RESEARCH PAPERS: Gas Turbines: Structures and Dynamics

Ceramic Coating Edge Failure Due to Thermal Expansion Interference

[+] Author and Article Information
H. A. Nied

Advanced Manufacturing, Technology Associates, 13 Shadow Wood Way, Ballston Lake, NY 12019

J. Eng. Gas Turbines Power 120(4), 820-824 (Oct 01, 1998) (5 pages) doi:10.1115/1.2818474 History: Received March 20, 1997; Online November 19, 2007


An investigation of thermal barrier coatings on a metal substrate was conducted when the assembly was subjected to both thermal heating and mechanical edge loads generated by interference in adjoining expansion gaps. Both finite element and closed form solution models were developed and compared. The results of the analyses predict that the application of both thermal and mechanical edge loads on the edge of ceramic/metal composites can produce severe local edge spallation in the ceramic coating when an inadequate expansion gap is provided.

Copyright © 1998 by The American Society of Mechanical Engineers
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