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Название: On Spontaneous Dispersion as a Cause of Microstratification of Metal Melts
Авторы: Chikova, O. A.
Tsepelev, V. S.
Shmakova, K. Y.
Дата публикации: 2024
Издатель: Multidisciplinary Digital Publishing Institute (MDPI)
Библиографическое описание: Chikova, O., Tsepelev, V., & Shmakova, K. (2024). On Spontaneous Dispersion as a Cause of Microstratification of Metal Melts. Materials, 17(10), [2215]. https://doi.org/10.3390/ma17102215
Аннотация: The phenomenon of spontaneous dispersion is considered as the cause of the microstratification of metal melts. In a microstratification melt, a violation of long-range order in the arrangement of atoms (LRO) is observed, which corresponds to a dispersed particle size of more than 2 nm. Microseparation occurs due to spontaneous dispersion upon contact of liquid and solid metal or the mixing of two liquid metals. The possibility of spontaneous dispersion was assessed using three different criteria: Volmer’s cr iterion, Rehbinder’s criterion and the diffusion rate criterion. The diffusion rate criterion was obtained on the basis of the theory of rate processes, which describes how diffusing atoms overcome the interphase boundary. It has been established that Al–Sn melts contain colloidal-scale particles (4 nm), and Al–Si and Al–Ge melts contain atomic-scale particles (0.1 nm). For a system with a continuous series of Cu–Ni solid solutions in dispersion (Cu10Ni90—Cu20Ni80), the particle size is 2 nm. The particle size of the ternary eutectic GaInSn in the dispersion (Ga50In50—Ga50Sn50) is 5.6 nm, and the size of immiscible Cu–Fe melts in the dispersion (Cu80Fe20—Cu60Fe40) is 4.8 nm. Long-range order violations (LRO) and the presence of microlayering with colloidal particles larger than 20 nm were observed in the GaInSn ternary eutectic, in the Al–Sn simple eutectic with the preferential interaction of similar atoms, and in Cu–Fe melts with a monotectic phase diagram. © 2024 by the authors.
Ключевые слова: CRITERIA FOR TRUE (ENTROPIC) SPONTANEOUS DISPERSION
DISPERSED PARTICLES
LIQUID ALLOYS
MECHANISMS OF QUASI-SPONTANEOUS DISPERSION
METHODS AND RESULTS FOR ASSESSING SIZE OF DISPERSED PARTICLES
MICROSTRATIFICATION
SPONTANEOUS DISPERSION
ATOMS
BINARY ALLOYS
COPPER ALLOYS
DIFFUSION
EUTECTICS
INDIUM ALLOYS
IRON ALLOYS
LIQUID METALS
PARTICLE SIZE
SOLS
TERNARY ALLOYS
TIN ALLOYS
CRITERIA FOR TRUE (ENTROPIC) SPONTANEOUS DISPERSION
DISPERSED PARTICLE
LIQUID ALLOY
LONG RANGE ORDERS
MECHANISM OF QUASI-SPONTANEOUS DISPERSION
METHOD AND RESULT FOR ASSESSING SIZE OF DISPERSED PARTICLE
MICROSTRATIFICATION
PARTICLES SIZES
SPONTANEOUS DISPERSION
GALLIUM ALLOYS
URI: http://elar.urfu.ru/handle/10995/141723
Условия доступа: info:eu-repo/semantics/openAccess
cc-by
Идентификатор SCOPUS: 85194410041
Идентификатор WOS: 001231580900001
Идентификатор PURE: 57890140
ISSN: 1996-1944
DOI: 10.3390/ma17102215
Располагается в коллекциях:Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC

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