Bulletin of the Karaganda University "Physics Series"最新文献_第2页

Study of the copper structure samples externed to extreme influences 研究受极端影响的铜结构样品

Bulletin of the Karaganda University "Physics Series" Pub Date : 2024-03-17 DOI: 10.31489/2024ph1/73-82

G. S. Bektasova, K. M. Issina, G. T. Imanzhanova, L.I. Kvenglis, N. Kantai, A. I. Nedobitkov, A. B. Sadibekov

{"title":"Study of the copper structure samples externed to extreme influences","authors":"G. S. Bektasova, K. M. Issina, G. T. Imanzhanova, L.I. Kvenglis, N. Kantai, A. I. Nedobitkov, A. B. Sadibekov","doi":"10.31489/2024ph1/73-82","DOIUrl":"https://doi.org/10.31489/2024ph1/73-82","url":null,"abstract":"This work is devoted to the study of changes in the crystal structure, chemical and phase composition of copper samples subjected to extreme effects of temperature, pressure and electromagnetic fields. With the help of X-ray diffraction, as well as microanalysis, it was revealed that the plastic deformation of copper wires in the car power supply system leads to the formation of a superconducting Cu2O phase. This is the reason for the rapid ignition of the car, as it leads to a sharp increase in the magnitude of the electric current and temperature in the plastic deformation zone of copper wires. During explosion welding of copper samples, the Cu2O phase appears on their surface, which has superconducting properties. This significantly changes the electrophysical properties of copper samples. In metallurgical processes during the smelting of copper products, there is a possibility of the appearance of a superconducting Cu2O phase. When modifying a copper melt with hardening additives, the superconducting Cu2O phase makes it possible to obtain fracture-resistant copper products with high electrical conductivity. Plastic deformation of a copper foil 30 mkm thick by a magnetic field generated by a current of 180 kA leads to the formation of a texture and rupture of the foil. This has been detected using X-ray diffraction, as well as optical and scanning electron microscopy.","PeriodicalId":505293,"journal":{"name":"Bulletin of the Karaganda University \"Physics Series\"","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140235570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of technology for creating high-voltage p0–n0 junctions based on GaAs 开发基于砷化镓的高压 p0-n0 结技术

Bulletin of the Karaganda University "Physics Series" Pub Date : 2023-12-15 DOI: 10.31489/2023ph4/50-56

A.M. Sultanov, A.A. Abdukarimov, M.Z. Kufian

引用次数: 0

Determination of the effects of the diameters of the throttle holes on the fluid flow of an inertial hydrodynamic installation 确定节流孔直径对惯性流体力学装置流体流动的影响

Bulletin of the Karaganda University "Physics Series" Pub Date : 2023-12-15 DOI: 10.31489/2023ph4/82-90

B. Nussupbekov, M. S. Ovcharov, E. Z. Oshanov, U. B. Yesbergenov, M. Duisenbayeva, A. A. Tishbekov, M. K. Amanzholova

{"title":"Determination of the effects of the diameters of the throttle holes on the fluid flow of an inertial hydrodynamic installation","authors":"B. Nussupbekov, M. S. Ovcharov, E. Z. Oshanov, U. B. Yesbergenov, M. Duisenbayeva, A. A. Tishbekov, M. K. Amanzholova","doi":"10.31489/2023ph4/82-90","DOIUrl":"https://doi.org/10.31489/2023ph4/82-90","url":null,"abstract":"In the article, in order to solve environmental problems associated with heating buildings and structures, the methods of converting electrical energy into thermal energy and the processes occurring at the same time are considered. Well-known thermal installations, such as vortex, cavitation, cavitation-vortex, rotary, do not fully meet the requirements of consumers. In these conditions, the search for effective solutions is an urgent task. Such solutions include a method of obtaining thermal energy by creating pressure at the throttle openings by inertia forces of a rotating mass of liquid. To determine the flow of liquid through the throttle holes, an experimental stand was made. With the help of the stand, we determined the flow rate of liquid through throttle holes with a diameter of 1.5, 2, 3 mm. During the experiment, it was found that the larger the diameter of the throttle opening, the higher the fluid flow. However, it is impossible to excessively increase the diameter of the throttle opening, as this will complicate the creation of pressure at the throttle openings. It is found that with an increase in the angular velocity of the rotor, the fluid pressure at the throttle openings increases, and the proportion of fluid flow from the preliminary static pressure in the total flow decreases. It is certain that the preliminary static pressure in the supply line has a significant effect on the flow rate only at low rotor speeds (ω up to = 76 rad / s), and with increasing angular velocity, its influence decreases and the coefficient k tends to 1.","PeriodicalId":505293,"journal":{"name":"Bulletin of the Karaganda University \"Physics Series\"","volume":"66 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139178447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanochemical synthesis of AlCoCrFeNi powders via high-energy ball milling 通过高能球磨机械化学合成 AlCoCrFeNi 粉末

