3, Аl2О3 one as basic clusters. The nanotechnology for the manufacturing of such ceramics has been developed on the base of conducted theoretical and experimental research on nitride ceramics nanostructure formation.
Selkin V. P., Stankevich V. M., Pleskachevsky Yu. M.
The investigation of stress state of shrinkable parts of radiation-modified polyethylene. pp. 12--14
Summary: The results of internal stress investigation originating in shrinkable radiation-modified polyethylene parts in the course of their mounting at installations arc presented. It was shown that the value of internal stresses of shrinkable parts is considerably affected by the temperature of their operation, the dependence of three dimensional structure of cross-linked polymer density becomes apparent only above the melting point of crystalline polymer phase.
Yacenko V. V., Stroke V. A., Krechko N. A.
Composition materials on the base of the polyamide and carbon fiber. pp. 15--18
Summary: A new composition material is investigated, which is made on the base of the polyamide 6, which contain as the filler the carbon armoring fiber and dispersion filler. The temperature conditions of the investigations and process are found experimentally. The process properties of this material to account for reological behavior are evaluated. For widening temperature region and increasing the service life the material composition was modified with fluorine containing modifier and the new material was made. There are attributed the basics physical-mechanical indicators. On the base of production experimental data the comparing analysis of the efficiency of the applied modifications is made.
Sheleg V. K., Pyatov V. V., Kovchur A. S.
The rheology of plasticized powders. pp. 19--23
Summary: Properties of powders, plasticized by the most widespread organic softener - paraffin are investigated. It is made a special viscosimeter and a series of experiments on studying rheology of such mixes is lead. Dependence of pressure of the expiration of a powder through a capillary on the content of softener, degree of radial reduction of the material and its temperature is found. Measurement results can be used at carrying out of design calculations on designing the new forming equipment and tools.
Martynenko S. M., Korotkevich S. V., Solovey N. F., Pinchuk V. G.
The estimation of tribotechnical effectiveness of plastic lubrication materials using electro-physical probe methods. pp. 24--27
Summary: It is considered the use of contact electrical conductivity to testing of frictional properties of plastic lubrication materials. The correlation between parameters of electrical conductivity and frictional coefficient is obtained. The dominant role of boundary lubrication layers in mechanism of a lubricity of a tribosystem is shown.
Byeli A. V., Bylenko E. G., Kukareko V. A.
The influence of low-energy ion-beam nitrogen on fatigue strength of 12X18H10T steel. pp. 28--31
Summary: The influence of high-current density low-energy nitrogen ion implantation in stainless steels at 650 and 770 К was investigated. It has been demonstrated that ion beam treatment doubled fatigue strength at s-1 = 430 МРа. X-ray diffraction was used to determine implantation induced stresses.
Shakhray O. N., Shepelevich V. G.
The texture of rapidly solidified foils of lead and its alloys. pp. 32--34
Summary: The formations of texture in rapidly solidified Pb foils have been investigated. Depending on the production conditions foils can have texture (111) or double texture (100)+(111). Recrystallization causes weakening of texture (111).
Komarov A. F.
The spatial distributions of atoms in the coatings deposited onto copper using a single beam assisted deposition technique. pp. 35--39
Summary: An original approach and a one beam experimental setup for in situ ion implantation combined with the deposition of various materials on metals are suggested. A simulation system developed makes it possible to characterize ion-assisted deposition, as well as to analyze the radial and depth distribution of atoms deposited and implanted. Results of simulation allow us to conclude that the ion beam energy, the mass and fluence of the ions, and especially the target geometry have a noticeable effect on the processes. Experimental data for the depth profiles of atoms implanted and for the thickness of films applied are also reported. The variation of the film thickness, the uniformity of the films, and the efficiency of mixing in the film-substrate system are discussed based on the results of simulation and experimental data.
Volochko А. Т., Batsevichus O. G.-A., Belov I. A.
