127 Result(s)
within
A. I. Tolmachev
English
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Article
Influence of Thermal Treatment of the Extruded Mg–2.9Y–1.3Nd Alloy on Its Structural Parameters and Heat Capacity
The paper focuses on the thermal treatment effect on structural properties and heat capacity of the extruded Mg–2.9Y–1.3Nd alloy. It is shown that the bimodal temperature dependence of the heat capacity for th...
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Article
Micro-Arc Sr-Calcium Phosphate Coatings on Magnesium Implants: Morphology, Structure and Corrosive Behavior
An analysis of the structure, properties and corrosion behavior of micro-arc coatings based on Sr-substituted hydroxyapatite deposited on MA-20 magnesium alloy substrates is performed. The coating morphology, ...
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Article
Effect of Severe Plastic Deformation by Extrusion on Microstructure and Physical and Mechanical Properties of Mg–Y–Nd and Mg–Ca Alloys
The effect of extrusion on the mechanical properties of biomedical alloys based on Mg–Y–Nd and Mg–Ca systems is studied. The alloys are deformed by hot backward extrusion, accumulated deformation is e = 1.46. It ...
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Article
Dependence of the Parameters of Cascade Particle Multiplication on the Type of Atomic Potential
The cascade multiplication of atoms in a solid target is considered theoretically for different types of scattering cross section. The solution of the transport equation in some cases is found in an analytical...
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Article
Effect of Prolonged Thermal Exposure on Microstructure and Mechanical Properties of Zr – 1 wt.% Nb and Ti – 45 wt.% Nb Ultrafine-Grained Bioinert Alloys
The results on thermal stability of the microstructure and mechanical properties of Zr – 1 wt.% Nb and Ti – 45 wt.% Nb ultrafine-grained alloys subjected to long-term thermal annealing at a temperature of 400°...
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Article
Sputtered Atom Energy Distribution versus the Interatomic Interaction Law
The energy distribution of atoms sputtered by ion bombardment of a solid has been calculated. The theoretical consideration relies on solving a set of two transport equations by the discrete streams method. It...
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Article
Dependence of the Energy distribution of Reflected Ions on the Type of the Atomic Potential
The low-energy spectrum of ions reflected from the surface of a solid is calculated theoretically and by means of the computer simulation method. The theory is based on numerical solution of the transport equa...
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Article
Calculation of Ion Reflection from Solids: Computer Simulation and Theory
A computer program is developed to study ion reflection from solid surfaces. The program uses the cutoff Coulomb potential, the binary collision approximation, and the model of local inelastic energy losses. F...
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Article
The Influence of Dimesions and Phase State of Structural Elements on Mechanical Properties of Binary Alloys of the Ti–Nb and Zr–Nb Systems
The results of investigation of the influence of the structural element size and phase state of the Ti – 45 wt.% Nb and Zr – 1 wt.% Nb binary alloys on their mechanical properties are presented. The structural...
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Article
Calculation of Self-Sputtering Yield under Ion Bombardment of Solids: Computer Simulation and Theory
We developed a computer simulation program for investigation of solid self-sputtering under ion bombardment. The program is based on binary collision approximation, truncated Coulomb potential, and the model o...
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Article
Numerical Calculation of Light-Ion Backscattering in the Case of Normal Incidence on a Target Surface
The distributions of backscattered ions over paths in the target are calculated numerically for different ion energies and different ratios of masses and target atoms. The calculations are performed by solving...
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Article
Path-length distribution of ions reflected from a solid: Theory and computer simulation
Theoretical methods and Monte Carlo procedure are used to study path-length distributions of ions reflected from a solid. The theoretical analysis is based on the solution of the integral Chandrasekhar equatio...
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Article
Calculation of the angular distribution of reflected ions for the case of oblique incidence on the target surface
The angular distributions of reflected medium-energy ions are numerically calculated for the case of oblique incidence on the target surface. Calculations are performed by solving the one-velocity transport eq...
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Article
Structure and Mechanical Properties of Nitrogen Austenitic Steel after Ultrasonic Forging
Electron microscopy and X-ray diffraction have been used to investigate a nitrogen 07Kh17AG18 steel with an austenitic structure after the surface deformation treatment—ultrasonic forging. During ultrasonic fo...
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Article
Production of ultrafine-grain bioinert alloys
The microstructure and mechanical properties of bioinert titanium, zirconium, and niobium alloys in the ultrafine-grain state are investigated. The ultrafine-grain structure is obtained by severe plastic defor...
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Article
Positron spectroscopy of defects in submicrocrystalline nickel after low-temperature annealing
Using the method of measuring the positron lifetime spectra and Doppler broadening annihilation line spectroscopy, the annealing of defects in submicrocrystalline nickel produced by equal channel angular press...
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Article
Microstructure and Mechanical Properties of Nanostructured and Ultrafine-Grained Titanium and the Zirconium Formed by the Method of Severe Plastic Deformation
Results of investigation of the microstructure, mechanical properties, and thermostability of bioinert titanium VT1-0 and zirconium E110 in nanostructured and ultrafine-grained states formed by combined method...
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Article
Synthesis, molecular, and crystal structure of 3,4-bis[(2,6-di-tert-butyl-4H-pyran-4-ylidene)methyl]cyclobut-3-ene-1,2-dione and -1,2-dithione
Two new dyes have been prepared, 3,4-bis[(2,6-di-tert-butyl-4H-pyran-4-ylidene)methyl]-cyclobut-3-ene-1,2-dione and -1,2-dithione. Their molecular and crystal structures have been studied by X-ray diffraction, an...
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Article
Effect of meso-alkyl substituents in the polymethine chain of thiacarbocyanines on the morphology of dye aggregates
Using the example of meso-alkylsubstituted thiacarbocyanine dyes, it has been demonstrated that an ethyl substituent, as a rule, promotes the formation of long-wave J-aggreagtes in aqueous solutions and a methyl ...
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Article
Angular distribution of reflected ions at oblique incidence on a target
The angular distribution of ions reflected from a solid surface has been obtained as a result of solving the Boltzmann equation, written in the diffusion approximation by the method of moments. The angular dis...
