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Processing and surface flaw tolerance of alumina bilayers

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.


Item Type:Article
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URLURL TypeDescription
http://dx.doi.org/10.1111/j.1551-2916.2005.00073.xDOIArticle
http://onlinelibrary.wiley.com/doi/10.1111/j.1551-2916.2005.00073.x/abstractPublisherArticle
ORCID:
AuthorORCID
Faber, K. T.0000-0001-6585-2536
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.
Funders:
Funding AgencyGrant Number
NSFDMR-9800257
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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