Elastic and Conductive Properties of Plasma-Sprayed Ceramic Coatings in Relation to Their Microstructure: An Overview

This article focuses on micromechanics-based models that explicitly express the elastic and conductive properties of plasma-sprayed ceramic coatings in terms of relevant microstructural parameters. These parameters reflect, in an integral way, the density and the orientation distribution of microcra...

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Bibliographic Details
Published in:Journal of Thermal Spray Technology, Vol. 18, No. 5/6 (2009), p. 822-834
Main Author: Sevostianov, Igor
Other Involved Persons: Kachanov, Mark
Format: electronic Article
Language:English
ISSN:1544-1016
Item Description:Open Access
Physical Description:Online-Ressource
DOI:10.1007/s11666-009-9344-z
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  • This article focuses on micromechanics-based models that explicitly express the elastic and conductive properties of plasma-sprayed ceramic coatings in terms of relevant microstructural parameters. These parameters reflect, in an integral way, the density and the orientation distribution of microcracks; they apply to strongly oblate pores as well. On the other hand, the porosity parameter usually plays a secondary role. Partial contacts between crack faces—a factor of major importance—are reflected via appropriate reduction of crack densities. The effect of various "irregularities” of crack shapes is discussed. Case studies of YSZ coatings demonstrate how the micromechanics-based modeling can be used and directly interfaced with 2-D image data.