(Materials, Technologies, Tools)
Published by The Institute of Mechanics of Metal-Polymer Systems of the National Academy of Sciences of Belarus, Gomel, Republic of Belarus
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MATERIALY. TEKHNOLOGII. INSTRUMENTY (Materials, Technologies, Tools) Published by The Institute of Mechanics of Metal-Polymer Systems of the National Academy of Sciences of Belarus, Gomel, Republic of Belarus |
Summary: The paper presents the technique and algorithm of modeling by a method of final elements of a deflection of multiempty plates as three-dimensional objects. By a method of computer multiempty object-oriented modeling deflections of buildings ceilings with a wide step of cross-bearing walls and columns are investigated. The results of theoretical research correspond well with the experimental data received at BelNIIS. It is shown that deflections of equal ceilings with a hinge support on columns and cross walls have significant distinctions.
Izmailov V. V., Novoselova M. V.
Simulation of mechanical and electrical processes of disperses material compaction. Report 2. Theoretical model for the calculation of the electrical resistance of strained granule of disperse material. pp. 11--15
Summary: Formulae have been obtained for the electrical resistance of a granule of dispersed material depending on it deformation degree. The influence of surface film fracture on electrical contact resistance has been investigated on the model granules. The dependence of metallic contact part of total contact area on dimensionless nominal contact pressure has been obtained. It is shown experimentally that the area of a single metallic contact spot averages about 1% of total contact area irrespective of contact pressure. Experimental verification of theoretical and modeling results has been carried out.
Summary: The article introduce some investigations of surface of alloys AL formed in result of preliminary treatment. It is ascertained that adhesion proprieties of surface qualifies its energetistic state conditioned with quantity of active centres. Univocally it fixed, that presence of thin layer Al2O3 assures creation of the strong chemical bonds among glue and surface of metal.
Kapustina I. Â., Kazazyan V. I.
Water resistance of materials for lining of chimneys and gas-passages. pp. 19--22
Summary: The kinetics of corrosion processes of various kinds of concrete at action on them of water before and after realization of industrial tests in the environment of smoke gases is investigated. It is established, that the structure of concrete, type binder and the polymeric additive, a way of manufacturing act essential influence on corrosion resistance of a material.
Korosteleva E. N., Rusin N. M.
Sintering medium composition and temperature effect on mechanical properties of Cu--Al system. pp. 23--27
Summary: The effect of aluminum content and sintering temperature on mechanical properties of sintered Cu--Al alloys has been studied. It has been found out that major effect on strength characteristics of sintered alloys with a given porosity is exerted by aluminum dopes while temperature influences but insignificantly. The maximum strength increment is observed when aluminum concentration exceeds its solubility limit in a solid solution on copper base.
Tolstopyatov E. M.
Thickness non-uniformity of coatings formed at viscous flow of filmforming gas in long channels. pp. 28--33
Summary: The diffusion process of an active gaseous substance in long channels and a coating deposition onto its walls is theoretically considered. The conformity characteristics of the coatings obtained as depended on film-forming gaseous substance parameters and technological conditions are analysed. The practical recommendations for obtaining coatings of a given thickness uniformity are worked out.
Fedorov V. D.
Mechanical dynamic properties and compatibility of blend components based on segmented polyurethane and ABC plastics. pp. 34--41
Summary: Dissipation properties and mechanisms thereof, as well as segregation degree and thermodynamic interactions of components in blends based on thermoplastic polyurethanes and acrylonitil butadienestyrene plastics have been investigated by the method of torsion oscillations.
Shcherbakov S. V., Egorov A. I., Zheleznyakov A. A., Sarkisov O. A.
The polyimidefluoroplastic film activation in the barrier discharge. pp. 42--45
Summary: The mechanism of polyimide film activation is discussed. The experiments results are described. It is shown that at this activation method adhesive properties of the film are mainly improved due to defective surface layer removal and non-polar interaction increase.
Shilov V. V., Gomza Yu. P., Klepko V. V., Slisenko V. I., Ivanitskii P. G., Vasilkevich A. A., Shembel E. M.
Composite gel polyelectrolityc on basis of the polyvinilchloride with additives LiClO4 and propilencarbonate. pp. 46--50
Summary: X-ray scattering, calorimetric, and quasi-elastic neutron scattering(QENS) investigation of the polymer gel electrolytes based on 20% PVC and containing 80% of propylene carbonate (PC) -- LiClO4 solution as the liquid phase studied. It was established that after incorporating PC into the micropores of PVC GEls glass transition of its increased by 3 Ê. This is, evidently, ÿ reflection of an effect of confining liquid PC in the pores of PVC microphase-separated morphology. Addition of the salt to the PVC--PC system results in rising Tg of both the pure PC and PVC--PC gel by 10 Ê. The SAXS data of pure PVC and PVC-PC and PVC--PC--LiClO4 indicate that the gels based on PVC consist of microdomains of a different composition. Single-particle and collective dynamics of solvent molecules in free state and in the pores of polymer gels based on PVC were studied by quasi-elastic neutron scattering technique.
Summary: The outcomes of researches of features amorphoused composite doped of iron-base alloys are submitted at a fast hardening from a melt. Is rotined, that in process amorphoused the ordered massifs of atoms with high packing density -- supersaturated solid solutions of the different class will be derivated. Composite doping of alloys on the basis ferry lactase provides considerable hardening of a received product during a fast hardening of melts and high thermal stability of alloys during heating. The estimation amorphous of capacity composite doped of iron alloys is executed.
