Effect of microstructure on the fracture behavior of biomorphous silicon carbide ceramics

Greil, Peter; Vogli, E.; Fey, Tobias; Bezold, Alexander; Popovska, N.; Gerhard, Helmut; Sieber, H.

doi:10.1016/s0955-2219(02)00135-8

Cited by 86 publications

(69 citation statements)

References 18 publications

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“…The Gibson and Ashby solid cellular model [11][12][13] is generally used to analyze the properties of bioceramics made from softwood (more than 70% porosity and relatively homogeneous distribution of pores), while the Rice model [14] is used for ceramics made from hardwood. Relative loading in this model is described as an exponential function of porosity:…”

Section: Vickers Hardness Measurementsmentioning

confidence: 99%

Mechanical properties of biomorphous ceramics

Kiselov¹

2012

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. Mechanical properties: The Vickers hardness and bending strength of porous biomorphic SiC (bioSiC) ceramics fabricated from different natural hardwoods were investigated. It has been found that these parameters are highly dependent on the geometrical densities of ceramics, and Vickers hardness values can be well described using the Ryskevitch-type equation. It has been shown that the data of geometrical density bio-SiC ceramics can be used to estimate mechanical parameters such as bending strength. Materials with advanced properties appropriate for surgical applications are being designed. Further ways to improve the mechanical properties of ceramics and ceramic products have been discussed.

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Section: Vickers Hardness Measurementsmentioning

confidence: 99%

Mechanical properties of biomorphous ceramics

Kiselov¹

2012

Semicond. Phys. Quantum Electron. Optoelectron.

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“…Biomorphous carbide ceramics are interesting candidates for advanced engineering applications due to their anisotropic cellular structures [16]. The anisotropic mechanical properties of these materials were thoroughly investigated [33][34][35][36]. Biomorphous ceramics exhibit a higher strength at similar porosities with respect to conventional materials due to their uniaxial directed cellular microstructure.…”

Section: Biomorphous Carbide Ceramics From Cardboardmentioning

confidence: 99%

Biotemplating: polysaccharides in materials engineering

Zollfrank¹

2010

WIT Transactions on Ecology and the Environment

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The generation of biominerals and hard tissue in nature is directed and templated by biomacromolecules. In many systems, polysaccharides play a significant role during the assembly of the inorganic phase. Polysaccharides exhibit a hierarchical multiscale order as well as self-assembly properties and they appear in a large variety of structures. The directed deposition of inorganic phases on polysaccharide templates is an interesting approach for the manufacturing of patterned functional materials. This paper highlights our recent developments on the bioinspired deposition and formation of inorganic phases on polysaccharide templates. Polysaccharides can be used at various structural levels from the molecular scale to three-dimensional parts in the millimetre range. The versatility of polysaccharide templating capabilities will be shown on onedimensional cellulose nanocrystals for formation of luminescent inorganic nanotubes for optoelectronic applications. The replication of complex plant tissue and processed lignocellulosic materials such as paper and cardboard into carbide based engineering and functional ceramics will be presented. The developed methods for the mineralisation of inorganic phases on polysaccharides are adapted for an innovative bioinspired route involving phototactic microorganisms, which are useful for the light-induced fabrication of hierarchically structured functional materials.

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“…En los últimos años se viene realizando un gran esfuerzo en investigación para mejorar el proceso de fabricación de este nuevo tipo de materiales biomórficos, así como para caracterizar el comportamiento mecánico de los materiales obtenidos (16)(17)(18)(19)(20)(21).…”

Section: Introductionunclassified

Microestructura y propiedades mecánicas del SiC biomórfico obtenido a partir de eucalipto

Presas¹,

Pastor²,

LLorca³

et al. 2005

Bol. Soc. Esp. Ceram. Vidr.

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El desarrollo de materiales cerámicos con una estructura de tipo celular, similar a la del hueso o la madera, ha sido una cuestión que ha suscitado un gran interés en los últimos años. Su atractivo se debe al hecho de poseer una estructura porosa altamente interconectada de baja densidad, perfeccionada por la evolución. En el caso del SiC biomórfico (bio-SiC) el proceso de fabricación es sencillo: se piroliza una pieza de madera y a continuación se inyecta con silicio líquido, el material así obtenido es un compuesto Si/SiC en el que el SiC mimetiza la estructura de la madera original. En este trabajo se estudian las propiedades mecánicas del SiC biomórfico fabricado a partir de eucalipto (madera dura con una distribución bimodal de poros). Se ha estudiado el comportamiento mecánico del mismo (resistencia a compresión, resistencia a flexión, tenacidad de fractura y módulo de elasticidad) entre 25 y 1350 o C. Asimismo, se discute la relación entre el comportamiento mecánico del material y su microestructura. Palabras clave: Comportamiento mecánico, microestructura, SiC biomórfico, alta temperatura. Microestructure and mechanical properties of biomorphic SiC obtained from eucalyptusThe development of cellular ceramics with a biological structure, like bones and wood, has been a matter of interest in recent years. A low density highly interconnected structure, perfected by evolution, rises as the principal advantage of these materials. In the case of biomimetic SiC (biomorphic SiC, or bioSiC), the fabrication process technique is quite simple: a piece of wood is pyrolysed and is infiltrated with molten silicon after, the final product is a composite Si/SiC, which replicates the wood anisotropic microstructure This work focus on the mechanical properties of bioSiC fabricated using eucalyptus wood as precursor (hard wood with a bimodal channel distribution). It has been studied the mechanical behavior of this bioSiC (compression strength, flexure strength, fracture toughness and elastic modulus) between 25 and 1350 o C. It is also discussed the relationship between mechanical behavior of the material and its microstructure.

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Effect of microstructure on the fracture behavior of biomorphous silicon carbide ceramics

Cited by 86 publications

References 18 publications

Mechanical properties of biomorphous ceramics

Mechanical properties of biomorphous ceramics

Biotemplating: polysaccharides in materials engineering

Microestructura y propiedades mecánicas del SiC biomórfico obtenido a partir de eucalipto

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