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2015 | 127 | 6 | 1573-1576
Article title

Numerical Approach to Predicting Thermodynamic Properties of Ternary Al-Ni-Pt Alloys

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EN
Abstracts
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.
Keywords
EN
Contributors
  • Departament of Materials Science, Rzeszów University of Technology, Powstańców Warszawy 12, 35-959 Rzeszów, Poland
author
  • Departament of Materials Science, Rzeszów University of Technology, Powstańców Warszawy 12, 35-959 Rzeszów, Poland
author
  • Departament of Materials Science, Rzeszów University of Technology, Powstańców Warszawy 12, 35-959 Rzeszów, Poland
author
  • Departament of Materials Science, Rzeszów University of Technology, Powstańców Warszawy 12, 35-959 Rzeszów, Poland
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv127n601kz
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