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Experimental Study on Thermodynamics of The Bi-Cu-Sn System Badania Doświadczalne Stopów Bi-Cu-Sn

100%
Romanowska J.
Archives of Metallurgy and Materials
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2011
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issue 1
2
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Numerical Approach to Predicting Thermodynamic Properties of Ternary Al-Ni-Pt Alloys

51%
Zagula-Yavorska M., Romanowska J., Kotowski S., Sieniawski J.
Acta Physica Polonica A
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2015
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vol. 127
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issue 6
1573-1576
EN
Thermodynamic properties of ternary Al-Ni-Pt system, such as ^{ex}G_{AlNiPt}, μ_{Al(AlNiPt)}, μ_{Ni(AlNiPt)}, and μ_{Pt(AlNiPt)} at 1373 K were predicted on the basis of thermodynamic properties of binary systems included in the investigated ternary system. The idea of predicting ^{ex}G_{AlNiPt} values was regarded as calculation of values of ^{ex}G function inside a certain area (a Gibbs triangle) unless all boundary conditions, that is values of ^{ex}G on all legs of the triangle are known (^{ex}G_{AlNi}, ^{ex}G_{AlPt}, ^{ex}G_{NiPt}). This approach is contrary to finding the function value outside a certain area, if the function value inside this area is known. ^{ex}G and L_{ijk} ternary interaction parameters in the Muggianu extension of the Redlich-Kister formalism are calculated numerically using the Mathematica program. The accepted values of the third component concentration x_{x} differed from 0.01 to 0.1 mol fraction. Values of L parameters in the Redlich-Kister formula vary for different x_{x} values, the ^{0}L_{AlNiPt} value in particular. Values of thermodynamic functions: ^{ex}G_{AlNiPt}, μ_{Al(AlNiPt)}, μ_{Ni(AlNiPt)} and μ_{Pt(AlNiPt)} do not differ significantly for different x_{x} values. The choice of x_{x} value does not influence the accuracy of calculations.
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The Ni-Al-Hf Multiphase Diffusion

45%
Sieniawski J., Romanowska J., Wierzba B., Markowski J., Zagula-Yavorska M.
Archives of Metallurgy and Materials
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2016
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issue 2
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