Correlations between flaw tolerance and reliability in zirconia

Interrelations between flaw tolerance and reliability in Y-TZP, Ce-TZP and Mg-PSZ ceramics are investigated. Indentation-strength tests indicate an enhanced flaw tolerance with increasing R-curve behaviour from tetragonal to monoclinic transformation. The Weibull modulus of unindented specimens incr...

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Bibliographic Details
Published in:	Journal of materials science Vol. 28; no. 24; pp. 6748 - 6752
Main Authors:	READEY, M. J, MCCALLEN, C. L, MCNAMARA, P. D, LAWN, B. R
Format:	Journal Article
Language:	English
Published:	Heidelberg Springer 01-01-1993
Subjects:	Applied sciences Building materials. Ceramics. Glasses Ceramic industries Chemical industry and chemicals Exact sciences and technology Technical ceramics Tetragonal lattices Magnesium oxide Polycrystal Mechanical properties Stabilized zirconia Cerium oxide Experimental study Indentation Oxide ceramics Structural ceramic Zirconium oxide Defect Yttrium oxide Reliability Weibull distribution Microstructure
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Summary:	Interrelations between flaw tolerance and reliability in Y-TZP, Ce-TZP and Mg-PSZ ceramics are investigated. Indentation-strength tests indicate an enhanced flaw tolerance with increasing R-curve behaviour from tetragonal to monoclinic transformation. The Weibull modulus of unindented specimens increases with the enhanced tolerance. However, even the most tolerant zirconias show persistent scatter in strength, implying that variability in material microstructure may be as important as variability in flaw size in reliability evaluation of these materials. 28 refs.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0022-2461 1573-4803
DOI:	10.1007/bf00356426