Crystallographic parameters in geometrically and topologically close-packed superstructures

The structures of stoichiometric compositions AB, A2B, and A3B for structures, B19, L10 ,L12 , D019 , D022 , D023 , D024 , A15, C14, C15 and C36 have been investigated based on the analysis of diagrams in coordinates of space-filling coefficients [psi] on superstructural compression [delta][omega]/[omega]. On the basis of the analysis of the abovementioned diagrams, the equation [psi]=f0+f1([delta][omega]/[omega]) has been obtained, and coefficients f0 and f1 of the equation for the investigated structures have been determined. It has been established that values of coefficients f0 and f1 for Laves phases have higher values than for all other compounds

Control of the Physical and Technical Properties of Water in Technological Processes

The physical and technical properties of water activated by the electrochemical treatment in a two-chamber electrolizer are investigated. The regularities of changes inthe values of acidity, redox potential, ionic composition, concentration of oxygen, structural organization of catholyte and anolyte are revealed. The possibility of controlling the properties of the liquid for more efficient extraction of polymetallic minerals by flotation is described

Binary phase diagrams based on elements VIIIA and IB periods of the D. I. Mendeleev's table and features of crystallographic parameters

The data obtained as a result of the analysis of crystallogeometric parameters and the structure of state diagrams of binary systems from elements VIIIA and IB periods of the D. I. Mendeleev's table are presented. It is shown that the classification of the evolution of phase diagrams of binary systems by types, proposed by T. A. Lebedev, correlates with features of concentration dependences of the deviation of atomic volumes in solid solutions from Zen law

Zen law and features of liquidus-solidus curves in binary state diagrams based on elements VIIIA and IB of the periodic table

The paper presents the analysis of binary state diagrams based on elements VIIIA and IB of the periodic table and crystal geometry parameters of solid solutions and intermetallic compositions. The analysis shows an explicit correlation between the type of the evolution of phase diagrams classified by Lebedev depending on the nature of atomic volume deviations observed in solid solutions and intermetallic compounds from Zen law

Steel surface TiCrN, TiMoNcoatings structural phase state change features after low-energy alpha particles irradiation

The low-energy alpha particles irradiation impact on structural phase composition and 321S31 steel surface TiCrN and TiMoN coatings morphology have been summarized. The samples irradiation has been carried out in the DTs-60 (the Dubna cyclotron) heavy-ion accelerator by the{4}He{+2} low-energy ions (40 keV) into a 1.0•10{17} ion/cm{2} fluence. It has been established thatthe 321S31 steel alpha particles implantation having energy of 40 keV results in the austenite initial γ-structurepartial transfer, stimulated by the irradiation, to the martensiteα-structure. The low-energy alpha particles irradiation within the fluencies range from 10{16} to 10{17} ion/cm{2} for the TiCrN and TiMoN coatings formed by the ionic bombardment condensation method doesn't result in the phase transfers with a coating crystal lattice type change