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Weibull Modulus of Toughened Ceramics

Published online by Cambridge University Press:  25 February 2011

Kevin Kendall ,
N. McN Alford  and
J. D Birchall
Kevin Kendall
Affiliation:
ICI New Science Group, P.O.Box 11 The Heath, Runcorn, Cheshire, UK
N. McN Alford
Affiliation:
ICI New Science Group, P.O.Box 11 The Heath, Runcorn, Cheshire, UK
J. D Birchall
Affiliation:
ICI New Science Group, P.O.Box 11 The Heath, Runcorn, Cheshire, UK
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Abstract

The influence of toughness on the Weibull modulus of ceramics is discussed. It is shown that an increase in toughness does not give a higher Weibull modulus if the ceramic is truly brittle, following the Griffith criterion of fracture. However, R curve behaviour, such as that shown by tetragonal zirconia, by Dugdale material, or by fibrous ceramic composites, leads to an improved Weibull modulus. Theoretical argument and experimental results support these conclusions.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 78: Symposium E – Advances in Structural Ceramics , 1986 , 189
Copyright
Copyright © Materials Research Society 1987

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References

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