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R-curve measurements in PSZ ceramics

Published online by Cambridge University Press:  31 January 2011

S. Srinivasan  and
R. O. Scattergood
S. Srinivasan
Affiliation:
Materials Science and Engineering Department, North Carolina State University, Raleigh, North Carolina 27695-7907
R. O. Scattergood
Affiliation:
Materials Science and Engineering Department, North Carolina State University, Raleigh, North Carolina 27695-7907
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Abstract

An indentation-bend failure-stress method was used for measurement of R-curves in a series of PSZ ceramics with varying peak toughness. Dilatational transformation-stress constraints are included in the residual-stress driving force contribution to the applied stress intensity factor. A power-law fit to the form of the R-curve simplifies the analysis. While the resulting curves show the expected form, measured toughness values are high relative to the expected peak toughness. Limitations and the range of applicability of the indentation-bend technique are discussed.

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Articles
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Journal of Materials Research , Volume 5 , Issue 7 , July 1990 , pp. 1490 - 1495
Copyright
Copyright © Materials Research Society 1990

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