Properties of porous ceramics and phase mixture models for nanoceramics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F09%3A00022162" target="_blank" >RIV/60461373:22310/09:00022162 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Properties of porous ceramics and phase mixture models for nanoceramics

Popis výsledku v původním jazyce

For several types of microstructures the effective properties of porous ceramics can be predicted using power laws or exponential relations, apart from the universally valid rigorous bounds (Voigt, Wiener, Hashin-Shtrikman). In this contribution these relations, as well as a new empirical relation (sigmoidal average), are recalled for the Young's modulus and thermal conductivity. Further, phase mixture models based on the rigorous bounds are used to estimate the grain size dependence of the Young's modulus and thermal conductivity for nanocrystalline ceramics, using cubic and tetrakaidecahedral cells. It is shown that for the Young's modulus (where the phase property contrast is typically close to unity) the prediction is quite sharp but the grain sizeeffect is small, whereas for thermal conductivity (where the phase property contrast may be far away from unity) the grain size effect can be large. An equivalent porosity concept is proposed to assess the relative importance of grain si

Název v anglickém jazyce

Properties of porous ceramics and phase mixture models for nanoceramics

Popis výsledku anglicky

For several types of microstructures the effective properties of porous ceramics can be predicted using power laws or exponential relations, apart from the universally valid rigorous bounds (Voigt, Wiener, Hashin-Shtrikman). In this contribution these relations, as well as a new empirical relation (sigmoidal average), are recalled for the Young's modulus and thermal conductivity. Further, phase mixture models based on the rigorous bounds are used to estimate the grain size dependence of the Young's modulus and thermal conductivity for nanocrystalline ceramics, using cubic and tetrakaidecahedral cells. It is shown that for the Young's modulus (where the phase property contrast is typically close to unity) the prediction is quite sharp but the grain sizeeffect is small, whereas for thermal conductivity (where the phase property contrast may be far away from unity) the grain size effect can be large. An equivalent porosity concept is proposed to assess the relative importance of grain si

Druh

D - Stať ve sborníku

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

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Projekt

<a href="/cs/project/IAA401250703" target="_blank" >IAA401250703: PORÉZNÍ KERAMIKA, KERAMICKÉ KOMPOZITY A NANOKERAMIKA</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 11th International Conference and Exhibition of the European Ceramic Society

ISBN

978-83-60958-54-4

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

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Název nakladatele

Polish Ceramic Society

Místo vydání

Krakov

Místo konání akce

Krakov (Polsko)

Datum konání akce

21. 6. 2009

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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