Journal
COATINGS
Volume 10, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/coatings10040388
Keywords
atmospheric plasma spraying; deposit footprint; swirl effect; mathematical modeling; plasma torch
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Funding
- CONACYT through a FONCICYT project [279931]
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Experimental evidence of swirling effects in 3D trajectories of in-flight particles is presented based on static and dynamic footprints analysis as a function of stand-off distance of Al2O3 deposited employing a Metco-9MB torch. Swirling effects were validated with a proprietary computational fluid dynamics (CFD) code that considers an argon-hydrogen plasma stream, in-flight particles trajectories, both creating the spray cone, and particle impact to form a footprint on a fixed substrate located at different distances up to 120 mm. Static and dynamic footprints showed that swirl produces a slight deviation of individual particle trajectories and thus footprint rotation, which may affect coating characteristics.
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