Thermal Stress Field in Plasma-Sprayed Ceramic Coatings

[+] Author and Article Information
M. Ferrari

Istituto di Meccanica Teorica e Applicata, Universita di Udine, Udine, Italy

J. H. Harding

Theoretical Physics Division, Harwell Laboratories, Didcot, Oxon OX11, ORA, U.K.

J. Energy Resour. Technol 114(2), 105-109 (Jun 01, 1992) (5 pages) doi:10.1115/1.2905929 History: Received November 01, 1989; Revised September 18, 1991; Online April 16, 2008


In the cooldown phase of the deposition process, plasma-sprayed ceramic barrier coatings generate large residual stresses. In this paper, a scheme for the analysis of the thermal stresses is given, which accounts for the nonuniformity of the temperature field, and for the microstructure of the coating. The considered microstructural data include the morphology and orientation pattern of the porosities. The case of a coated sphere is studied, as an application. In this connection, the coating structure is computer-simulated, and the temperature profile is numerically determined.

Copyright © 1992 by The American Society of Mechanical Engineers
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