Abstract
Due to the low thermal conductivity of ceramics large temperature gradients are present through the powder particles during plasma spray deposition. As a result the particles often impinge at the substrate in a semi-molten form; which in turn substantially affects the final characteristics of the coating being formed. This study is dedicated to the novel modelling development and simulation of a semimolten droplet impingement. The study examines the impingement process during impact, spreading and solidification of semi-molten zirconia. The simulation provides an insight to the heat transfer process during impact and solidification of a semi-molten powder particle and illustrates the freezing-induced break-up mechanism at the splat periphery.
| Original language | English |
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| Pages (from-to) | 1011-1019 |
| Number of pages | 9 |
| Journal | Applied Physics A: Materials Science and Processing |
| Volume | 104 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Sept 2011 |