5S-3G8, Canada
Abstract: The paper describes recent developments in modeling
formation of plasma-spray coatings. This is a stochastic process in
which particle-impact conditions, thermophysical properties, substrate
topology, and temperature all play important roles in determining the
structure of coating. Specific attention is paid to the simulation of
droplet impact and solidification under plasma-spraying conditions.
Results of 3-dimensional models show that on a flat surface solidification
may cause splashing and break-up of the impacting particle. Undercooling
effects result in faster solidification and, thus, smaller extent of
spreading. More recent works investigate the effect of surrounding gas
on dynamics of impact. It is shown that this could result in entrapment
of a bubble under the droplet.
* Lecture presented at the 15th International Symposium
on Plasma Chemistry, Orléans, France, 9-13 July 2001. Other presentations
are presented in this issue, pp. 317–492.
** Corresponding author.
Page last modified 19 April 2002.
Copyright © 2002 International Union of Pure and Applied Chemistry.
Questions or comments about IUPAC, please contact, the Secretariat.
Questions regarding the website, please contact web
manager.
