Comments on Intermetallic Thermochemistry
نویسندگان
چکیده
The need of a concerted multi-disciplinary approach in the investigation of intermetallic systems and the role of thermochemistry are underlined. The activity carried out in the Author’s laboratory in the alloy thermodynamics is summarized. The different instruments (calorimeters) built in laboratory are briefly presented and their performance discussed. The results obtained in the measurement of the enthalpy of formation mainly of several rare earth alloys are described. The characteristics of the Eu and Yb thermochemistry and crystallochemistry are finally underlined.
منابع مشابه
Surface Characterization and Tribological Behaviour of Ti-Ni-P Intermetallic Coatings on Titanium Alloys
In this research, tribological behavior of Ti-Ni-P intermetallic coatings on titanium substrates have been investigated under dry reciprocating conditions. Hardness profile testing results exhibit that high surface hardness has been attained and static indentation result shows that the intermetallic coating has better adhesion strength than the conventional ceramic coatings. In this respect, th...
متن کاملThermochemistry of Aluminum Species for Combustion Modeling from Ab Initio Molecular Orbital Calculations
High accuracy ab initio methods for computational thermochemistry have been applied to aluminum compounds expected to be present during combustion of aluminum particles. The computed enthalpies of formation at 298.15 K agree well with experimental values from the literature for AlCl, AlCl3, AlO, AlOAl, linear OAlO, planar Al2O2, AlOH, AlH, and AlN. The agreement is fair for AlCl2. Major revisio...
متن کاملThe Heat of Formation of Boron Trifluoride by Direct Combination of the Elements
An accurate value for the heat of formation of boron trifluoride is of significant importance because this value is involved in the thermochemistry of many boron compounds. The study of the thermochemistry of boron compounds was for a long time hampered by difficulties in measuring a suitable reaction involving elemental boron. The heat of formation of boric oxide, for instance, was uncertain t...
متن کاملDoubly hybrid density functional for accurate descriptions of nonbond interactions, thermochemistry, and thermochemical kinetics.
We develop and validate a density functional, XYG3, based on the adiabatic connection formalism and the Görling-Levy coupling-constant perturbation expansion to the second order (PT2). XYG3 is a doubly hybrid functional, containing 3 mixing parameters. It has a nonlocal orbital-dependent component in the exchange term (exact exchange) plus information about the unoccupied Kohn-Sham orbitals in ...
متن کامل