Parameters of Quasi-Impotent and Irreqular-Vibration Crystallization
V. D. Aleksandrova, S. A. Frolovaa, A. V. Sadomovab
a Donbas National Academy of Civil Engineering and Architecture
b Donetsk National University
Abstract: By the method of thermal analysis in the temperature – time coordinates, the regularities of changes in the pre-crystallization supercooling of bismuth during continuous thermal Cycling are studied. Using thermograms of bismuth fusibility obtained by thermal analysis, kinetic parameters were calculated for melting, as well as for quasi-equilibrium (KRK, without supercooling) and non-equilibrium-explosive (NRK, with supercooling) crystallizations. It is established that a significant difference in the parameters of quasi-equilibrium and nonequilibrium-the explosive crystallization is due to the fact that crystallization of type KRK almost falls of the stage of nucleation and the parameters such as the fraction of all nuclei in a supercooled melt; the proportion of the melt, solidified by coagulation, and are not involved in coagulation and nucleation throughout the volume, the solidified part of the sample; the degree of hypothermia ; the critical size of the embryo; the work of the formation of the embryo; the warmth of nucleation.
Keywords: bismuth, crystallization, hypothermia, thermograms of melting.
Pages: 71-74.
Link for citation: Aleksandrov, V. D.; Frolova, S. A.; Sadomova, A. V. Parameters of Quasi-Impotent and Irreqular-Vibration Crystallization. – Text : electronic. – In: Proceeding of the Donbas National Academy of Civil Engineering and Architecture. – 2020. – Issue 2020-4(144) Scientific and technical achievements of students of the construction and architectural industry. – Р. 71-74. – URL: https://donnasa.ru/publish_house/journals/vestnik/2020/2020-4(144)/st_14_alexandrov_frolova_sadomova.pdf (date of access: 15.10.2024). (in Russian)
Issue 2020-4 (144)Journal: Proceeding of the Donbas National Academy of Civil Engineering and Architecture
Publish house: Donbas National Academy of Civil Engineering and Architecture