The investigation of physico-chemical processes occurring during heating of heat resistant materials with a phosphate binder. pp. 40--43
Summary: The processes occurring during heating of heat resistant materials with a phosphate binder have been studied. The temperature-time parameters required for heat treatment of materials with additions of reprocessed aluminum alloy slag have been determined. The investigation of the major properties of heat resistant materials designed for lining of induction furnaces used for melting and reprocessing of aluminum and its alloys has been made.
Volochko А. Т., Bogdanova N. P.
The investigation of the properties of a gas generator based on reprocessed aluminum alloys used for production of porous concrete. pp. 44--48
Summary: The investigation has been made of the possibility to produce an effective gas generator from reprocessed aluminum alloys obtained using the methods such as centrifugal alloy atomization and grinding of aluminum chip in ball and disk mills with subsequent additional grinding in the presence of a liquid phase. The dependence of a gas generating ability on aluminum alloy composition and methods used for gas generator production as well as structure and properties of the materials thus obtained have been studied.
Dyatlova E. M., Kakoshko E. S., Biriuk V. A., Markevich R. M.
On the improvement of raw clays quality. pp. 49--53
Summary: They have examined influence of silica bacterium Bacillus mucilaginosus on clays technological properties of the Republic Belarus of different mineral composition. It is established, that biological processing of clays increases their plastic properties, durability of dry and fired samples and increases containing of fine-grained particles. As a result one can limit cycle of product drying, decrease percentage of drying defect, activate castling process, decrease temperature of product firing and increase products durability.
МЕХАНИКА И НАДЕЖНОСТЬ МАШИН
Yarovaya A. V.
The radiation knock on a circular sandwich plate. pp. 54--59
Summary: The fluctuations of springy circular sandwich plate, caused by the neutron flow, are explored. The production initial-boundary problem is stated, the equation for the calculation own numbers is obtained, the system of own fundamental functions is built. The ratio of dynamic part of sagging of the plate to its static part is numerically explored.
Stelikov N. E.
The kinetics of deformation and destruction of solid bodies at creep. pp. 60--63
Summary: The bases of the theory of deformation and destruction of the solid bodies loaded in a mode of creep are stated.
МАШИНОСТРОЕНИЕ
Zhuravsky N. A., Polessky D. E., Prokhorov I. V.
On some factors specifying the surface quality under magnetorheological polishing. pp. 64--68
Summary: Among the various approaches of non-contact polishing the magnetorheological polishing has found a wide application due to its controllability. The process is based on the peculiarities of the magnetorheological suspension flow in the gap between the surface to be polished and the nonmagnetic carrier surface under the action of magnetic field. The results of polishing experiments show that glass surface roughness (rms) of 0.001 µm and the removal rate up to several microns per minute can be easily obtained even for hard glasses by this method by changing the magnetic field strength.
РАДИОЭЛЕКТРОНИКА И ПРИБОРОСТРОЕНИЕ
Kuraev A. A., Navrotsky A. A., Sinitsyn A. K.
The irregular helical slow-wave structures for application in satellite TWT. pp. 69--75
Summary: The exitation equations for the irregular helical waveguide are obtained on the basis of conversion of coordinates and using Galerkins projection technique.
Baev A. R., Asadtchaya M. V., Filippov K. A.
The influence of boundary conditions on the subsurface longitudinal and transversal waves propagation in solid bodies. pp. 76--82
Summary: A further development of the physical principles of propagation of ultrasonic head and vertically polarized transverse waves in solids with different boundary conditions has been made. Effect of increase of pulse amplitude of subsurface waves in solids, which waveguide surface was made with rectangular projection, and solids with fluid layer on its waveguide surface was found. Regularities of variation of the acoustical field of transducers and its influence on the sensitivity of measurement system were discovered.
Chernyshev A. V., Zagorsky I. E.
The influence of demagnetizing field of sample on the Rayleigh minor loop. pp. 83--85
Summary: The influence of the demagnetizing field of ferromagnetic sample on the form of minor loop is considered. It is assumed, that at absence of the demagnetizing field the magnetic reversal of a material is carried out on Rayleigh's minor loop. The estimation of difference of the obtained minor loops form from parabolic one is carried out at various values of demagnetizing factor.
