Isothermal and adiabatic Young's moduli of alumina and zirconia ceramics at elevated temperatures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F13%3A43895868" target="_blank" >RIV/60461373:22310/13:43895868 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985891:_____/13:00420856

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2013.06.012" target="_blank" >http://dx.doi.org/10.1016/j.jeurceramsoc.2013.06.012</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2013.06.012" target="_blank" >10.1016/j.jeurceramsoc.2013.06.012</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Isothermal and adiabatic Young's moduli of alumina and zirconia ceramics at elevated temperatures

Popis výsledku v původním jazyce

The elastic moduli (Young moduli) of alumina and zirconia ceramics with porosities ranging from almost dense (2-3 %) to highly porous (46-52 %), the latter prepared with starch as a pore-forming agent, have been measured via impulse excitation and four-point bending tests from room temperature up to more than 1200 °C. It is shown that, independent of the temperature and the material, the porosity dependence of the Young?s modulus is well predicted by our exponential relation and that, irrespective of porosity, the temperature dependence follows a master curve that is characteristic of the material (for alumina exhibiting a decrease with a gradually growing tangent slope and for zirconia exhibiting a steep decrease with an inflection point at moderatelyelevated temperatures below 400 °C). Differences between isothermal (static) and adiabatic (dynamic) values are negligible as long as the materials are purely elastic (i.e. at temperatures below approximately 1000 °C).

Název v anglickém jazyce

Isothermal and adiabatic Young's moduli of alumina and zirconia ceramics at elevated temperatures

Popis výsledku anglicky

The elastic moduli (Young moduli) of alumina and zirconia ceramics with porosities ranging from almost dense (2-3 %) to highly porous (46-52 %), the latter prepared with starch as a pore-forming agent, have been measured via impulse excitation and four-point bending tests from room temperature up to more than 1200 °C. It is shown that, independent of the temperature and the material, the porosity dependence of the Young?s modulus is well predicted by our exponential relation and that, irrespective of porosity, the temperature dependence follows a master curve that is characteristic of the material (for alumina exhibiting a decrease with a gradually growing tangent slope and for zirconia exhibiting a steep decrease with an inflection point at moderatelyelevated temperatures below 400 °C). Differences between isothermal (static) and adiabatic (dynamic) values are negligible as long as the materials are purely elastic (i.e. at temperatures below approximately 1000 °C).

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

<a href="/cs/project/GAP108%2F12%2F1170" target="_blank" >GAP108/12/1170: Porézní keramika s řízenou elasticitou a tepelnou vodivostí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2013

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

33

Číslo periodika v rámci svazku

15-16

Stát vydavatele periodika

BE - Belgické království

Počet stran výsledku

9

Strana od-do

3085-3093

Kód UT WoS článku

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EID výsledku v databázi Scopus

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