Vershina A. K.
Influence of pressuare of reactive gas mixture on decorative properties of ion-plasma Ti(N,C)-coatings. pp. 57--59
Summary: Decorative properties of Ti(N,C)-coatings deposited on metal substrates by vacuum arc method with Using toroidal separating system have been investigated. Principles of changes of coating colour parameters depending on pressure of reactive gas mixture in vacuum technological volume and on its composition were obtained.
Dovnar D. N.
Effect of impregnation method of modifiers upon strength characteristics of epoxy coatings. pp. 60--62
Summary: The effect of impregnation method of modifiers upon strength characteristics of rust-proof coatings lor protection of pipelines against corrosion has been studied. It's shown that preliminary variation of surface properties of the filler and volumetric characteristics of the binder improves strength of the coatings by way of enhancing adhesion at the polymer-filler interface.
Kovalevskii A. A., Glukhmanchuk V. V.
Research of process refusement silicon-germanium of crosspieces in the semiconductor fise-link memory array. pp. 63--66
Summary: The results of research refusement silicon-germanium of crosspieces received on a basis pyrolitic of decomposition of a mix monosilane-monogermane-arsine-hydrigine are given. The changes of distribution of intensity refusement, density and pulse of currents from thiskness, superficial resistance and size of a grain of formed crosspieces are determined. Is shown, that the basic influences on density of currents refusement render thickness and size of grains films of a polycrystalline alloy on the basis îf silicon and germanium.
Kudryavtsev I. A., Bogdanov V. P., Vasilyev A. A.
Investigation of concrete carbonate formation on the stage of it production in the contact with atmospheric carbon dioxide. pp. 67--71
Summary: It was studied kinetics of calcium hydroxide solutions carbonization process, which imitated concrete mixtures on the stage of their production. Results obtained gave opportunity to determine kinetic peculiarities and carbonate formation mechanism on phase solution-aid boundary in static and conditions of solution mixing from phase boundary square, electrolyte thickness, calcium hydroxide primary concentration. It is given quantitative estimation of carbonate formation for a number of ferry concrete constructions after their production.
Myshkovets V. N., Maximenko A. V., Shalupaev S. V.
The technology of restoration details with superficial defects from the steel 30ÕÃÑÍ2À. pp. 72--74
Summary: The technology of restoration details with superficial defects from the steel ÇÎÕÃÑÍ2À was developed by the methods of laser weld, including in a choice of temporary and energetic parameters of laser radiation, and welding material and protecting gas in a zone of treatment. The suggesting method of restoration allow to prolong the period of exploitation of the details in separate pack and mechanisms, which used in machine building, stand building and another branches of industry.
Sokolkin Yu. V., Kotov A. G., Chekalkin A. A.
Dynamic resonant regimes of hydrojet surface treatment processes. pp. 75--79
Summary: The mathematical modeling problem is considered aimed at numerical analysis of dynamic parameters of design elements treated by a high-speed water jet. In the basis of describing the dynamic behavior of the design lie the statement îf the 3D boundary problem of the theory of elasticity combined with numerical calculations by the finite element method. Objects of the investigation are polymethyl methacrylate (PMMA) samples as well as steel and titanium design sample. Aim of the investigation is estimation of the effect of physico-mechanical characteristics of the material, type of sample fixation and dynamic properties of the jet on parameters of the samples and their surface erosion. A series of the modal, harmonic and spectral analysis problems have been solved with this aim.
Summary: Choice of rational parameters of shaking explosions has been made to find the method ensuring reduced intensity of salt and gas emissions in the near-pit face area.
Gubanov V. A., Prushak V. Ya., Scherba V. Ya., Polyakov A. L.
Investigation of rock pressure phenomena at a layered excavation of the third potassium seam. pp. 84--92
Summary: Based on investigations conducted and pilot testing of the technique of weakening roof rocks the mechanism of rock failure has been determined which is used today at Starobinsky mines of potassium salts.
Klimovich L.N.
Evaluation of dynamic characteristics of contact's torque meters with a frequency outlet. pp. 93--96
Summary: The paper cites the analysis of evaluation methods of dynamic characteristics of the first measuring transducers (meters) with a frequency outlet signal. A new method of estimating dynamic characteristics is described and a principal electrical scheme is shown for a developed testing bench for determining transient characteristics. Test results are presented and estimates of the main dynamic parameters are given.
Komarov A. I.
Peculiarities of coating formation on aluminum alloys with the microare oxidation method. pp. 97--101
Summary: The singularities of oxide ceramics coating shaping by a method of microarc oxidizing (MAO) on an aluminium alloy AK5M2, having heterogeneous structure in an initial cast state are explored. It is shown, that on alloys of such type in process MAO the developed interface between a coating and a basis will be derivated at the expense of nonuniform transformation different structural component of an alloy. The formed coating represents the high-strength composite with intercalation of variously hardened areas with maximum ratings of a microhardness from 14 up to 18 GPa.
Rodnenkov V. G., Ermakov S. F., Borodin A. V.
The laboratory device for definition of antiturbulent efficiency of special additives. pp. 102--105
Summary: The review of existing methods of laboratory definition of antiturbulent efficiency of special additives to a turbulent stream is given. Their characteristic lacks are shown. The design and a principle of work of the laboratory device developed by authors for definition of antiturbulent efficiency of the specified additives is described.
JUBILEE. p. 106
CONFERENCE CALENDAR. pp. 107--108
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