Published November 1992
| public
Journal Article
Microcracking and R-curve behavior in SiC-TiB_2 composites
- Creators
- Gu, W.-H.
-
Faber, K. T.
- Steinbrech, R. W.
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.
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.Additional details
- Alternative title
- Microcracking and R-curve behavior in SiC-TiB2 composites
- Eprint ID
- 49436
- DOI
- 10.1016/0956-7151(92)90475-T
- Resolver ID
- CaltechAUTHORS:20140908-181328925
- DMR-8896212
- NSF
- Created
-
2014-09-10Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field