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Coatings 2017, 7(7), 91; doi:10.3390/coatings7070091

Application of FEM to Estimate Thermo-Mechanical Properties of Plasma Sprayed Composite Coatings

1
ICB-LTM, Université de Bourgogne Franche-Comté, IUT Le Creusot, 12 rue de la fonderie, 71200 Le Creusot, France
2
ICB-LERMPS, Université de Bourgogne Franche-Comté, UTBM, 90010 Belfort cedex, France
*
Author to whom correspondence should be addressed.
Received: 31 May 2017 / Revised: 20 June 2017 / Accepted: 22 June 2017 / Published: 30 June 2017
(This article belongs to the Special Issue Modelling and Simulation of Coating)
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Abstract

The presence of defects such as voids, inter-lamellar porosities or cracks causes a decrease in the effective thermal conductivity of plasma-sprayed coatings as well as a decrease in corresponding mechanical properties, such as the Young’s modulus. In general, the effective properties of thermal spray coatings are thus very different from that of bulk materials and thus have to be quantified to validate in service performances. A complementary approach allowing us to understand the relationships between the microstructure of a coating and its macro-properties is that of Finite Element Modeling (FEM). The case of composite coatings is more complicated still, due to the presence of different materials. In the present study, thermo-mechanical properties of a plasma-sprayed composite coating were estimated by numerical modeling based on FEM. The method applied uses directly cross-sectional micrographs without simplification, using a one-cell per pixel approach. Characteristics such as the thermal conductivity, the Young’s modulus, the Poisson’s ratio and the dilatation coefficient were considered. The example selected was an AlSi/polyester coating used as an abradable seal in the aerospace industry. View Full-Text
Keywords: FEM; plasma spray coatings; effective properties; thermomechanical properties FEM; plasma spray coatings; effective properties; thermomechanical properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Bolot, R.; Aussavy, D.; Montavon, G. Application of FEM to Estimate Thermo-Mechanical Properties of Plasma Sprayed Composite Coatings. Coatings 2017, 7, 91.

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