Evolution equations for grain growth and coarsening

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F12%3A00385304" target="_blank" >RIV/68081723:_____/12:00385304 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Evolution equations for grain growth and coarsening
Original language description
A real classical topic of research for evolving systems of microstructures with grains like metals and ceramics is grain growth and coarsening (Ostwald Ripening). Both phenomena are driven by the decrease in total surface energy, while the chemical composition of the individual objects remains unchanged. Only the morphology of the system evolves and gives the impressions that smaller objects are ?eaten by the larger ones. Evolution equations for these phenomena were published in the last century mostlyas phenomenological equations. The authors have, however, shown that the evolution equations can be derived from the Thermodynamic Extremal Principle (TEP). This principle, based on the works of Onsager (1931, 1945) and later of H. Ziegler (1977), allowsto calculate the evolution equations of the state parameters, e.g. the effective radii of individual grains, precipitates etc., by maximizing the dissipation, expressed in a quadratic form of the kinetic parameters, with the constraint t
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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