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Sintering Kinetics of Plasma-Sprayed Zirconia TBCs

Sintering Kinetics of Plasma-Sprayed Zirconia TBCs
Sintering Kinetics of Plasma-Sprayed Zirconia TBCs
The sintering of free-standing plasma sprayed TBCs has been modelled, based on variational principles of free energy minimization and comparisons are made with experimental results. Predictions of throughthickness shrinkage and changing pore surface area are compared with the experimental data obtained by dilatometry and BET analysis, respectively. The sensitivity of the predictions to initial pore architecture and material properties is assessed. The model can be used to predict the evolution of the contact area between overlying splats. This is in turn related to the through-thickness thermal conductivity, using a previously developed analytical model (I.O. Golosnoy, et al. J. Therm. Spray Technol., 2005, 14(2), p 205-214).
diffusion, modeling, plasma-sprayed thermal barrier coatings, sintering, variational principle
1059-9630
809-815
Cipitria, A.
53f2ee50-b925-41f3-a195-ecb46fce2c01
Golosnoy, I.O.
40603f91-7488-49ea-830f-24dd930573d1
Clyne, T.W.
00678bf7-17de-46e8-9b35-bf1ca73bce9b
Cipitria, A.
53f2ee50-b925-41f3-a195-ecb46fce2c01
Golosnoy, I.O.
40603f91-7488-49ea-830f-24dd930573d1
Clyne, T.W.
00678bf7-17de-46e8-9b35-bf1ca73bce9b

Cipitria, A., Golosnoy, I.O. and Clyne, T.W. (2007) Sintering Kinetics of Plasma-Sprayed Zirconia TBCs. Journal of Thermal Spray Technology, 16 (5-6), 809-815. (doi:10.1007/s11666-007-9080-1).

Record type: Article

Abstract

The sintering of free-standing plasma sprayed TBCs has been modelled, based on variational principles of free energy minimization and comparisons are made with experimental results. Predictions of throughthickness shrinkage and changing pore surface area are compared with the experimental data obtained by dilatometry and BET analysis, respectively. The sensitivity of the predictions to initial pore architecture and material properties is assessed. The model can be used to predict the evolution of the contact area between overlying splats. This is in turn related to the through-thickness thermal conductivity, using a previously developed analytical model (I.O. Golosnoy, et al. J. Therm. Spray Technol., 2005, 14(2), p 205-214).

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Published date: December 2007
Keywords: diffusion, modeling, plasma-sprayed thermal barrier coatings, sintering, variational principle
Organisations: EEE

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Local EPrints ID: 265162
URI: https://eprints.soton.ac.uk/id/eprint/265162
ISSN: 1059-9630
PURE UUID: af8bce4d-f967-4de2-9711-4dbc58068590

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Date deposited: 07 Feb 2008 11:57
Last modified: 19 Jul 2019 22:24

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Contributors

Author: A. Cipitria
Author: I.O. Golosnoy
Author: T.W. Clyne

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