NDLI: The effect of Vickers hardness indentations on the fracture mode in 8 mol% yttria-stabilised zirconia

Content Provider	Springer Nature Link
Author	Vandermeulen, Willy Bosch, Rik Wouter Snijkers, Frans
Copyright Year	2015
Abstract	Cubic 8 mol% Y$_{2}$O$_{3}$-stabilised ZrO$_{2}$ is well known for its good oxygen conductivity and therefore it is used in fuel cells, as oxygen sensor for liquid metals and as pH sensor in high temperature water. As a part of its fracture toughness assessment, the crack system caused by Vickers hardness indentations was examined by breaking specimens along an indentation diagonal. It was found that, although the normally observed fracture mode is transgranular, intergranular fracture occurred in the zone below an indentation. Annealing the specimen above 900 °C before breaking caused the disappearance of this effect. The intergranular fracture mode was explained by the combined effect of plastic deformation under the indentation and environmental humidity. Annealing is expected to cause restoration to the un-deformed structure. Observations on the intergranular and transgranular cracking pattern, slow crack growth occurrence and step formation at the fracture surface, are reported.
Starting Page	2932
Ending Page	2943
Page Count	12
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	50
Issue Number	7
e-ISSN	15734803
Language	English
Publisher	Springer US
Publisher Date	2015-01-29
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Materials Science Characterization and Evaluation of Materials Polymer Sciences Continuum Mechanics and Mechanics of Materials Crystallography Mechanics
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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