Bulletin of the Karaganda University "Physics Series" Pub Date : 2023-12-15 DOI: 10.31489/2023ph4/76-81

Y. Kambarov, A. Kengesbekov, Zh.B. Sagdoldina, D. Buitkenov

引用次数: 0

Possibility of using inexpensive steel protected by deposited vacuum-arc coatings as a basis for parts and tools coating technology 利用沉积真空电弧涂层保护的廉价钢材作为零件和工具涂层技术基础的可能性

Bulletin of the Karaganda University "Physics Series" Pub Date : 2023-12-15 DOI: 10.31489/2023ph4/91-95

A. Berdibekov, V. Laurinas, A. Dolya, V.V. Gruzin, S. Guchenko, A. Baltabekov

{"title":"Possibility of using inexpensive steel protected by deposited vacuum-arc coatings as a basis for parts and tools coating technology","authors":"A. Berdibekov, V. Laurinas, A. Dolya, V.V. Gruzin, S. Guchenko, A. Baltabekov","doi":"10.31489/2023ph4/91-95","DOIUrl":"https://doi.org/10.31489/2023ph4/91-95","url":null,"abstract":"The aim of the work was to identify the possibility of using under extreme conditions parts made of inexpensive steel, protected by sequentially deposited films — Cr and then simultaneously TiN + CrN, micron thickness. Steel grade St3 (Fe ~ 97%) was chosen as the basis. In our country, as in many others, this steel is not only the most common structural material with easy processing and low cost, but also produced in large volumes. The deposition of two consecutive layers of films — Cr and TiN + CrN on steel substrates was carried out using vacuum-arc technology (Arc-PVD). The measurements were carried out after the process of periodic heating of the samples to a temperature of 650 0C, followed by rapid cooling, implemented by immersing the samples in water. The main parameters of the coating were measured — wear resistance, heat resistance, microhardness. Each thermal effect lasted 20 hours, and the entire heating-cooling process was carried out 5 times. The results obtained in this work can be considered very promising for the protection of inexpensive steels.","PeriodicalId":505293,"journal":{"name":"Bulletin of the Karaganda University \"Physics Series\"","volume":"393 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139177974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The glass transition temperature investigation of polymers by molecular dynamic simulations 通过分子动力学模拟研究聚合物的玻璃化转变温度

Bulletin of the Karaganda University "Physics Series" Pub Date : 2023-12-15 DOI: 10.31489/2023ph4/57-64

P. Saidakhmetov, I. Piyanzina, G. Baiman, O. Nedopekin, D. Tayurskii

{"title":"The glass transition temperature investigation of polymers by molecular dynamic simulations","authors":"P. Saidakhmetov, I. Piyanzina, G. Baiman, O. Nedopekin, D. Tayurskii","doi":"10.31489/2023ph4/57-64","DOIUrl":"https://doi.org/10.31489/2023ph4/57-64","url":null,"abstract":"In this paper, the process of glass transition is studied, the theory of which is not fully developed. Computer modeling can be used to understand the theory of this phenomenon. The glass transition temperature is influenced by a large number of polymer parameters: cooling rate, pressure, presence of diluent, structural features, etc. We are considering a number of different polymers to test the ability of the pcff+ force field to determine the glass transition temperature. The effect of tactility, composition, pressure and the presence of a diluent on the glass transition temperature of polymers will be shown using molecular dynamics (MD) and pcff+ force-field modeling. The effect of tact was studied using the use of atactic, isotactic and syndiotactic poly(methyl methacrylate) and atactic, isotactic and syndiotactic polypropylene. The LAMMPS code integrated into the MedeA computing environment was used to simulate the molecular dynamics of polymers. The calculation of the glass transition temperature at different cooling rates is closely related to the balanced initial systems. Due to the inability of current atomistic simulations to achieve the required cooling rates, as in experiments, the gap was not sharp and quite obvious. The data obtained show that the pcf+ force field describes tactics quite effectively and gives differences in the glass transition temperature for different types of tact. For polymers diluted with CO2, the glass transition temperature decreases almost linearly, which is in good agreement with the experiment. As expected, the pressure increases the glass transition temperature. However, at high pressure, the slope fracture disappears, and the determination of Tg becomes extremely difficult. The simulated annealing process will be applied to a set of polymers to obtain graphs of the specific volume versus temperature and determine the glass transition temperature.","PeriodicalId":505293,"journal":{"name":"Bulletin of the Karaganda University \"Physics Series\"","volume":"311 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139177339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic response of unsupported and supported cavities in an elastic half-space under moving normal and torsional loads 弹性半空间中无支撑和有支撑空腔在移动法向和扭转载荷作用下的动态响应

