Fellow, American Ceramic Society.
Contact-induced Damage in Ceramic Coatings on Compliant Substrates: Fracture Mechanics and Design
Article first published online: 20 DEC 2004
Journal of the American Ceramic Society
Volume 84, Issue 5, pages 1066–1072, May 2001
How to Cite
Rhee, Y.-W., Kim, H.-W., Deng, Y. and Lawn, B. R. (2001), Contact-induced Damage in Ceramic Coatings on Compliant Substrates: Fracture Mechanics and Design. Journal of the American Ceramic Society, 84: 1066–1072. doi: 10.1111/j.1151-2916.2001.tb00791.x
G.M. Pharr—contributing editor
Supported by grants from the Korean Science and Engineering Foundation (author YWR) and the U.S. National Institute of Dental Research.
- Issue published online: 20 DEC 2004
- Article first published online: 20 DEC 2004
- Manuscript No. 188440. Received June 22, 2000; approved November 20, 2000.
- Hertzian cone cracks, strength, toughness
Simple explicit relations are presented for the onset of competing fracture modes in ceramic coatings on compliant substrates from Hertzian-like contacts. Special attention is given to a deleterious mode of radial cracking that initiates at the lower coating surface beneath the contact, in addition to traditional cone cracking and quasiplasticity in the near-contact area. The critical load relations are expressed in terms of well-documented material parameters (elastic modulus, toughness, hardness, and strength) and geometrical parameters (coating thickness and sphere radius). Data from selected glass, Al2O3 and ZrO2 coating materials on polycarbonate substrates are used to demonstrate the validity of the relations. The formulation provides a basis for designing ceramic coatings with optimum damage resistance.