This paper investigates the influence of spray distance on inflight particle status for Yttria Stabilized Zirconia (YSZ), Mo and NiCrAlY thermal spray powders in Ar-H2 plasma through modeling and experiments. Distributions of individual particle characteristics such as temperature, velocity and size at the point of the maximum particle flux and points of the squared grids were measured for a few plume cross-sections. Numerical simulations were performed using the experimental conditions, and parametric studies were also performed. In-flight particle characteristics and their distributions were presented at different standoff/spray distances to reveal the heating and melting behaviors of different kinds of materials such as metal, alloy and ceramics powders. It can be found that for ceramic, metal and alloy powders, the particle velocity and temperature all increase with spray distance and then decrease after reaching maximum. However the positions of maximum temperature and velocity depend strongly on the material and size of the particles. The statistical distributions of temperature and velocity at different spray distances were also presented. It can be observed that the temperature distribution becomes narrower as spray distance increases. The occurrence of such behavior can be explained by analyzing particle kinetic energy and molten status. The correlations between powder properties and spray conditions have been established and they can serve as guidance for spray distance optimization of air plasma spraying for metal, alloys and ceramics particles.
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ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference
July 8–12, 2007
Vancouver, British Columbia, Canada
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-4274-6
PROCEEDINGS PAPER
Generic Correlation of Spray Distance With In-Flight Particle Behavior for Different Kinds of Materials in Air Plasma Spraying Available to Purchase
Wei Zhang,
Wei Zhang
Stony Brook University, Stonybrook, NY
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Lili Zheng,
Lili Zheng
Stony Brook University, Stonybrook, NY
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Hui Zhang,
Hui Zhang
Stony Brook University, Stonybrook, NY
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Sanjay Sampath
Sanjay Sampath
Stony Brook University, Stonybrook, NY
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Wei Zhang
Stony Brook University, Stonybrook, NY
Lili Zheng
Stony Brook University, Stonybrook, NY
Hui Zhang
Stony Brook University, Stonybrook, NY
Sanjay Sampath
Stony Brook University, Stonybrook, NY
Paper No:
HT2007-32393, pp. 765-774; 10 pages
Published Online:
August 24, 2009
Citation
Zhang, W, Zheng, L, Zhang, H, & Sampath, S. "Generic Correlation of Spray Distance With In-Flight Particle Behavior for Different Kinds of Materials in Air Plasma Spraying." Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 1. Vancouver, British Columbia, Canada. July 8–12, 2007. pp. 765-774. ASME. https://doi.org/10.1115/HT2007-32393
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