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The iron–lutetium and iron–thulium binary systems needed to be reassessed after the previous thermodynamic evaluation by Konar (2012) [1] because significant discrepancies were observed with the experimental data. Furthermore new thermodynamic data were published in the meantime. In the present work, the modelings were carried out with the help of the CALPHAD (CALculation of PHAse Diagram) method...
The Ni–Sc system was thermodynamically assessed by the CALPHAD approach based on the available experimental data including the thermodynamic properties and phase equilibria. The excess term of the Gibbs energy of the solution phases (liquid, b.c.c., f.c.c. and h.c.p.) was assessed with the recent exponential temperature dependence of the interaction energies by Kaptay (Calphad 28–2 (2004) 115–124;...
Thermodynamic modelling of the Pb–Yb binary system was carried out with the help of the CALPHAD method. The liquid phase has been described with the association solution model with ‘ Pb 1 Y b 2 ’ as an associated complex. The solution phases BCC_A2 and FCC_A1 were modelled with the sublattice formalism. The αPbYb_LT and βPbYb_HT Pb sub-stoichiometric intermetallic compounds, which...
Thermodynamic modelling of the La–Sn binary system was carried out with the help of the CALPHAD (CALculation of PHAse Diagram) method. The liquid phase has been described with the association solution model with a ‘ La 1 Sn 1 ’ associated complex. The intermetallic compounds were treated as stoichiometric phases. The calculated phase diagram and the thermodynamic properties of the...
New experimental measurements of the mixing enthalpy of the liquid phase and the enthalpies of formation of the intermetallic compounds along with the data already taken into account in previous thermodynamic assessments have been used in a reassessment of the thermodynamic parameters of the Ca–Pb system. The calculations based on the thermodynamic modelling are in good agreement with the phase diagram...
The thermodynamic modelling of the Ba–Pb binary system was carried out with the help of CALPHAD (CALculation of PHAse Diagram) method. The liquid phase has been described with the association solution model with ‘ Ba 1 Pb 1 ’ associated complex. Ba 2 Pb,Ba 5 Pb 3 ,BaPb,αBa 3 Pb 5 _HT,βBa 3 Pb 5 _LT and BaPb 3 have been...
The Ag–Au–Bi system has been thermodynamically assessed through the Calphad approach by combining recently derived experimental data, in particular the phase diagram equilibria and the integral enthalpies of mixing of its liquid phase. A good agreement is obtained between the calculation and the experimental data. The resulting assessment will be incorporated into the thermodynamic description of...
The Au–Bi system has been thermodynamically reassessed through the Calphad approach by combining new experimental data, in particular the enthalpies of mixing of the liquid phase recently available in the literature. A good agreement is obtained between the calculated and experimental invariant equilibria. The resulting assessment has been incorporated into the ternary thermodynamic description of...
Phase separation in a pseudo-binary solid solution of the form (M 1 ,M 2 )C where M 1 and M 2 are chosen among minor addition in 9% Cr, martensitic-ferritic steels such as Nb, V, Ta and other transition elements such as Hf and Zr has been studied using the Calphad-Thermocalc approach. Ternary excess parameters accounting for phase equilibria in pseudo-binary sections...
The order/disorder transformation of the orthorhombic phase of the Al-Nb-Ti system has been modelled using the sublattice formalism with the aim of representing the thermodynamic properties of the two states, ordered and disordered, with a continuous function. The molar Gibbs energy of that phase was expressed as the sum of two terms, one order-dependent and the other order-independent. Constraints...
The Cu Fe Ni system was reassessed taking into account new experimental data in particular in the region of the ordered phase (Cu,Ni) 3 Fe. Its thermodynamic description was assessed using a four sub-lattice model, while a random substitutional solution model was used for the disordered solution phases.
The Gibbs energy of formation of the solution and compounds phases in the Fe-Nb system were derived from an optimization procedure using all the available experimental thermodynamic and phase diagram data. The thermodynamic description of the stoichiometric and non-stoichiometric compounds was made using two, three or four sublattice models, while a Redlich-Kister polynomial was used for the solution...
The AlN-Al 2 O 3 system has been reassessed due to new experimental data published in particular near the Al 2 O 3 rich part and relative to the φ' and δ phases. The Gibbs energy of formation of the solution and compound phases in the AlN-Al 2 O 3 binary section were derived from an optimisation procedure using all the available experimental thermodynamic...
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