Size distribution and growth rate of crystal nuclei near critical supercooling in small volumes

0483535 - FZÚ 2018 RIV SK eng A - Abstrakt
Kožíšek, Zdeněk
Size distribution and growth rate of crystal nuclei near critical supercooling in small volumes.
Book of Abstracts of the 27th Joint Seminar Development of Materials Science in Research and Education DMS-RE2017. Bratislava: Slovak Expert Group of Solid State Chemistry and Physics, 2017 - (Behúlová, M.; Kožíšek, Z.; Papánková, B.). s. 26-26. ISBN 978-80-89597-67-3.
[Joint Seminar Development of Materials Science in Research and Education /27./. 04.09.2017-08.09.2017, Kežmarské Žl’aby]
Grant CEP: GA MŠMT LD15004
Institucionální podpora: RVO:68378271
Klíčová slova: nucleation kinetics * small systems
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
https://dms.fzu.cz/27/downloads/DMSRE27_absbook.pdf

Kinetic equations are numerically solved to determine the size distribution of crystal nuclei, F, formed in Ni droplets near critical supercooling. The maximum size of nuclei r max was determined from F as a function of time and the growth rate of the largest particles v=dr max /dt. In the sufficiently large volumes of the parent phase, the growth rate of particles v reaches some minimum value and then increases with time to the growth rate of the flat interface limit. In smaller volumes, only a certain maximum size of nuclei r max is reached, which quickly increases with supercooling. In consequence of depletion of the parent phase, the growth of the largest particles is stopped in small volumes. The growth of nuclei occurs only when the number of critical nuclei is sufficiently high.
Trvalý link: http://hdl.handle.net/11104/0278795