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Transformation toughening of glass ceramics

Published online by Cambridge University Press:  31 January 2011

D. R. Clarke  and
B. Schwartz
D. R. Clarke
Affiliation:
IBM, Thomas J. Watson Research Center, Yorktown Heights, New York 10598
B. Schwartz
Affiliation:
IBM, Thomas J. Watson Research Center, Yorktown Heights, New York 10598
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Abstract

The utilization of transformation toughening has hitherto been restricted to increasing the fracture resistance of polycrystalline ceramic materials. Although a number of investigators have attempted to extend the concept to toughening glasses and glass ceramics with tetragonal zirconia, no successful reports have been published. It is argued that the approaches employed are inevitably limited primarily because they do not take into account the necessity of nucleating the tetragonal-to-monoclinic transformation away from the crack tip itself. By concentrating on the nucleation event and using standard ceramic processing techniques, it has been demonstated that transformation toughening can be used to increase the toughness of glass-ceramic materials, and this approach is illustrated by increasing the fracture toughness of a cordierite glass ceramic.

Type
Materials Communications
Information
Journal of Materials Research , Volume 2 , Issue 6 , December 1987 , pp. 801 - 804
Copyright
Copyright © Materials Research Society 1987

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References

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