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Modelling of gas permeation through ceramic coatings produced by thermal spraying

Record type: Article

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

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Citation

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), pp. 874-883. (doi:10.1016/j.actamat.2007.09.045).

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: 18 Jul 2017 07:28

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Contributors

Author: I.O. Golosnoy
Author: S. Paul
Author: T.W. Clyne

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