Thermal Conductivity Measurement of an Electron-Beam Physical-Vapor-Deposition Coating |
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Authors: | A J Slifka B J Filla |
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Affiliation: | National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80303 |
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Abstract: | An industrial ceramic thermal-barrier coating designated PWA 266, processed by electron-beam physical-vapor deposition, was measured using a steady-state thermal conductivity technique. The thermal conductivity of the mass fraction 7 % yttria-stabilized zirconia coating was measured from 100 °C to 900 °C. Measurements on three thicknesses of coatings, 170 μm, 350 μm, and 510 μm resulted in thermal conductivity in the range from 1.5 W/(m·K) to 1.7 W/(m·K) with a combined relative standard uncertainty of 20 %. The thermal conductivity is not significantly dependent on temperature. |
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Keywords: | EB-PVD thermal barrier coating thermal conductivity yttria-stabilized zirconia |
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