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In this paper, thermal wave interferometry is applied to measure the thermal diffusivity (alpha) of several samples of PSZ (8 mol.% yttria) coatings (about 250-560 micron thick) plasma sprayed in air on ferritic steel C20. In particular, the frequency dependence of the temperature signal phase is analysed in the low frequency range (1-10 Hz) for a sample having a PSZ coating of 300 micron. The thermal conductivity (kappa) values calculated by the well-known relationship kappa = rho c(p) alpha (rho = bulk density, c(p) = specific heat) are compared to that of a monolithic PSZ ceramic, to investigate the role of porosity.

Additional information

Authors: FABBRI L, JRC Ispra (IT);FENICI P, JRC Ispra (IT)
Bibliographic Reference: Paper presented: QIRT 94 : Quantitative Infrared Thermology, Sorrento (IT), August 23-26, 1994
Availability: Available from (1) as Paper EN 38558 ORA
Record Number: 199411288 / Last updated on: 1994-12-06
Original language: en
Available languages: en
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