Interaction of a Crack in the Plasma-Sprayed Ceramic Coating with the Metal Substrate


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Plasma-sprayed ceramic coatings contain a high density of intrasplat microcracks which are responsible for small Young’s moduli and low fracture toughness. The extension of an initial surface crack in the direction to the interface, where the crack is repelled by the metal substrate with higher Young’s modulus, is studied using the methods of fracture mechanics. It is shown that high tensile stresses induced by the crack in the interface can lead to a local decohesion along the interface so that the crack can deviate into the interface.



Edited by:

Jaroslav Pokluda




L. Náhlík et al., "Interaction of a Crack in the Plasma-Sprayed Ceramic Coating with the Metal Substrate", Materials Science Forum, Vol. 482, pp. 223-226, 2005

Online since:

April 2005




[1] L. Pawlowski: The Science and Engineering of Thermal Spray Coatings. J. Wiley, NewYork (1995).

[2] F. Kroupa: In Proceedings of 3rd International Conference MSMF-3, Brno University of Technology (2001), p.408.

[3] J. W. Hutchinson and Z. Suo : Advances in Applied Mechanics 29 (1991), p.63.

[4] J. L. Beuth, Jr.: Int. J. of Solid Structures 29 (1992), p.1657.

[5] Z. Knésl, L. Náhlík and J. C. Radon: Comput. Mater. Science 28 (2003), p.620.

[6] F. Kroupa: Acta Technica CSAV 48 (2003), p.49. -0, 5 0 0, 5 1 1, 5 2 2, 5 3 0 0, 2 0, 4 0, 6 0, 8 1 x/h1 Szz 0. 9 0. 8 0. 7.