Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-25T17:37:28.525Z Has data issue: false hasContentIssue false

Brittle Composites Modeling: Compazisons with MoSi2/ZrO2

Published online by Cambridge University Press:  25 February 2011

S. P. Chen
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545, USA
R. Lesar
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545, USA
A. D. Rollett
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545, USA
Get access

Abstract

We have calculated the mechanical properties of brittle composites with spring-network (SN) model. The composites that we studied involve the transformation toughening effects and the accompanying micro-cracking. Our simulation results are consistent with experiments of MoSi2 toughened with ZrO2. By monitoring the stress changes due to the transformation and micro-cracking we are able to separate, for the first time, the contributions from these two competing effects. We also found that the fracture toughness of the composite increases as the modulus, interfacial cohesion of particle increases.

Type
Research Article
Copyright
Copyright © Materials Research Society 1994

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

References:

1. Evans, A. G., J. Am. Ceram. Soc., 73, 187 (1990).Google Scholar
2. Green, D. J., Hannink, R. H. J., and Swain, M. V., “Transformation Toughening of Ceramics”, CRC Press, Boca Raton, Florida (1989).Google Scholar
3. Ashby, M. F., Acta Metall. et Mat., 41, 1313 (1993).Google Scholar
4. Chen, S. P., J. Mat. Res. (submitted).Google Scholar
5. Chen, S. P., Lesar, R. and Rollett, A. D., Scr. Met. et Mat., 28, 1393 (1993).Google Scholar
6. Wade, R. K. and Petrovic, J. J., J. Am. Ceram. Soc., 75, 1682 (1992).Google Scholar
7. , Petrovicet al, Mat. Sci. Eng. A155, 259 (1992).Google Scholar
8. Lange, F. F., J. Mat. Sci., 17, 225 (1982).Google Scholar
9. Evans, A. and Cannon, R., Acta Metall., 34, 761 (1986).Google Scholar
10. Kriven, W. M., J. Amer. Ceram. Soc., 71, 1021 (1988).Google Scholar
11. Evans, A. G.et al, Acta Metall., 29, 447 (1981).Google Scholar
12. Evans, A. G. and Heuer, A. H., J. Am. Ceram. Soc., 63, 241 (1980).Google Scholar