. . "http://www.isvav.cz/projectDetail.do?rowId=GA202/02/0916"^^ . . . "The method of in situ observation of grain boundary motion using synchrotron radiation yields much more data than classical measurements with cyclic heating and cooling to the temperature of observation in optical microscope. Moreover, X-ray topography e"@en . . "Migrace hranic zrn je z\u00E1kladn\u00EDm mechanizmem takov\u00FDch proces\u016F jako je rekrystalizace a r\u016Fst zrn a ur\u010Duje tak technologicky d\u016Fle\u017Eit\u00E9 vlastnosti polykrystalick\u00FDch materi\u00E1l\u016F. Pro pochopen\u00ED jej\u00ED fyzik\u00E1ln\u00ED podstaty je nutn\u00E9 prov\u00E1d\u011Bt experimenty na dob\u0159e definovan\u00FDch vzorc\u00EDch jako jsou bikrystaly, kde jsou hranice zrn pln\u011B charakterizov\u00E1ny. C\u00EDlem projektu je zlep\u0161it sou\u010Dasnou znalost migrace hranic zrn pomoc\u00ED kombinovan\u00E9ho experiment\u00E1ln\u00EDho a teoretick\u00E9ho studia. Krom\u011B klasick\u00FDch experiment\u016F s cyklick\u00FDm oh\u0159evem a ochlazov\u00E1n\u00EDm navrhujeme p\u0159\u00EDm\u00E1 pozorov\u00E1n\u00ED pohybuj\u00EDc\u00ED se hranice zrn in situ s vyu\u017Eit\u00EDm synchrotronov\u00E9ho z\u00E1\u0159en\u00ED v European Synchrotron Radiation Facility v Grenoblu. Pomoc\u00ED rentgenovsk\u00E9 difrak\u010Dn\u00ED topografie bude pozorov\u00E1n nejen tvar migruj\u00EDc\u00ED hranice, ale i jej\u00ED interakce s poruchami v okoln\u00EDch krystalech. Sou\u010D\u00E1st\u00ED teoretick\u00FDch prac\u00ED bude pou\u017Eit\u00ED metody bun\u011B\u010Dn\u00FDch automat\u016F. Kinetika pohybu hranic zrn bude modelov\u00E1na jako proces vznikaj\u00EDc\u00ED na z\u00E1klad\u011B lok\u00E1ln\u00EDch interakc\u00ED. Tento proces m\u00E1" . . "Grain boundary migration"@en . . . "2008-06-02+02:00"^^ . . "Neuvedeno."@en . "GA202/02/0916" . . . "0"^^ . . "0"^^ . . "Migrace hranic zrn" . "1"^^ . . . "11"^^ . . "Grain boundary migration is a fundamental mechanism of such processes as recrystallization and grain growth, and determines thus technologically important properties of polycrystalline materials. In order to understand its physical basis, the experimental data have to be collected on well-defined samples such as bicrystals where the grain boundary can be fully characterized. The aim of this project is to improve the present knowledge of grain boundary migration by a combined experimental and theoretical study. In addition to conventional experiments of cycling heating and cooling, in situ direct observation of a moving grain boundary using synchrotron radiation at European Synchrotron Radiation Facility in Grenoble is proposed. Besides the migrating boundary shape, the interaction with imperfections in the neighbouring crystals will be observed by X-ray diffraction topography. Theoretical modelling will include application of the method of cellular automata. Kinetics of the grain boundary"@en . . . "11"^^ . . . "Bylo uk\u00E1z\u00E1no, \u017Ee metoda in situ pozorov\u00E1n\u00ED pohybu hranice zrn pomoc\u00ED synchrotronov\u00E9ho z\u00E1\u0159en\u00ED poskytuje mnohem podrobn\u011Bj\u0161\u00ED \u00FAdaje ne\u017E klasick\u00E1 m\u011B\u0159en\u00ED s\u00A0cyklick\u00FDm oh\u0159evem a ochlazov\u00E1n\u00EDm na teplotu pozorov\u00E1n\u00ED v\u00A0optick\u00E9m mikroskopu. Nav\u00EDc rentgenov\u00E1 topografi"@cs . .