Modelling of gas permeation through ceramic coatings produced by thermal spraying
Modelling of gas permeation through ceramic coatings produced by thermal spraying
An analytical model has been developed for simulation of gas permeation through thermal spray coatings, and for prediction of the permeability. The model is based on a geometrical representation of the coating microstructure. This involves thin splats, with limited inter-splat bridging, and microcracks within the splats. Important variables include the thickness (smallest dimension) of the inter-splat pores and intra-splat microcracks. Uniform values of these parameters are used in the model. Predicted permeabilities are compared with experimental data obtained using plasma-sprayed zirconia coatings, both in the as-sprayed state and after heat treatments sufficient to generate significant microstructural changes via sintering effects. In general, good agreement is obtained and it is concluded that the model constitutes a useful tool for exploration of gas permeation characteristics in coatings or layers produced by thermal spraying
Gas permeability, Analytical modelling, Plasma spray coatings, Porous material
874-883
Golosnoy, I.O.
40603f91-7488-49ea-830f-24dd930573d1
Paul, S.
83953eee-4704-4a37-a39a-3f885b22af28
Clyne, T.W.
00678bf7-17de-46e8-9b35-bf1ca73bce9b
February 2008
Golosnoy, I.O.
40603f91-7488-49ea-830f-24dd930573d1
Paul, S.
83953eee-4704-4a37-a39a-3f885b22af28
Clyne, T.W.
00678bf7-17de-46e8-9b35-bf1ca73bce9b
Golosnoy, I.O., Paul, S. and Clyne, T.W.
(2008)
Modelling of gas permeation through ceramic coatings produced by thermal spraying.
Acta Materialia, 56 (4), .
(doi:10.1016/j.actamat.2007.09.045).
Abstract
An analytical model has been developed for simulation of gas permeation through thermal spray coatings, and for prediction of the permeability. The model is based on a geometrical representation of the coating microstructure. This involves thin splats, with limited inter-splat bridging, and microcracks within the splats. Important variables include the thickness (smallest dimension) of the inter-splat pores and intra-splat microcracks. Uniform values of these parameters are used in the model. Predicted permeabilities are compared with experimental data obtained using plasma-sprayed zirconia coatings, both in the as-sprayed state and after heat treatments sufficient to generate significant microstructural changes via sintering effects. In general, good agreement is obtained and it is concluded that the model constitutes a useful tool for exploration of gas permeation characteristics in coatings or layers produced by thermal spraying
Text
iog_sp_am_56_2008_p874.pdf
- Other
More information
Published date: February 2008
Keywords:
Gas permeability, Analytical modelling, Plasma spray coatings, Porous material
Organisations:
EEE
Identifiers
Local EPrints ID: 265163
URI: http://eprints.soton.ac.uk/id/eprint/265163
ISSN: 1359-6454
PURE UUID: 9108fdf6-0a62-4a5c-b502-96b9da2e42d1
Catalogue record
Date deposited: 07 Feb 2008 12:05
Last modified: 14 Mar 2024 08:03
Export record
Altmetrics
Contributors
Author:
I.O. Golosnoy
Author:
S. Paul
Author:
T.W. Clyne
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics