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Brittle Composites Modeling: Compazisons with MoSi2/ZrO2

Published online by Cambridge University Press:  25 February 2011

S. P. Chen ,
R. Lesar  and
A. D. Rollett
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
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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
Information
MRS Online Proceedings Library (OPL) , Volume 322: Symposium F – High-Temperature Silicides and Refractory Alloys , 1993 , 229
Copyright
Copyright © Materials Research Society 1994

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References

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