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Microcracking and R-curve behavior in SiC-TiB_2 composites

Gu, W.-H. and Faber, K. T. and Steinbrech, R. W. (1992) Microcracking and R-curve behavior in SiC-TiB_2 composites. Acta Metallurgica et Materialia, 40 (11). pp. 3121-3128. ISSN 0956-7151. doi:10.1016/0956-7151(92)90475-T. https://resolver.caltech.edu/CaltechAUTHORS:20140908-181328925

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Abstract

The fracture toughness of SiC-TiB_2 composites is studied as a function of TiB_2 size and fraction with emphasis on the effect of stress-induced microcracking. R-curve behavior in these materials is observed from double cantilever beam tests and is found to be a major strength-controlling factor. The microcrack process zones are confirmed by both small angle X-ray scattering and transmission electron microscopy. The process zone size scales with the fraction of TiB_2 present. For composites containing fine TiB_2 particles, quasi-catastrophic crack growth and arrest are observed during R-curve measurements. The various contributions to the R-curve are discussed.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/0956-7151(92)90475-TDOIArticle
http://www.sciencedirect.com/science/article/pii/095671519290475TPublisherArticle
ORCID:
AuthorORCID
Faber, K. T.0000-0001-6585-2536
Alternate Title:Microcracking and R-curve behavior in SiC-TiB2 composites
Additional Information:Copyright © 1992 Pergamon. (Received 20 August 1991; in revised form 6 March 1992). Materials for this study were graciously provided by the Carborundum Company, Niagara Falls, N.Y. This work was supported by the National Science Foundation under Grant No. DMR-8896212. RWS wishes to thank E. Babilon for conducting the SAXS measurements and G. Kleist for many stimulating discussions on microcrack governed R-curve behavior.
Funders:
Funding AgencyGrant Number
NSFDMR-8896212
Issue or Number:11
DOI:10.1016/0956-7151(92)90475-T
Record Number:CaltechAUTHORS:20140908-181328925
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140908-181328925
Official Citation:W.-H. Gu, K.T. Faber, R.W. Steinbrech, Microcracking and R-curve behavior in SiC-TiB2 composites, Acta Metallurgica et Materialia, Volume 40, Issue 11, November 1992, Pages 3121-3128, ISSN 0956-7151, http://dx.doi.org/10.1016/0956-7151(92)90475-T. (http://www.sciencedirect.com/science/article/pii/095671519290475T)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49436
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:10 Sep 2014 15:14
Last Modified:10 Nov 2021 18:44

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