Elastic properties of porous oxide ceramics prepared using starch as a pore-forming agent

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F09%3A00021503" target="_blank" >RIV/60461373:22310/09:00021503 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985891:_____/09:00335445

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Elastic properties of porous oxide ceramics prepared using starch as a pore-forming agent

Popis výsledku v původním jazyce

The elastic properties, in particular the tensile modulus (Young's modulus) and Poisson ratio, of porous alumina, zirconia, and alumina-zirconia composite ceramics are studied using the resonance frequency method and the results compared with theoreticalpredictions. Starch is used as a pore-forming agent, so that the resulting microstruture is essentially of the matrix-inclusion type (wiht large bulk pores, connected by small throats when a percolation threshold is exceeded). It is found that for thistype of microstructure the porosity dependence of the Young's moldulus is significantly below the upper Hashin-Shtrikman bound and the power-law prediction; it corresponds well, however, to a recently proposed exponential relation and to an empirical volume-weighted average of the upper and lower Hahin-Shtrikman bound. Results for all three types of ceramics indicate that - in the porosity range considered, i.e. up to approximately 50% - the Poisson ratio depends only slightly on porosit

Název v anglickém jazyce

Elastic properties of porous oxide ceramics prepared using starch as a pore-forming agent

Popis výsledku anglicky

The elastic properties, in particular the tensile modulus (Young's modulus) and Poisson ratio, of porous alumina, zirconia, and alumina-zirconia composite ceramics are studied using the resonance frequency method and the results compared with theoreticalpredictions. Starch is used as a pore-forming agent, so that the resulting microstruture is essentially of the matrix-inclusion type (wiht large bulk pores, connected by small throats when a percolation threshold is exceeded). It is found that for thistype of microstructure the porosity dependence of the Young's moldulus is significantly below the upper Hashin-Shtrikman bound and the power-law prediction; it corresponds well, however, to a recently proposed exponential relation and to an empirical volume-weighted average of the upper and lower Hahin-Shtrikman bound. Results for all three types of ceramics indicate that - in the porosity range considered, i.e. up to approximately 50% - the Poisson ratio depends only slightly on porosit

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JH - Keramika, žáruvzdorné materiály a skla

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

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 periodika

Journal of the European Ceramic Society

ISSN

0955-2219

e-ISSN

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Svazek periodika

29

Číslo periodika v rámci svazku

13

Stát vydavatele periodika

BE - Belgické království

Počet stran výsledku

7

Strana od-do

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Kód UT WoS článku

000268401700013

EID výsledku v databázi Scopus

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