Abstract
The thermal diffusivity of free-standing tungsten and zirconia plasma-sprayed coatings was measured in the directions parallel and perpendicular to their surface. The parallel thermal diffusivity was evaluated by a double-sensing Laplace-transform technique and compared to the perpendicular values obtained by the (lash technique. Ratios between the parallel and the perpendicular thermal diffusivity values were in the range of 1.1 to 1.5 for zirconia and 4 to 6 for tungsten. The results are discussed in terms of the coating thickness and microstructure.
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On leave from Laboratoire d'Énergetique et de Méchanique Théorique et Appliquée, B.P. 160, 54504 Vandoeuvre les Nancy, France.
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Houlbert, A.S., Cielo, P., Moreau, C. et al. Measurement of thermal diffusivity and anisotropy of plasma-sprayed coatings. Int J Thermophys 15, 525–546 (1994). https://doi.org/10.1007/BF01563712
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DOI: https://doi.org/10.1007/BF01563712