Materials Literature
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Model specimens in the form of rings made of high-strength corrosion resistance steel (09Kh16N4B-Sh) are tested for corrosion under voltage in order to produce artificial defects in the form of corrosion pits and surface cracks. The specimens served to test the effectiveness of the magnetic particle, ferroprobe and ed…
Abstract Within the Hubbard model with allowance for Hund’s and spin–orbit interactions, the concepts of thermal spin fluctuations in a strongly correlated system of f electrons in PuCoGa5 are developed. The effect of fluctuations of the spin magnetic moments of different orbitals on the spin–orbit splitting of the f…
Abstract For electrical steels there is a need to describe the intensity of the present texture components in the finally processed material as well as after the various processing steps. Preferable texture components like the cube fibre texture will improve the magnetization behaviour. Furthermore, there is interplay…
Abstract—Reflection of electromagnetic waves from a plasmonic metasurface consisting of a periodic array of grooves in a metallic layer has been investigated. It is shown that, at certain parameters of the system, the amplitude and phase of the reflected s-polarized wave do not depend on the angle of incidence and the…
Abstract Complex results in experimental and numerical flow dynamics research and spectra signals of gas pressure pulsations in annular and linear dual slotted nozzles are presented. Experiments are performed in a pulsed aerodynamic facility using acetylene-air mixture combustion products as working gas. Viscous flow…
The article presents the features and results of research work on the basis of the materials and documents provided, analysis of customer’s design features, a collegial survey of car damage, analysis of international experience in relevant research, formalized the nature of operational damage to load-bearing systems o…
Abstract Extended Preisach model parameters can be strongly related to microstructural properties of material. It can also include real physical magnetization mechanisms such as domain wall motion and domain rotation. This paper shows that Preisach model is able to anticipate different phases in material structure. Ex…
Prismatic crystals of Ag3(4-Amba)2(NO3)2 (I) and Ag(4-AmbaH)NO3 (II) are isolated from the reaction mixture of aqueous solutions of 4-aminomethylbenzoic acid (4-AmbaH) and AgNO3 at Т ≈ 70°C. The crystal structure of compound I (СIF file CCDC no. 1851513) and the luminescence properties of compounds I and II are studie…
Abstract Two new alkaline earth metal coordination polymers, which are [Ba(H2IDC)-(H3HmIDC)(H2O)2]n (I) and [Sr(H2HmIDC)]n (II) [H3IDC = 1H-imidazole-4,5-dicarboxylic acid, H4HmIDC = 2-(hydroxymethyl)-1H-imidazole-4,5-dicarboxylic acid), respectively, have been successfully synthesized under solvothermal conditions by…
Abstract This paper presents Vector B-H tester. Vector magnetic characteristics can express the vector relationship between magnetic flux density vector and magnetic field strength vector. A precise measurement method of vector magnetic characteristics has been imposed. However, this method spends time and requires an…
The Ibaré Lineament is a shear zone that sections the Western portion of Sul-riograndense Shield, affecting the orthogneissic rocks of Santa Maria Chico Granulitic Complex, acting as a conduct for hydrothermal fluids. The studied hydrothermal mineralogy reflects a propylitic alteration paragenesis that is composed of…
Abstract A series of silver alkynyl cages were synthesized using ligand 3,5-di-tert-butyl-phenylethynide and were structurally characterized. Reaction with [Ag(ArC≡C)]n polymer and (nBu4N)X (X = F, Cl, Br) gave compounds incorporating different halogen anions (F−, Cl−, Br−) and a hollow compound, namely [Ag14(ArC≡C)12…
Abstract Methods and results of physical and mathematical simulation of fracture processes at various scale-structural levels and under various (including extreme) loading conditions are given. The kinetics of cracks and their trajectories in the surface layers of material under conditions of cyclic loading, friction…
Abstract Permanent magnets, especially Nd-Fe-B magnets are very important engineering elements that are widely used in many applications. Detailed design of electrical and electronic equipment using permanent magnets requires precise measurement of magnetic characteristics. We developed a measurement system which can…
Introduction. Were investigated samples of fiberglass with the aim of its effective use in construction in the long term. Fiberglass is considered one of the most versatile and durable materials among polymer composite materials, however, and it is subject to destruction. It is known that one of the main reasons for r…
In this paper, the task is to develop methods for increasing the safety of a car by scientifically justified choice of tire profile series when replacing them. It should be easily applied in practice when operating vehicles. The calculation scheme is presented in the article and the equations of dynamics of a single-b…
RESUMO A diversidade de macroal gas lóticas tem sido pouco estudada no Brasil. Levantamentos florísticos não têm sido publicados, gerando um déficit de informações sobre a ecologia e taxonomia desses grupos. Sendo assim, o presente trabalho teve como objetivo realizar o levantamento de espécies de macroalgas de riacho…
Abstract In the recent years, the reducing of audible noise of laminated machine cores has become great importance, due to high relevance given to environmental awareness. The strain caused by magnetostriction and magnetostatic forces is recognized as one of the main sources of noise. Especially for transformers, stra…
In this paper, an advanced thermo-mechanical treatment was conducted on AISI 316 austenitic stainless steel. At first, three samples were rolled at the ambient temperature, the temperature of -20 oC (dry ice and ethanol) and -196 oC (liquid nitrogen). Then, the samples were annealed at 800 oC in the time range of 1 to…
In recent years, great attention has been paid to the development of high manganese austenitic TWIP steels exhibiting high tensile strength and exceptional total elongation. Due to low stacking fault energy (SFE), cross slip becomes more difficult in these steels and mechanical twinning is then the favored deformation…