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The Effect of Pore Shape to the Effective Thermal Conductivity of Thermal Barrier Coatings

[+] Author Affiliations
Ozge Altun

Eskisehir Osmangazi University, Eskisehir, Turkey

Y. Erhan Böke

Istanbul Technical University, Istanbul, Turkey

Paper No. HT2008-56171, pp. 449-457; 9 pages
doi:10.1115/HT2008-56171
From:
  • ASME 2008 Heat Transfer Summer Conference collocated with the Fluids Engineering, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
  • Heat Transfer: Volume 1
  • Jacksonville, Florida, USA, August 10–14, 2008
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4847-0 | eISBN: 0-7918-3832-3
  • Copyright © 2008 by ASME

abstract

Effective thermal conductivity is an important parameter for the design of porous ceramic coatings that are exposed to high temperatures. Pore shapes which change in relation with the coating parameters and coating method affect the effective thermal conductivity significantly. In this study the effective thermal conductivity of 8 wt % yttria stabilized ZrO2 coating deposited by air plasma spraying have been calculated by finite element method using digital images. The effects of pore shape on effective thermal conductivity have been discussed.

Copyright © 2008 by ASME

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