A design of experiment study of plasma-sprayed alumina-titania coatings

An experimental study is presented of the plasma spraying of alumina--titania powder. This powder system is being used to fabricate heater tubes that emulate nuclear fuel tubes for use in thermal-hydraulic testing. Coating experiments were conducted using a Taguchi fractional-factorial design parame...

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Bibliographic Details
Published in:Journal of thermal spray technology 1993-09, Vol.2 (3), p.251-256
Main Authors: Steeper, T. J., Varacalle, D. J., Wilson, G. C., Riggs, W. L., Rotolico, A. J., Nerz, J.
Format: Article
Language:English
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Summary:An experimental study is presented of the plasma spraying of alumina--titania powder. This powder system is being used to fabricate heater tubes that emulate nuclear fuel tubes for use in thermal-hydraulic testing. Coating experiments were conducted using a Taguchi fractional-factorial design parameteric study. Operating parameters were varied around the typical spray parameters in a systematic design of experiments to display the range of plasma processing conditions and their effect on the resultant coating. The coatings were characterized by hardness and electrical tests, image analysis, and optical metallography. Coating qualities are discussed with respect to dielectric strength, hardness, porosity, surface roughness, deposition efficiency, and microstructure. The attributes of the coatings are correlated with the changes in operating parameters.
ISSN:1059-9630
1544-1016
DOI:10.1007/BF02650473