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In situ characterization of small-particle plasma sprayed powders

Su, Y. J. and Bernecki, T. F. and Faber, K. T. (2002) In situ characterization of small-particle plasma sprayed powders. Journal of Thermal Spray Technology, 11 (1). pp. 52-61. ISSN 1059-9630. doi:10.1361/105996302770348970.

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The effect of various small-particle plasma spray powder injection parameters on the in situ particle position, velocity, and temperature is measured for yttria-stabilized zirconia and yttrium-aluminum-garnet powder. Using full-factorial experiments and multiple regression analysis, carrier gas flow, injector angle, and powder feeder disc speed were found to significantly affect the particle properties. Temperature and velocity were inversely related; on average, the cooler particles traveled faster. These properties also correlated to the particle position in the flame, where particles above the centerline of the flame traveled faster. The trends are discussed on the basis of residence time in the flame, as well as in terms of particle size segregation effects. Coating density and splat geometry reflect the temperature and velocity differences between the runs. Slower, hotter particles possessed more intrasplat and intersplat porosity and less splat-substrate contact area, leading to lower overall coating density.

Item Type:Article
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URLURL TypeDescription
Faber, K. T.0000-0001-6585-2536
Additional Information:© 2002 ASM International. (Submitted 5 October 2000; in revised form 21 December 2000). The authors would like to thank Rick Marzec of the Advanced Coatings Technology Group at Northwestern University for general assistance in the thermal spray laboratory, Ronald Parker of Stratonics Inc. for technical assistance with the pyrometer hardware and software, and John Montgomery for carefully reviewing the manuscript. This work was supported by the U.S. Department of Energy, Federal Energy Technology Center, Cooperative Agreement No. DE-FC21-92MC29061, under subcontract No. 96-01-SR047.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FC21-92MC29061
Subject Keywords:in-flight, particle, temperature, velocity
Issue or Number:1
Record Number:CaltechAUTHORS:20140908-181321890
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49386
Deposited By: George Porter
Deposited On:09 Sep 2014 14:40
Last Modified:10 Nov 2021 18:43

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