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Thermal conductivity in a series of annealed Mg–Zn, Al–Zn and Mg–Al binary alloys was studied by experimental investigation and CALPHAD (CALculation of PHAse Diagram) methodology. Microstructure and phase identification of the alloys were determined using scanning electron microscopy and X-ray diffraction techniques. Thermal conductivity was measured over the temperature ranges from 298 K to 498 K...
The Mo–W–N and C–Mo–W ternary systems have been critically evaluated by means of the CALPHAD approach, wherein the C–Mo–W system was reassessed to ensure the model consistency. The Gibbs energies of individual phases in the ternary systems are described with corresponding models, such as substitutional solution model and sublattice model. A set of self-consistent thermodynamic parameters is obtained...
The Ta–Mo–C system was assessed by means of the CALPHAD approach. All of the phase diagram and thermodynamic information available from the literature were critically reviewed. The liquid was modeled as substitutional solution phase, while the carbides including fcc-(Mo,Ta)C1-x, bcc-(Mo,Ta), hcp-(Mo,Ta)2C and η-MoC were described by using corresponding sublattice models. The ζ-Ta4C3-x was considered...
The isothermal section of the Mo–Ni–Zr system at 1100°C was investigated by characterization of eight equilibrium alloys. X-ray diffraction (XRD) and electron probe microanalysis (EPMA) were used to identify the stable phases and obtain their compositions. The Mo–Ni–Zr system was then optimized by means of CALPHAD (CALculation of PHAse Diagrams) technique with the consideration of experimental data...
Phase equilibria in the Ag–Ga–Sn ternary system have been studied experimentally by using differential thermal analysis (DTA), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). Three vertical sections (Ag–Ga50Sn50, Ga–Ag50Sn50 and Sn–Ag50Ga50) and one isothermal section at 100°C were experimentally established. Based on available information...
In the present work, the thermal conductivities and microstructure of Al–xwt% Cu (x=1, 3, 5, 15 and 30) and Al–ywt% Si (y=2, 12.5 and 20) alloys were investigated by using laser-flash method, scanning electron microscopy (SEM) and X-ray diffraction (XRD). Besides, a CALPHAD (CALculation of PHAse Diagram) approach to evaluate the thermal conductivity of Al–Cu–Mg–Si system was performed. The numerical...
Thermodynamic modeling of the Ga–X (X=B, Ca, Sr, Ba) systems was performed based on the available experimental information and first-principles calculations. Enthalpies of formation for the compounds (Ca28Ga11, Ca5Ga3, Ca11Ga7, CaGa, Ca3Ga5, CaGa2, Ca3Ga8, CaGa4, Ga4Sr, Ga2Sr, Ga7Sr8, Ba8Ga7, BaGa2 and BaGa4) at 0K were computed by ab initio methods, and were used to improve the accuracy of the present...
The Cd–X (X= Sr, Ti, B, V) systems have been critically reviewed and modeled by means of the CALPHAD approach. The eight compounds, SrCd11, SrCd6, Sr13Cd58, SrCd2, SrCd, Sr5Cd3, TiCd and Ti2Cd, were treated as stoichiometric phases. By means of first-principles calculations, the enthalpies of formation at 0K for the SrCd11, SrCd2, SrCd and Sr5Cd3 have been computed to be −13892.5, −33985.2, −32280...
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