Three-sublattice model that takes into account the spin density anisotropy, short-range order, and dimensioned factor for the binary Fe-Cr(V, Mo) systems

Modeling of structural and thermodynamics properties of sigma-phase for the Fe-Cr system

“…14 was obtained as a result. On base of this ground the system of the equations was obtained for a search of initial parameters of model at 0K.…”

“…Especially there is an open question of establishment of influence of static mixtures on magnetic properties of the atoms located in five sublattices of sigma -phase, and on the average magnetic moment depending on structure. Though the first steps in this direction was make and partially theoretically solution were obtained in paper [14] for ferromagnetic BCC -phases as well of pure iron as of the Fe-Cr alloys.…”

“…The Gibbs free energy of mixing of s-phase of alloys with regard to s-phases of both components according to 3SLM is equal (the details of the mathematical calculations possible to see in paper [14]):…”

Changes of electron density and defects distribution in binary and ternary iron alloys studied by positron annihilation

“…Scintillators based on polystyrene and polymethyl metacrylate with different additions that shift the emanation spectrum towards waves with higher lengths are known to be the best of native scintillators [34]. PMT 30,36,87,143 are the most often used as time PMT. Pulses from detectors enter two identical channels, where the amplitude pulse selection for search of pulses according to energies 0.511 and 1.27 MeV and the time binding is made.…”

“…Capture constant is connected with defects parameters in the following way , where R 2,3 are the characteristic defect sizes, С is the defects concentration, D + is the positron diffusion coefficient. The type and concentration of defects can be estimated using data of ref [36]*, the positron diffusion coefficient is accepted to be 1 сm 2 /с in these calculations. The electron density in clusters can't differ more than for 2 times in comparison with electron density in vacancies, since the lifetime of positrons in vacancies is two times shorter than the lifetime of positrons in a cluster, capture of positrons taking place on the surface of the cluster.…”