Phase mixture modeling of the grain size dependence of Young's modulus and thermal conductivity of alumina and zirconia ceramics

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F20%3A43921327" target="_blank" >RIV/60461373:22310/20:43921327 - isvavai.cz</a>
Result on the web
<a href="https://reader.elsevier.com/reader/sd/pii/S0955221920300790?token=5264A546DBBA6C3CD74A65FF938C8725B55A4C0D18519D0F0A2D5726219DF163FCC2118E14C3218EE27136F163B52FBB" target="_blank" >https://reader.elsevier.com/reader/sd/pii/S0955221920300790?token=5264A546DBBA6C3CD74A65FF938C8725B55A4C0D18519D0F0A2D5726219DF163FCC2118E14C3218EE27136F163B52FBB</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jeurceramsoc.2020.01.069" target="_blank" >10.1016/j.jeurceramsoc.2020.01.069</a>

Result language
angličtina
Original language name
Phase mixture modeling of the grain size dependence of Young's modulus and thermal conductivity of alumina and zirconia ceramics
Original language description
The grain size dependence of Young's modulus and thermal conductivity of alumina and zirconia ceramics is predicted via phase mixture modeling, using both analytical and numerical approaches. Using typical values for the thickness and properties of the grain boundaries, the equivalent volume fraction of "grain boundary phase" is calculated for a given grain shape. Based on this volume fraction estimate and a rough estimate of the grain boundary properties, the effective properties of the polycrystalline materials are calculated and compared in terms of volume-equivalent sphere diameters. For grains of cubic and tetrakaidecahedral shape excellent agreement is found between numerical calculations and analytical predictions based on the lower Hashin-Shtrikman bound. The grain size dependence is extremely weak for Young's modulus, but can be more significant for thermal conductivity, especially when the intrinsic conductivity of the material is high. The predictions are compared to literature data.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20504 - Ceramics

Project
<a href="/en/project/GA18-17899S" target="_blank" >GA18-17899S: Partially and fully sintered ceramics – processing, microstructure, properties, modeling and sintering theory</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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