Bulletin of the Karaganda University "Physics Series" Pub Date : 2023-12-15 DOI: 10.31489/2023ph4/65-75

V. Ukrainets, S. Girnis, K.T. Makashev, V.T. Stanevich

{"title":"Dynamic response of unsupported and supported cavities in an elastic half-space under moving normal and torsional loads","authors":"V. Ukrainets, S. Girnis, K.T. Makashev, V.T. Stanevich","doi":"10.31489/2023ph4/65-75","DOIUrl":"https://doi.org/10.31489/2023ph4/65-75","url":null,"abstract":"This study explores the impact of uniformly moving normal and torsional loads along an infinitely long circular cylindrical cavity, situated within a half-space (body), on the behavior of the elastic half-space. The cavity is either unreinforced or reinforced by a thin-walled elastic shell. To describe the motion of the body and the shell, dynamic equations of elasticity theory in the Lamé potentials and equations of the classical shell theory are used, respectively. The equations are represented in coordinate systems moving together with the loads (cylindrical or Cartesian). The method of integral Fourier transform is used to determine the stress-strain state (SSS) of the half-space. The solution to this problem considers waves reflected from the boundary of the half-space, which occur during the movement of loads, instead of assuming the body is an elastic space like similar works. The results of numerical experiments are presented, illustrating the influence of the shell on the deformed state of the half-space boundary under the action of axisymmetric normal and shear loads, which are uniformly applied within a certain range and move at a constant speed.","PeriodicalId":505293,"journal":{"name":"Bulletin of the Karaganda University \"Physics Series\"","volume":"213 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139178907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of the thickness of phthalocyanine films and its metal complexes on optical and electrical properties 酞菁薄膜及其金属复合物的厚度对光学和电学特性的影响

Bulletin of the Karaganda University "Physics Series" Pub Date : 2023-12-15 DOI: 10.31489/2023ph4/14-22

S.K. Tazhibayev, M.K. Beisembekov, X. Rozhkova, A. Zhakanova, A. Aimukhanov, A.T. Makhabayeva, A. Zeinidenov

{"title":"Impact of the thickness of phthalocyanine films and its metal complexes on optical and electrical properties","authors":"S.K. Tazhibayev, M.K. Beisembekov, X. Rozhkova, A. Zhakanova, A. Aimukhanov, A.T. Makhabayeva, A. Zeinidenov","doi":"10.31489/2023ph4/14-22","DOIUrl":"https://doi.org/10.31489/2023ph4/14-22","url":null,"abstract":"The paper presents the results of a study of the structural, optical and electrophysical characteristics of phthalocyanine films and its metal complexes with different thicknesses. Films of phthalocyanine and its metal complexes were obtained on the conductive surface of the FTO by thermal evaporation in vacuum. It is shown that the observed broadening of the B and Q bands and the hypsochromic shift of the maxima in the absorption spectra are associated with the central atom. With a decrease in the thickness of MPc films, there is a decrease in the value of the half-width of the absorption spectra. The effect of the thickness of phthalocyanine films on the efficiency of generation and transport of charge carriers in the FTO/MPc/Al cell was studied. It is shown that the VAC increases almost 2.5 times compared to a photocell based on a metal-free phthalocyanine. From the obtained impedance measurement data, it was found that the electrophysical parameters of phthalocyanines depend on the values of optical density, broadening of absorption bands in the short-wave and visible spectral regions, which is consistent with the data of the volt-ampere characteristic.","PeriodicalId":505293,"journal":{"name":"Bulletin of the Karaganda University \"Physics Series\"","volume":"68 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139178624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of TNR/Ag/rGO film area on its photocatalytic activity TNR/Ag/rGO 薄膜面积对其光催化活性的影响

