SYMPOSIA PAPER Published: 01 January 1995

Interface Cracks in Thermally Loaded Multilayer Ceramic Coatings


The crack tip deformations and strain energy release rates were calculated for interface cracks in multilayer ceramic coatings subjected to transient heating followed by cooling. It was shown that the interface nearest to the surface of the coating experiences the largest G. As the length of the crack increases, G becomes significantly larger. Reducing the thermal expansion coefficient and modulus of elasticity of the coating reduces the maximum interfacial strain energy release rate.

Author Information

Kokini, K
School of Mechanical Engineering, Purdue University, West Lafayette, IN
Takeuchi, YR
Mechanical Engineering, Purdue University, West Lafayette, IN
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Developed by Committee: E08
Pages: 177–190
DOI: 10.1520/STP14592S
ISBN-EB: 978-0-8031-5294-6
ISBN-13: 978-0-8031-1882-9