Long-Term Prediction of Corrosion Losses of Metals by Means of Various Functions for the Continental Part of Russia

Protection of Metals and Physical Chemistry of Surfaces - A comparative estimation of long-term prediction of corrosion losses of carbon steel and zinc has been performed. Predictions have been...     

Effects of Mechanical Load and Ionizing Radiation on Glass

This paper develops an approach to investigation of a solid as an integral system whose fundamental properties are determined by the energetics of its structure. Addressing the subject from a unified viewpoint, we consider the formation, accumulation, and transformations of defects in silicate and aluminophosphate glasses, which emit electromagnetic waves in a wide frequency range as a result of cracking. It has been shown that electron irradiation causes spontaneous electrical discharges, whose magnitude depends on the electron energy and irradiation time. The discharges occur at surface defects. Brush discharges develop in a layer where charged particles are distributed. In a thin layer of a charged dielectric, we observe a breakdown effect. The electrical discharge concentrates at surface defects, which can be produced in advance. A discharge can be initiated by approaching a grounded metallic tip to a charged surface even some time after irradiation. A discharge, mechanical loading, cooling, or heating of glass is accompanied by not only a light burst but also electromagnetic emission (EME), which correlates well with a polymorphic transformation process, thermoluminescence, etc. Thus, the release of accumulated energy from unirradiated and irradiated inorganic glasses on heating and cooling is accompanied by pulsed EME, whose intensity depends on the energy stored in the material.     

Epitaxial growth and properties of Mg<Subscript><Emphasis Type="Italic">x</Emphasis></Subscript>Zn<Subscript>1-<Emphasis Type="Italic">x</Emphasis></Subscript>O films produced by pulsed laser deposition

The Mg _x Zn_1-x O thin films with a Mg content corresponding to x = 0–0.45 are grown by pulsed laser deposition on ablation of ceramic targets. The conditions for epitaxial growth of the films on the single-crystal Al₂O₃ (00.1) substrates are established. The record limit of solubility of Mg in hexagonal ZnO, x = 35 is attained. In this case, the lattice mismatch for the parameter a of the ZnO and Mg_0.35Zn_0.65O films does not exceed 1%, whereas the band gaps of the films differ by 0.78 eV. The surface roughness of the films corresponds to 0.8–1.5 nm in the range of x = 0–0.27.     

Investigating a domain-key scheme of a relational database

A new approach to the synthesis of the domain-key normal form (DK/NF) for an arbitrary domain is used to analyze some criticized publications. A detailed comparison between various anomalies in database schemas, between different approaches to the design of schemas, and between the framework design method and classical and new design methods is made. The coincidence with the results of other studies is shown to be a subsequence of the strict soundness of the method proposed.     

Thermal hydraulics of moving dispersive layer of process units

The processes of moving dispersed charge materials and filtering gases are experimentally studied in the layer upon flow irregularity. The experimental results have been compared with the proposed theoretical models. Calculations have been carried out for electrothermal processing units of phosphorus.     

A Spectroscopic refractometer for a 375–1150 nm wavelength range

A spectroscopic refractometer is intended for measuring the index of refraction n _λ of liquid and solid media at any wavelength λ in a 375–1150 nm wavelength range with an accuracy of ±5 × 10⁻⁵. It can be used, in particular, for determining n _λ of monomers, compositions, and polymers, which are used for creating integrated-optical waveguides operating in a telecommunication spectrum region near 850 nm.     

The possibility of using a laser stereolithography method in forensic medicine

The data of computer-aided tomography are proposed to be used in forensic medical diagnostic and identification studies. The technology of making hard copies of objects by laser stereolithography on the basis of tomography data is described.     

Radiation-Induced Phase Transformations in Zirconium Alloys under Long-Term Irradiation

Variation of the phase composition and structure of zirconium alloys É125 and É635 under the action of irradiation is studied by the methods of microscopic x-ray energy dispersion analysis, radiographic analysis, and analytical transmission electron microscopy. Special features of phase transformations in the alloys under the action of long-term neutron irradiation at 290 – 315°C are analyzed.