Effect of grain size on Hertzian contact damage in 9 mol% Ce-TZP ceramics

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dc.contributor.authorLatella, BAen_AU
dc.contributor.authorLiu, Ten_AU
dc.contributor.authorAtanacio, AJen_AU
dc.date.accessioned2020-09-01T22:31:11Zen_AU
dc.date.available2020-09-01T22:31:11Zen_AU
dc.date.issued2002-05-15en_AU
dc.date.statistics2020-08-13en_AU
dc.description.abstractThe Hertzian contact damage in 9 mol% Ce-TZP ceramics with different grain sizes has been investigated. Single-cycle tests were conducted on materials of four grain sizes, 1.1, 1.6, 2.2 and 3 μm. The indentation stress–strain curves for all materials show striking nonlinearity and deviation from the Hertzian elastic response, illustrating a significant quasi-plastic component in the contact damage response. Subsurface damage patterns for these four materials are compared and contrasted using a bonded-interface sectioning technique. The transformation and deformation behaviour, characterised using optical and scanning electron microscopy, of the surface and subsurface regions revealed extensive deformation and compression-driven subsurface damage in the materials. Acoustic emission was used as a complementary technique in order to identify the damage processes during a load–unload cycle. Contact deformation and radial bands extending from the indent impressions due to autocatalytic tetragonal–monoclinic transformation are evident in all except the finest grained (1.1 μm) material. Irrespective of grain size there is no evidence of ring or cone cracking with all material showing hemispherical subsurface damage or yield zones resulting from the stress-induced tetragonal–monoclinic (t–m) transformation with extensive distributed microcracking within these areas for the 1.6, 2.2 and 3 μm grain-size materials. © 2002 Elsevier Science Ltden_AU
dc.identifier.citationLatella, B. A., Liu, T., & Atanacio, A. J. (2002). Effect of grain size on Hertzian contact damage in 9 mol% Ce-TZP ceramics. Journal of the European Ceramic Society, 22(12), 1971-1979. doi:10.1016/S0955-2219(01)00527-1en_AU
dc.identifier.govdoc9882en_AU
dc.identifier.issn0955-2219en_AU
dc.identifier.issue12en_AU
dc.identifier.journaltitleJournal of the European Ceramic Societyen_AU
dc.identifier.pagination1971-1979en_AU
dc.identifier.urihttps://doi.org/10.1016/S0955-2219(01)00527-1en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/9738en_AU
dc.identifier.volume22en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectFracturesen_AU
dc.subjectStressesen_AU
dc.subjectMechanical propertiesen_AU
dc.subjectOptical microscopyen_AU
dc.subjectFracture propertiesen_AU
dc.subjectZirconiumen_AU
dc.titleEffect of grain size on Hertzian contact damage in 9 mol% Ce-TZP ceramicsen_AU
dc.typeJournal Articleen_AU
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