Conference proceeding
Heating and impact modeling of HVOF sprayed polymer particles
THERMAL SPRAY 2004: ADVANCES IN TECHNOLOGY AND APPLICATION, PROCEEDINGS, pp.790-795
01 Jan 2004
Abstract
An initial stage of the current work including a preliminary comparative numerical analysis of molten polymer and metal droplets upon impact on a cold steel substrate was presented. A commercially available Volume-of-Fluid [VoF] code was used to model particle deformation and cooling of molten nylon-11 and zinc droplets on impact with a steel substrate. Comparison between polymer and metal splatting was chosen in order to better understand how large fundamental differences between the materials affected their spreading behavior under similar thermal spray conditions. It was found that the inertia is more strongly balanced by the viscous flow resistance in molten polymers while high surface tension of molten metals may lead to particle breakup onto rivulets and satellite during later stage of particle deformation. Spreading ratios of nylon-11 and zinc droplets were 0.53 and 0.34, respectively, owing to the zinc droplets being almost twice the size of the nylon. Zinc splats less than 5 pm in thickness spread fully and solidified in less than 1.5 mu s. Over the same time interval, 17 mu m thick nylon-11 splats were also fully developed, however, only a thin boundary layer [< 2 mu m] was solidified owing to a significantly lower thermal conductivity.
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Details
- Title
- Heating and impact modeling of HVOF sprayed polymer particles
- Creators
- M IvosevicR A CairncrossR KnightASM
- Publication Details
- THERMAL SPRAY 2004: ADVANCES IN TECHNOLOGY AND APPLICATION, PROCEEDINGS, pp.790-795
- Conference
- Thermal Spray 2004: Advances in Technology and Application
- Publisher
- Asm International
- Number of pages
- 6
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Materials Science and Engineering; Chemical and Biological Engineering
- Identifiers
- 991019295291504721
InCites Highlights
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- Web of Science research areas
- Materials Science, Characterization & Testing
- Materials Science, Coatings & Films