A novel biomimetic approach to the design of high-performance ceramic–metal composites

Launey, Maximilien E.; Munch, Étienne; Alsem, Daan Hein; Saiz, Eduardo; Tomsia, Antoni P.; Ritchie, Robert O.

doi:10.1098/rsif.2009.0331

Cited by 246 publications

(124 citation statements)

References 89 publications

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“…This structural material exhibits a toughness (in energy terms) some orders of magnitude higher than that of its primary component (CaCO 3 ), and its strength is among the highest in shell structures [1][2][3]. Inspired by this structure, there have been significant efforts in the past decades to synthesize new materials with mechanical performance comparable to nacre in the past decades [4][5][6][7][8][9][10][11][12][13][14][15]. The essence of success is to understand the deformation mechanisms inherent in nacre.…”

Section: Introductionmentioning

confidence: 99%

Toughening mechanisms in bioinspired multilayered materials

Askarinejad

Rahbar

2015

J. R. Soc. Interface.

123

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Outstanding mechanical properties of biological multilayered materials are strongly influenced by nanoscale features in their structure. In this study, mechanical behaviour and toughening mechanisms of abalone nacre-inspired multilayered materials are explored. In nacre's structure, the organic matrix, pillars and the roughness of the aragonite platelets play important roles in its overall mechanical performance. A micromechanical model for multilayered biological materials is proposed to simulate their mechanical deformation and toughening mechanisms. The fundamental hypothesis of the model is the inclusion of nanoscale pillars with near theoretical strength (s th E/30). It is also assumed that pillars and asperities confine the organic matrix to the proximity of the platelets, and, hence, increase their stiffness, since it has been previously shown that the organic matrix behaves more stiffly in the proximity of mineral platelets. The modelling results are in excellent agreement with the available experimental data for abalone nacre. The results demonstrate that the aragonite platelets, pillars and organic matrix synergistically affect the stiffness of nacre, and the pillars significantly contribute to the mechanical performance of nacre. It is also shown that the roughness induced interactions between the organic matrix and aragonite platelet, represented in the model by asperity elements, play a key role in strength and toughness of abalone nacre. The highly nonlinear behaviour of the proposed multilayered material is the result of distributed deformation in the nacre-like structure due to the existence of nano-asperities and nanopillars with near theoretical strength. Finally, tensile toughness is studied as a function of the components in the microstructure of nacre.

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Section: Introductionmentioning

confidence: 99%

Toughening mechanisms in bioinspired multilayered materials

Askarinejad

Rahbar

2015

J. R. Soc. Interface.

123

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“…In recent years, materials scientists have started to consider the complex hierarchical structure of natural materials as a model for the development of new types of high-performance engineering materials [23,[137][138][139][140][141][142][143][144][145]. In biomaterials, a dynamic strategy is realized.…”

Section: Adaptive/smart Coatings: Previous Artmentioning

confidence: 99%

Hierarchical adaptive nanostructured PVD coatings for extreme tribological applications: the quest for nonequilibrium states and emergent behavior

Fox-Rabinovich

Yamamoto

Beake

et al. 2012

Science and Technology of Advanced Materials

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Adaptive wear-resistant coatings produced by physical vapor deposition (PVD) are a relatively new generation of coatings which are attracting attention in the development of nanostructured materials for extreme tribological applications. An excellent example of such extreme operating conditions is high performance machining of hard-to-cut materials. The adaptive characteristics of such coatings develop fully during interaction with the severe environment. Modern adaptive coatings could be regarded as hierarchical surface-engineered nanostructural materials. They exhibit dynamic hierarchy on two major structural scales: (a) nanoscale surface layers of protective tribofilms generated during friction and (b) an underlying nano/microscaled layer. The tribofilms are responsible for some critical nanoscale effects that strongly impact the wear resistance of adaptive coatings. A new direction in nanomaterial research is discussed: compositional and microstructural optimization of the dynamically regenerating nanoscaled tribofilms on the surface of the adaptive coatings during friction. In this review we demonstrate the correlation between the microstructure, physical, chemical and micromechanical properties of hard coatings in their dynamic interaction (adaptation) with environment and the involvement of complex natural processes associated with self-organization during friction. Major physical, chemical and mechanical characteristics of the adaptive coating, which play a significant role in its operating properties, such as enhanced mass transfer, and the ability of the layer to provide dissipation and accumulation of frictional energy during operation are presented as well. Strategies for adaptive nanostructural coating Topical Review design that enhance beneficial natural processes are outlined. The coatings exhibit emergent behavior during operation when their improved features work as a whole. In this way, as higher-ordered systems, they achieve multifunctionality and high wear resistance under extreme tribological conditions.

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“…Some novel materials with improved strength and toughness have been successfully produced by mimicking the 'brick-and-mortar' microstructure of nacre [31][32][33][34][35][36][37]. Some synthetic techniques inspired from biological materials have also been proposed to design novel materials [24,38 -40].…”

Section: Introductionmentioning

confidence: 99%

On flaw tolerance of nacre: a theoretical study

Shao

Zhao

Feng

2014

J. R. Soc. Interface.

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As a natural composite, nacre has an elegant staggered 'brick-and-mortar' microstructure consisting of mineral platelets glued by organic macromolecules, which endows the material with superior mechanical properties to achieve its biological functions. In this paper, a microstructure-based crack-bridging model is employed to investigate how the strength of nacre is affected by preexisting structural defects. Our analysis demonstrates that owing to its special microstructure and the toughening effect of platelets, nacre has a superior flaw-tolerance feature. The maximal crack size that does not evidently reduce the tensile strength of nacre is up to tens of micrometres, about three orders higher than that of pure aragonite. Through dimensional analysis, a nondimensional parameter is proposed to quantify the flaw-tolerance ability of nacreous materials in a wide range of structural parameters. This study provides us some inspirations for optimal design of advanced biomimetic composites.

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A novel biomimetic approach to the design of high-performance ceramic–metal composites

Cited by 246 publications

References 89 publications

Toughening mechanisms in bioinspired multilayered materials

Toughening mechanisms in bioinspired multilayered materials

Hierarchical adaptive nanostructured PVD coatings for extreme tribological applications: the quest for nonequilibrium states and emergent behavior

On flaw tolerance of nacre: a theoretical study

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