Montgomery, John K. and Faber, K. T. (2005) Processing and surface flaw tolerance of alumina bilayers. Journal of the American Ceramic Society, 88 (2). pp. 287-292. ISSN 0002-7820. doi:10.1111/j.1551-2916.2005.00073.x. https://resolver.caltech.edu/CaltechAUTHORS:20140908-181320949
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Abstract
Alumina bilayers of different relative thicknesses and densities were produced with a strong interface using a modified gel-casting technique. Tolerance to surface damage is examined using biaxial flexure of disks damaged with a single Vickers indentation at various loads. The greatest surface flaw tolerance is seen in bilayers consisting of a thin porous layer on the tensile surface coupled to a thick dense layer. Here, the modulus mismatch causes redistribution of the applied stress, and fracture initiates at the internal porous-dense interface rather than at the surface from the introduced indentation flaw.
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| Additional Information: | © 2005 The American Ceramic Society. Manuscript No. 186540. Received November 20, 2002; approved October 1, 2004. Supported by the National Science Foundation through Grant #DMR-9800257. Presented at the 104th Annual Meeting of the American Ceramic Society, St. Louis, MO, May 1, 2002. (Paper No. AMECD-B-01-2002). The authors thank Mark Seniw for assistance with mechanical testing, and Kristen Pappacena and Thomas Wilkes for assistance with fractography. | |||||||||
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| Issue or Number: | 2 | |||||||||
| DOI: | 10.1111/j.1551-2916.2005.00073.x | |||||||||
| Record Number: | CaltechAUTHORS:20140908-181320949 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20140908-181320949 | |||||||||
| Official Citation: | Montgomery, J. K. and Faber, K. T. (2005), Processing and Surface Flaw Tolerance of Alumina Bilayers. Journal of the American Ceramic Society, 88: 287–292. doi: 10.1111/j.1551-2916.2005.00073.x | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 49378 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | George Porter | |||||||||
| Deposited On: | 09 Sep 2014 15:01 | |||||||||
| Last Modified: | 10 Nov 2021 18:43 |
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