The highest entropy production during diffusion

• Autorzy: Serafin Daria , Wierzba Bartek
• Języki publikacji: EN

Abstrakty

EN

In the present paper, the theory of the highest entropy production is discussed. It allows to predict, which phases will grow during the multiphase ternary interdiffusion process. Moreover, the theory says, that phase with the highest entropy production value will nucleate as first in the reaction zone. To verify the theory the mathematical formula for calculating the entropy production was formulated. The formula bases on the generalized Darken method. Two diffusion couples: pure titanium with high purity copper-nickel alloys with different initial composition: Ni10Cu90-Ti and Ni90Cu10-Ti (at at.%) were annealed to obtain the thermodynamic and kinetic data. The integral diffusion coefficients for each component in each phase were determined using Wagners method. The reaction zones in ternary system have been analyzed: the microstructure was observed and chemical compositions were measured. Based on obtained results the entropy production was calculated. It can be expected, that the theory of the highest entropy production can be applied in determining a proper diffusion path in multicomponent, multiphase system.

Słowa kluczowe

EN

diffusion; Cu-Ni-Ti system; entropy production; diffusion path

• Wydawca: Wydawnictwa AGH
• Czasopismo: Computer Methods in Materials Science
• Rocznik: 2018
• Tom: Vol. 18, No. 1
• Strony: 11--17
• Opis fizyczny: Biblio gr. 18 poz., rys.

Twórcy

autor

Serafin Daria

• Rzeszow University of Technology, Faculty of Mechanical Engineering and Aeronautics al. Powstańców Warszawy 12, 35-959 Rzeszow, Poland

autor

Wierzba Bartek

• Rzeszow University of Technology, Faculty of Mechanical Engineering and Aeronautics al. Powstańców Warszawy 12, 35-959 Rzeszow, Poland

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).