Strategies for fracture toughness, strength and reliability optimisation of ceramic-ceramic laminates

0370043 - ÚFM 2012 RIV DE eng J - Journal Article
Šestáková, L. - Bermejo, R. - Chlup, Zdeněk - Danzer, R.
Strategies for fracture toughness, strength and reliability optimisation of ceramic-ceramic laminates.
International Journal of Materials Research. Roč. 102, č. 6 (2011), s. 613-626. ISSN 1862-5282. E-ISSN 2195-8556
Institutional research plan: CEZ:AV0Z20410507
Keywords : Ceramic laminates * Layered ceramics * Residual stress * Fracture toughness * Threshold strength
Subject RIV: JL - Materials Fatigue, Friction Mechanics
Impact factor: 0.830, year: 2011

Layered ceramics are,compared to conventionalmono- lithicceramics,a good choicefor highly loaded structural applications havingimproved fracture toughness, strength and mechanical reliability. The useof tailored residual compressive stresses in the layers isthe key parameterto adjust theseproperties. In thiswork two types of ceramics are analysed whichhaveexternal(ECS-laminates)or inter- nal(ICS-laminates) compressive stresses. The most impor- tant factors havinginfluenceon the strength and toughness of theselaminates arediscussed. Clearrecommendations on the properselectionof a suitable mismatch strain, vol- ume ratio of the layer materials and thickness and distribu- tion of individuallayers aregiven, eitherto achieve a high toughness and/or a high lower limit (threshold)forstrength.
Permanent Link: http://hdl.handle.net/11104/0203956