Bulletin of the Karaganda University "Physics Series" Pub Date : 2023-12-15 DOI: 10.31489/2023ph4/6-13

A. Kayumova, S.V. Savilov, P. Zhanbirbayeva, A. Baltabekov, M.S. Dzhakupova, T. Serikov

{"title":"Effect of TNR/Ag/rGO film area on its photocatalytic activity","authors":"A. Kayumova, S.V. Savilov, P. Zhanbirbayeva, A. Baltabekov, M.S. Dzhakupova, T. Serikov","doi":"10.31489/2023ph4/6-13","DOIUrl":"https://doi.org/10.31489/2023ph4/6-13","url":null,"abstract":"This paper presents the results of a study of the effect of the area of nanocomposite films formed by titanium dioxide nanorods, silver nanoparticles and reduced graphene oxide (TNR/Ag/rGO) on its photocatalytic activity. The active area of the nanocomposite films was S=1cm2, S=1.5cm2, S=2cm2, S=3cm2. The photocatalytic activity of the samples was assessed by the value of the generated photocurrent per unit surface of the film and the photodegradation of the methylene blue dye when the surface was illuminated with a light source from a xenon lamp (300 W). A film with an area of 1 cm2 generated 0.00042 A/cm2. With increasing film area S=1.5 cm2, S=2cm2, S=3cm2, the photocurrent density was 0.00035 A/cm2, 0.00028 A/cm2, 0.00013 A/cm2, respectively. It was found that in the absence of a nanocomposite film, the degradation of the dye is negligible. When the TNR/Ag/rGO film was immersed in a dye solution, the degradation of the dye increased and amounted to 32, 59, 70 and 81 % for S=1cm2, S=1.5 cm2, S=2cm2, S=3cm2 with an irradiation duration of 240 minutes. The results obtained suggested that as the active surface area of the films increases, their photocatalytic activity decreases. The decrease in photocatalytic activity is associated with surface defects and an increase in film resistance.","PeriodicalId":505293,"journal":{"name":"Bulletin of the Karaganda University \"Physics Series\"","volume":"64 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139177590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical modelling of multi-component mass transfer regimes in four-component gas systems 四组份气体系统中多组份传质机制的数值模拟

Bulletin of the Karaganda University "Physics Series" Pub Date : 2023-12-15 DOI: 10.31489/2023ph4/38-49

O. Fedorenko, V. Kossov, S.A. Krasikov, M. Zhaneli, T. Seydaz

{"title":"Numerical modelling of multi-component mass transfer regimes in four-component gas systems","authors":"O. Fedorenko, V. Kossov, S.A. Krasikov, M. Zhaneli, T. Seydaz","doi":"10.31489/2023ph4/38-49","DOIUrl":"https://doi.org/10.31489/2023ph4/38-49","url":null,"abstract":"For argon and carbon dioxide, which are part of the tetra-component gas mixture He + Ar + CO2 – N2 and are the heaviest compared to other components, graphs of the behavior of the concentration of these components at different points of the diffusion channel and time intervals are presented. To simulate convective flows in the four-component mixture under consideration, the Flow Simulation computer package included in the SolidWorks engineering design system was used. The equations are solved by the finite volume method using the standard k – ε turbulence model and with initial and boundary conditions. Indicated, that obtained distributions change nonlinearly both in time and along the length of the diffusion channel. In this case, there is a change in the diffusion process to a convective one, which is due to the nonlinearity in the distribution of the components concentration, which is connected with the imbalance of mechanical equilibrium. It was found that the most significant change in the behavior of the concentrations of heavy-weight components occurs within 120 s. This time interval coincides with the appearance of two contrasting areas on the graphs, namely, the formation of a developed convective flow. An enhancement in the time of the numerical experiment showed that the concentration of the component with the maximal molar mass remains practically unchanged. This behavior of the concentration of heavy-weight components is characteristic of the effect when the mixture is enriched in the heavy-weight component. An analysis of the streamlines on the plots of concentration distributions showed that vortices of various scales interacting with each other and leading to a pulsating mixing regime are formed along the length of the channel. It has been established that the presence of large-scale vortices determines the preferential migration of the components with the maximal molar mass.","PeriodicalId":505293,"journal":{"name":"Bulletin of the Karaganda University \"Physics Series\"","volume":"703 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139178577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0