ИНФОРМАЦИОННЫЕ ТЕХНОЛОГИИ И СИСТЕМЫ
Petko V. I., Kukonin V. E., Konchak V. S., Vystavnaya E. I.
The research of algorithm of definition of Wiener cores for non-linear dynamic systems by the cross-correlation method. pp. 86--91
Summary: The discrete analog of known algorithm of calculation of Wiener kernels using the cross correlation method and program realising the method are made.
The experiments using computer model of nonlinear dynamic object which have allowed to reveal the basic reason of inaccuracies for definition of Wiener kernels using the cross correlation method are carried out.
The recommendations for definition of kernel size and its sampling interval are given.
ЭНЕРГЕТИКА, ТЕПЛО- И МАССООБМЕН
Klubovich V. V., Kozhukhovsky V. I, Pivovarchik A. A.
The light flux distribution in a receiver at ideal concentrator. pp. 92--98
Summary: The task of determining the radiant flux distribution on the receiver surface after reflection of parallel beam from an axisymmetric ideal concentrator is solved within geometrical optics approach.
Timoshpolsky V. I., Trusova I. A., Andrianov D. N., Kozlov S. M., Ratnikov P. E.
The mathematical simulation of heating modes of tube billets in circular furnaces. pp. 99--103
Summary: A mathematical model of billet heating in circular furmaces considering variability of thermal physics of products heated, asymmetry of heating, constructive and operational parameters of a fumace is given by the authors. Results of the comparison of a computation solution of the mathematical model with the results of a full-scale experiment are shown in this work. Heating of pipe billet of various steel grades and different geometrical dimensions in circular furnace units is investigated.
Yanitsky V. A.
The choose of optimal digital signal filter at the control of technological installations functioning. pp. 104--109
Summary: The method of choice of optimal digital filter characteristics, used for distinguishing of useful signal from the sum of useful signal and occasional obstacle. The method included elements of the recognition samples theory. Utilization of the method permitted to reduce cost of preliminary experimental works and raise efficiency of carrying out the functions of technological object control.
ДИАГНОСТИКА И БЕЗОПАСНОСТЬ ТЕХНИЧЕСКИХ СИСТЕМ
Korneev S. V., Martsynkevich B. A., Paribok V. I., Khilmanovich A. M., Chigrinov S. E.
The direct measurement of 238U, 232Th and 226Ra content in geological probes by g-spectroscopy method. pp. 110--116
Summary: The direct method of concentration measurement of 238U, 232Th and 226Ra in geological objects is presented in the paper. The method is based on the measurements of radioactivity 234Pa, 228Ac and 224Ra using of high efficiency HPGe detector.
Zankovets P. V., Zdor G. N., Sheleg V. K.
The investigation and calculation of regulating boundaries for welded joints quality level. pp. 117--124
Summary: Investigations and analysis of welded joints quality inspection by nondestructive testing have been carried out. It is shown that passive testing is only the detector of reject and therefore such type of inspection can not ensure quality of welding and assembling works. To prevent reject operatively and correct the technology one should know the allowed (normative) defects level area. Boundaries of quality level regulation in welding production for basic general populations on quality indexes are calculated. This allows, when defects level grows up to boundary values, to take measures on its elimination and to make a regulating impact on quality.
УЧЕНЫЕ БЕЛАРУСИ
Владимир Исаакович Тимошпольский (К 50-летию со дня рождения). C. 125--127
Нажмите здесь для чтения статьи
/ Издания академии / Научные журналы / К началу страницы
Разработана и поддерживается Николаем Н. Костюковичем. Последнее обновление: 2 декабря 2006 г.
Создана при участии Игнатия И. Корсака
Копирайт © 2004-2006 Национальная академии наук Беларуси
Копирайт © 2004 Издательство "Беларуская навука"
