Abstract
The use of multiple cracking of brittle coatings on strained substrates were described. It was found that if crack density was measured as a function of applied strain at one coating thickness, it can be used to predict those for other coating thicknesses. The crack density versus applied strain relation was used to deduce the residual stress if the residual stress in the coating is unknown. A method to define the effective substrate thickness was also proposed and it was found useful in analytical modeling of the stress transfer phenomena in coating/substrate systems.
| Original language | English |
|---|---|
| Pages (from-to) | 3501-3506 |
| Number of pages | 6 |
| Journal | Journal of Applied Physics |
| Volume | 96 |
| Issue number | 6 |
| DOIs | |
| State | Published - Sep 15 2004 |
Funding
The authors thank Dr. P. F. Becher, Dr. M. K. Ferber, and Dr. M. J. Lance for reviewing the manuscript. This research was jointly sponsored by U.S. Department of Energy, Division of Materials Sciences and Engineering, Office of Basic Energy Sciences (CHH), and the Advanced Automotive Materials Program, DOE Office of Freedom CAR and Vehicle Technology Program (A.A.W.) under Contract No. DE-AC05-00OR22725 with UT-Battelle, LLC.