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Wyszukujesz frazę "coupled eutectic growth" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Development of the Jackson and Hunt Theory for Rapid Eutectic Growth
Autorzy:
Wołczyński, W.
Powiązania:
https://bibliotekanauki.pl/articles/353984.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Jackson and Hunt theory
diffusion equation
coupled eutectic growth
Aziz’s theory
oscillatory mode of eutectic growth
Opis:
A development of the Jackson-Hunt’s theory is delivered. Contrary to Jackson-Hunt’s theory for ideally coupled growth the current description is dealing with the coupled eutectic growth which is more realistic than an ideal course of eutectic structure formation. Thus, the undercooling of every eutectic phase is not equal to each other. A new boundary condition is introduced to solve the diffusion equation. According to this condition, the eutectic concentration is always maintained at the triple point of the solid / liquid (s/l) interface. Therefore, the solution to diffusion equation is given separately for both lamellae. The mass balance is satisfied by the current solution. Both thermodynamic equilibrium and mechanical equilibrium are assumed to be situated at the triple point of the s/l interface, only. A protrusion of the leading phase over the wetting phase is defined mathematically due to the mass balance fulfilment. The current description is associated with the asymmetrical phase diagrams. Finally, the current description is applied to interpretation of the rapid eutectic growth. Therefore, Aziz’s concept for the changes of partition ratio versus growth rate is introduced into the description. As a result, the rapid formation of the eutectic structure is described by the oscillatory mode. Interpretation of the oscillatory mode of the eutectic structure formation is illustrated in the arbitrary eutectic phase diagram. The eutectic structure, obtained through the detonation gas spraying onto the steel substrate (rapid solidification) is delivered to illustrate the present description.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 1; 65-72
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coupled and competitive eutectic growth
Autorzy:
Trepczyńska-Łent, M.
Powiązania:
https://bibliotekanauki.pl/articles/380538.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
eutectic solidification
competitive growth
coupled growth
krzepnięcie eutektyczne
wzrost konkurencyjny
wzrost sprzężony
Opis:
A description of the competitive growth is presented in the paper. The description is associated with the competition between eutectic structure and primary phase formation. A coupled zone for the eutectic solidification is drawn in the phase diagrams. The coupled zone is shown as a range of solute concentration versus under-cooling to justify the formation of the eutectic structure, exclusively. Interface growth temperatures of the single and coupled eutectic are illustrated schematically as a function of growth rates at a given composition Co.
Źródło:
Archives of Foundry Engineering; 2011, 11, 3 spec.; 237-240
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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