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

• Authors: M. Zagula-Yavorska , J. Romanowska , S. Kotowski , J. Sieniawski
• Languages of publication: 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

02.60.Cb; 05.70.Ce

Discipline

• 05.70.Ce: Thermodynamic functions and equations of state(see also 51.30.+i Thermodynamic properties, equations of state in physics of gases; for equations of state of specific substances, see 64.30.-t; for equations of state of nuclear matter, and of neutron-star matter, see 21.65.Mn and 26.60.Kp, respectively; see also 95.30.Tg in astronomy; for thermodynamic properties of superconductors, see 74.25.Bt)
• 02.60.Cb: Numerical simulation; solution of equations

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 6
• Pages: 1573-1576

Dates

published

2015-06

received

2014-08-18

(unknown)

2015-03-09

(unknown)

2015-04-28

Contributors

author

M. Zagula-Yavorska

• Departament of Materials Science, Rzeszów University of Technology, Powstańców Warszawy 12, 35-959 Rzeszów, Poland

author

J. Romanowska

• Departament of Materials Science, Rzeszów University of Technology, Powstańców Warszawy 12, 35-959 Rzeszów, Poland

author

S. Kotowski

• Departament of Materials Science, Rzeszów University of Technology, Powstańców Warszawy 12, 35-959 Rzeszów, Poland

author

J. Sieniawski

• Departament of Materials Science, Rzeszów University of Technology, Powstańców Warszawy 12, 35-959 Rzeszów, Poland

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Identifiers

DOI

10.12693/APhysPolA.127.1573