An optimised de-Laval-type-contour for the Atmospheric Plasma Spraying (APS) with respect to the thermal and deposition efficiency as well as to the arc voltage fluctuations and the sound level of the plasma torch is presented. Investigations of the plasma gas dynamics and two different feedstock materials (Al2O3 (fused and crashed) and Cr2O3 (agglomerated and sintered)) have been done to promote the industrial utilization of convergent-divergent nozzles for the APS.

alumina, arc voltage fluctuations, atmospheric plasma spraying, chromia, deposition efficiency, plasma torches, spray nozzle design
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Copyright © 2004 ASM International. All rights reserved.
2004
ASM International
Topics
Ceramic powder Thermal spray equipment Alumina ceramics Plasma spray coating
Issue Section:
Innovative Equipment and Process Technology
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