Effective fracture toughness in Al2O3–Al2O3/ZrO2 laminates

Lube, Tanja; Pascual, Javier; Chalvet, Francis; Portu, Goffredo de

doi:10.1016/j.jeurceramsoc.2006.04.063

Cited by 64 publications

(41 citation statements)

References 14 publications

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“…The wear of the YTZP and alumina monoliths was similar to those previously described for similar materials [17,35].…”

Section: Resultssupporting

confidence: 78%

“…For instance, alumina-YTZP symmetrical laminated structures in which surface alumina layers are subjected to compressive residual stresses show hardness values similar to those of monophase alumina combined with improved apparent surface fracture toughness and fracture strength [15][16][17], These laminated structures have a great potential for applications involving wear processes [18].…”

Section: Introductionmentioning

confidence: 99%

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Processing of alumina-coated tetragonal zirconia materials and their response to sliding wear

Bueno

Ferrari

Melandri

et al. 2010

Ceramics International

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“…The wear of the YTZP and alumina monoliths was similar to those previously described for similar materials [17,35].…”

Section: Resultssupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Processing of alumina-coated tetragonal zirconia materials and their response to sliding wear

Bueno

Ferrari

Melandri

et al. 2010

Ceramics International

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“…aspects related to toughness [3,4,61,112,113] and the increase of toughness with crack growth (R-curve behaviour [3,4,114,115] ), the influence of internal stresses on toughness [116,117] and strength, [118,119] or all aspects related to layered materials, [120][121][122][123] graded materials [124] and composites. Each of these topics, and several others, would be worthy of a separate section by themselves.…”

Section: Discussionmentioning

confidence: 99%

Fracture of Ceramics

et al. 2008

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The paper reviews the current state of art of the fracture of brittle ceramic materials. Typical loading situations (thermal shock, contact damage) are analysed and the resulting fracture modes are discussed. In focus of the paper are the brittle fracture and the resulting probabilistic aspects. The delayed failure of brittle materials (sub critical crack growth and cyclic fatigue) is also discussed.

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“…In particular, there is nowadays a great effort to design and fabricate ceramic materials following the so called biomimetic approach, which consists in fabricating hierarchical structures through artificial methods mimicking natural bio-structures, which in most of the cases present a failure behaviour that significantly overcome that of the individual components (26)(27). In this sense, anisotropic materials on a macroscopic level have been developed (7,(28)(29)(30)(31)(32). Materials formed by a combination of layers of different microstructures (7,(28)(29)(30) and materials fabricated by directional solidification of compositions close to eutectic ones (31-32) offer improved behaviour in comparison with the behaviour of monolithic materials with the same microstructure as that of the constituents.…”

Section: Toughening Mechanismsmentioning

confidence: 99%

“…In this sense, anisotropic materials on a macroscopic level have been developed (7,(28)(29)(30)(31)(32). Materials formed by a combination of layers of different microstructures (7,(28)(29)(30) and materials fabricated by directional solidification of compositions close to eutectic ones (31-32) offer improved behaviour in comparison with the behaviour of monolithic materials with the same microstructure as that of the constituents. Another relatively new wide field of investigation, initially proposed by Niihara (33), is that of ceramic nanocomposites, materials with a dispersed second phase that exhibits a submicron and/or nanometric scale, and which show an increase of the strength and wear performance as compared to that exhibited by the matrix materials (33-34).…”

Section: Toughening Mechanismsmentioning

confidence: 99%

Comportamiento mecánico de materiales cerámicos estructurales

Bueno¹,

Baudı́n²

2007

Bol. Soc. Esp. Ceram. Vidr.

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The use of ceramic materials in structural applications is limited by the lack of reliability associated with brittle fracture behaviour. In order to extend the structural use of ceramics, the design of microstructures which exhibit flaw tolerance due to toughening mechanisms which produce an increase in crack growth resistance during crack propagation has been proposed. This work is a review of the mechanical behaviour of structural ceramic materials and its characterisation. Firstly, the basic brittle fracture parameters and the statistical criteria to determine the probability of exceeding the safety factors demanded for a particular application are analysed. Then, the toughening mechanisms which can be developed in the materials through microstructural design as well as the mechanical characterisation of toughened ceramics are discussed. The experimental values of linear elastic fracture toughness parameters (critical stress intensity factor, K IC , and critical energy release rate, G IC ) are not intrinsic properties for toughened materials and depend on crack length and the loading system. In this work, the different mechanical parameters proposed to characterise such materials are reviewed. The following fracture parameters are analysed: work of fracture (γ WOF ), critical J-integral value (J IC ) and R-curve. For the determination, stable fracture tests are proposed in order to ensure that the energy provided during the test is no more than the necessary one for crack propagation.Keywords: Microstructure, Strength, Weibull modulus, Fracture toughness, Toughening mechanisms. Comportamiento mecánico de materiales cerámicos estructuralesEl uso de los materiales cerámicos en aplicaciones estructurales está limitado por la falta de fiabilidad asociada a su comportamiento frágil durante la fractura. Para extender su aplicación se ha propuesto el diseño de microestructuras que presenten tolerancia a los defectos debido a la actuación de mecanismos de refuerzo. Este trabajo es una puesta al día sobre el estudio del comportamiento mecánico de los materiales cerámicos estructurales y su caracterización. En primer lugar, se revisan los parámetros de fractura utilizados para caracterizar materiales frágiles y los criterios de control estadístico que permiten determinar la probabilidad de que se sobrepasen los factores de seguridad exigidos en cada aplicación. A continuación, se discuten los mecanismos de refuerzo que se pueden desarrollar en los materiales cerámicos a través del diseño microestructural. En los materiales cerámicos en los que la actuación de mecanismos de refuerzo conduce a un comportamiento significativamente distinto del puramente frágil, los parámetros derivados del tratamiento lineal elástico (factor crítico de intensidad de tensiones, K IC , y tasa crítica de liberación de energía, G IC ), determinados experimentalmente, dejan de ser propiedades intrínsecas del material, independientes del tamaño de grieta y el sistema de carga. El presente trabajo revisa los parámetros mecánicos propuestos para...

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Effective fracture toughness in Al2O3–Al2O3/ZrO2 laminates

Cited by 64 publications

References 14 publications

Processing of alumina-coated tetragonal zirconia materials and their response to sliding wear

Processing of alumina-coated tetragonal zirconia materials and their response to sliding wear

Fracture of Ceramics

Comportamiento mecánico de materiales cerámicos estructurales

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