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Title: Thermophysical properties of thermal sprayed coatings on carbon steel substrates by photothermal radiometry

Abstract

Laser infrared photothermal radiometry (PTR) was used to measure the thermophysical properties (thermal diffusivity and conductivity) of various thermal sprayed coatings on carbon steel. A one-dimensional photothermal model of a three-layered system in the backscattered mode was introduced and compared with experimental measurements. The uppermost layer was used to represent a roughness-equivalent layer, a second layer represented the substrate. The thermophysical parameters of thermal sprayed coatings examined in this work were obtained when a multiparameter-fit optimization algorithm was used with the backscattered PTR experimental results. The results also suggested a good method to determine the thickness of tungsten carbide and stainless-steel thermal spray coatings once the thermal physical properties are known. The ability of PTR to measure the thermophysical properties and the coating thickness has a strong potential as a method for in situ characterization of thermal spray coatings.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Univ. of Toronto, Ontario (CA)
OSTI Identifier:
20020850
Resource Type:
Journal Article
Journal Name:
International Journal of Thermophysics
Additional Journal Information:
Journal Volume: 20; Journal Issue: 5; Other Information: PBD: Sep 1999; Journal ID: ISSN 0195-928X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; THERMODYNAMIC PROPERTIES; SPRAYED COATINGS; TUNGSTEN CARBIDES; STAINLESS STEELS; MEASURING METHODS

Citation Formats

Garcia, J.A., Mandelis, A., Farahbakhsh, B., Lebowitz, C., and Harris, I. Thermophysical properties of thermal sprayed coatings on carbon steel substrates by photothermal radiometry. United States: N. p., 1999. Web. doi:10.1023/A:1021457625651.
Garcia, J.A., Mandelis, A., Farahbakhsh, B., Lebowitz, C., & Harris, I. Thermophysical properties of thermal sprayed coatings on carbon steel substrates by photothermal radiometry. United States. doi:10.1023/A:1021457625651.
Garcia, J.A., Mandelis, A., Farahbakhsh, B., Lebowitz, C., and Harris, I. Wed . "Thermophysical properties of thermal sprayed coatings on carbon steel substrates by photothermal radiometry". United States. doi:10.1023/A:1021457625651.
@article{osti_20020850,
title = {Thermophysical properties of thermal sprayed coatings on carbon steel substrates by photothermal radiometry},
author = {Garcia, J.A. and Mandelis, A. and Farahbakhsh, B. and Lebowitz, C. and Harris, I.},
abstractNote = {Laser infrared photothermal radiometry (PTR) was used to measure the thermophysical properties (thermal diffusivity and conductivity) of various thermal sprayed coatings on carbon steel. A one-dimensional photothermal model of a three-layered system in the backscattered mode was introduced and compared with experimental measurements. The uppermost layer was used to represent a roughness-equivalent layer, a second layer represented the substrate. The thermophysical parameters of thermal sprayed coatings examined in this work were obtained when a multiparameter-fit optimization algorithm was used with the backscattered PTR experimental results. The results also suggested a good method to determine the thickness of tungsten carbide and stainless-steel thermal spray coatings once the thermal physical properties are known. The ability of PTR to measure the thermophysical properties and the coating thickness has a strong potential as a method for in situ characterization of thermal spray coatings.},
doi = {10.1023/A:1021457625651},
journal = {International Journal of Thermophysics},
issn = {0195-928X},
number = 5,
volume = 20,
place = {United States},
year = {1999},
month = {9}
}