Contact strength of ceramic laminates

Ceseracciu, Luca; Jiménez‐Piqué, E.; Fett, T.; Anglada, M.

doi:10.1016/j.compscitech.2007.04.020

Cited by 10 publications

(3 citation statements)

References 16 publications

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“…Refs. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. In these systems, effectiveness of this approach has been proven on the basis of enhanced fracture strength and toughness, damage tolerance and/or thermal shock resistance.…”

Section: Introductionmentioning

confidence: 97%

Nanoindentation of Al2O3/Al2TiO5 composites: Small-scale mechanical properties of Al2TiO5 as reinforcement phase

Botero

Jiménez‐Piqué

Baudı́n

et al. 2012

Journal of the European Ceramic Society

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Section: Introductionmentioning

confidence: 97%

Nanoindentation of Al2O3/Al2TiO5 composites: Small-scale mechanical properties of Al2TiO5 as reinforcement phase

Botero

Jiménez‐Piqué

Baudı́n

et al. 2012

Journal of the European Ceramic Society

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“…In the layered materials investigated, residual stresses develop during cooling down from sintering owed to the different thermal strain between adjacent layers. In the case of the ECSlaminates this is associated with the different thermal expansion coefficients [51], while in the case of the ICS-laminates is mainly caused by the t→m zirconia phase transformation [52]. According to Eq.…”

Section: Residual Stressesmentioning

confidence: 99%

“…5b, where the fracture starts from the surface. Nevertheless, FEM studies have revealed that, due to the tensile residual stresses associated with the contact loading, the maximal stress during application of load may be located in the internal tensile layers (near to the surface), leading to failure of the structure from internal flaws [58].…”

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confidence: 99%

Fracture of Layered Ceramics

Bermejo

Ceseracciu

Llanes

et al. 2009

KEM

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Layered ceramics are foreseen as possible substitutes for monolithic ceramics due to their attractive mechanical properties in terms of strength reliability and toughness. The different loading conditions to which ceramic materials may be subjected in service encourage the design of tailored layered structures as function of their application. The use of residual stresses generated during cooling due to the different thermal strain of adjacent layers has been the keystone for the improvement of the fracture response of many layered ceramic systems, e.g. alumina-zirconia, alumina-mullite, silicon nitride-titanium nitride, etc. In this work, the fracture features of layered ceramics are addressed analysing two multilayered structures, based on the alumina-zirconia system, designed with tailored compressive residual stresses either in the external or internal layers. Contact strength and indentation strength tests have been performed to investigate the response of both designs to crack propagation. The experimental findings show a different response in terms of strength and crack growth resistance of both designs. While layered structures with compressive stresses at the surface provide a better response against contact damage compared to monoliths, a flaw tolerant design in terms of strength and an improved toughness through energy release mechanisms is achieved with internal compressive stresses. The use of layered architectures for automotive or biomedical applications as substitutes for alumina-based ceramics should be regarded in the near future, where reliable ceramic designs are needed.

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