Paper Title:
Experimental Investigation of Residual Thermal Stress in Thermal Barrier Coating (TBC)
  Abstract

Residual thermal stress, which has a strong effect on the coating performance, is generated during the fabrication of TBC. In this paper, the residual thermal stress in TBC (92%ZrO2-8%Y2O3) with two different thicknesses (0.38 mm and 0.90 mm) is analyzed with a bi-material model. TBC specimens were sprayed by an Air Plasma Spray (APS). In addition, a chemical material removal method was used to obtain TBC specimens after it cooling down to the room temperature. Before and after the coating removed from the substrate, the deformation of the TBC was measured. Then the bi-material model was used to calculate the residual thermal stress in the TBC. The experiment result shows that, the residual thermal stress in thin TBC is smaller than that in thick TBC (the average residual thermal stress in thin and thick specimens are 145.5 MPa and 225.13 MPa respectively). The micro-structures in thin and thick TBC are also observed and discussed.

  Info
Periodical
Key Engineering Materials (Volumes 462-463)
Edited by
Ahmad Kamal Ariffin, Shahrum Abdullah, Aidy Ali, Andanastuti Muchtar, Mariyam Jameelah Ghazali and Zainuddin Sajuri
Pages
295-300
DOI
10.4028/www.scientific.net/KEM.462-463.295
Citation
Y. Song, Q. Z. Fang, T. J. Wang, "Experimental Investigation of Residual Thermal Stress in Thermal Barrier Coating (TBC)", Key Engineering Materials, Vols. 462-463, pp. 295-300, 2011
Online since
January 2011
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Price
$32.00
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