Bulletin of the University of Karaganda-Physics最新文献_第5页

Formation of TiN coatings by air plasma spraying 空气等离子喷涂TiN涂层的形成

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-12-30 DOI: 10.31489/2022ph4/22-31

A. Kengesbekov, B. Rakhadilov, L. Zhurerova, G. Uazyrkhanova, Y. Kambarov

{"title":"Formation of TiN coatings by air plasma spraying","authors":"A. Kengesbekov, B. Rakhadilov, L. Zhurerova, G. Uazyrkhanova, Y. Kambarov","doi":"10.31489/2022ph4/22-31","DOIUrl":"https://doi.org/10.31489/2022ph4/22-31","url":null,"abstract":"Titanium nitride (TiN) coatings were obtained on the surface of 12Kh18N10T steel by air plasma spraying (APS) of TiN powders using an arc plasmatron made by the authors. The plasmatron has a node of circular input and gas-dynamic focusing of the powder and the output apertures of the nozzle-anode are made in the form of rectangular narrowing-expanding channels (No.34334 RK: IPC H05H 1/42). A study of operation modes of a plasmatron for spraying of powder coatings was carried out. The structural-phase state, microhardness and wear resistance of TiN coatings were systematically investigated. The optimum APS operating mode for deposition of TiN powder was determined: current 250 A, voltage 68 V, argon gas flow 34 L/min, spraying distance 150 mm. To reduce the oxidation of TiN powder in the APS process, a method of creating a nitrogen environment at the outlet of the anode nozzle, nitrogen flow rate 2.3 bar was used. The results of structural analysis showed that TiN is the main phase of the coating. The mechanism of formation of TiN structures was characterized by analyzing SEM results of TiN coating surface morphology and TiN droplets sprayed on the surface of the sample. The results showed that the TiN(1) coating has better wear resistance than the TiN(2) and TiN(3) coatings. The cross-sectional and longitudinal microhardness of the TiN coating was investigated. The highest cross-sectional hardness of TiN coating is 1250 HV0.1, which is in accordance with mode 1.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47098111","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

Resistance evaluation of electrical insulating polymer materials used in flexible cables to operational impact 柔性电缆用电绝缘聚合物材料对操作冲击的电阻评估

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-12-30 DOI: 10.31489/2022ph4/72-84

A. Leonov, T. Soldatenko

{"title":"Resistance evaluation of electrical insulating polymer materials used in flexible cables to operational impact","authors":"A. Leonov, T. Soldatenko","doi":"10.31489/2022ph4/72-84","DOIUrl":"https://doi.org/10.31489/2022ph4/72-84","url":null,"abstract":"The article presents the test results of polymer material properties taking into account the possibility of their application for flexible cables insulation. The main types of cable constructions and their operation features are considered. Existing test determination methods of insulation resistance to thermal, mechanical, electrical and environmental conditions are analyzed. Requirements for laboratory equipment and test conditions are given. Evaluation criteria of test results are noted. Experimental evaluation was carried out for change degree in the properties of the main types of electrical insulation materials used currently during the flexible cable production: polyvinyl chloride compound (PVC), rubber, ethylene propylene rubber (EPR), thermoplastic elastomer (TPE), fluoropolymer. Tests were carried out under the influence of high and low temperatures, aggressive environments, ozone, mechanical loads. The main processes that determine the changes in electrophysical, physical and mechanical properties of the studied materials are described. Resistance of EPR, TPE and fluoropolymer insulation to a wide range of temperatures, mechanical loads, diesel fuel and transformer oil are shown. An increased resistance of EPR to ozone was also noted. Rubber and PVC compound did not pass the tests under the influence of low and high temperatures, showed \"poor\" resistance to aggressive environments, but passed the mechanical stress tests. Recommendations on tests and application of polymer insulation taking into account the specifics of flexible cables working are presented.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42046148","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

Plasmon effect on triplet-singlet energy transfer in the dye-doped Langmuir-Blodgett films 等离激元对染料掺杂Langmuir-Blodgett薄膜中三重态-单线态能量传递的影响

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-12-30 DOI: 10.31489/2022ph4/6-13

D. Temirbayeva, N. Ibrayev, E. Seliverstova, M. Kudinova, A. Ishchenko

{"title":"Plasmon effect on triplet-singlet energy transfer in the dye-doped Langmuir-Blodgett films","authors":"D. Temirbayeva, N. Ibrayev, E. Seliverstova, M. Kudinova, A. Ishchenko","doi":"10.31489/2022ph4/6-13","DOIUrl":"https://doi.org/10.31489/2022ph4/6-13","url":null,"abstract":"The effect of silver plasmonic nanoparticles on triplet-singlet energy transfer in the donor-acceptor pair of organic dyes was studied. Layered dye films were prepared on the surface of glass and island silver films using the Langmuir-Blodgett method. Amphiphilic analogs of Rose bengal and polymethine dye were used as donor and acceptor of energy. A polymer monolayer was deposited between monolayers of donor and acceptor molecules to exclude the competing triplet-triplet energy transfer. The spectra of delayed fluorescence and phosphorescence of donor-acceptor films and the delayed luminescence lifetime of donor in these films have been measured. It is shown that a threefold increase in the fluorescence intensity and a twofold increase in the donor phosphorescence intensity are observed on silver island films. The successful triplet-singlet energy transfer is evidenced by both the quenching of donor centers and appearance of sensitized delayed fluorescence of the acceptor with the duration close to the donor triplet lifetime. In the presence of silver nanoparticles, in addition to enhancement in the intensity of the donor emission, an increase in the efficiency of tripletsinglet energy transfer was observed. The obtained results can be used in various optical devices.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45757913","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

Influence of modification of the cast metal structure by solid phase particles on the nucleation of crystallization centers and their stability 固相颗粒对铸造金属组织的改性对结晶中心成核及其稳定性的影响

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-12-30 DOI: 10.31489/2022ph4/85-93

E. Eremin

{"title":"Influence of modification of the cast metal structure by solid phase particles on the nucleation of crystallization centers and their stability","authors":"E. Eremin","doi":"10.31489/2022ph4/85-93","DOIUrl":"https://doi.org/10.31489/2022ph4/85-93","url":null,"abstract":"The inoculation method has wide possibilities for improving the mechanical and operational properties of cast metal, which makes it possible to create artificial centers of crystallization due to the direct introduction of dispersed refractory particles into the melt. The efficiency of such particles serving as crystallization centers is due to the presence of an activated transition layer on their surface. In this regard, it is promising to use complex modification, in which activating additives are introduced into the melt together with dispersed refractory particles, which form a transition layer with the desired properties on the particles. At the same time, the features of the interaction of particles with activating additives have not been sufficiently studied. A theoretical assessment of the influence of dispersed particles on the nucleation of crystallization centers and their stability was carried out on the basis of a study of the phenomena of wetting, adsorption, and dissolution using the relationship between the critical size of additional nuclei, their wetting angle, and supercooling of the melt. It is shown that if between the particle and the cladding layer the difference in chemical potentials of the contacting phases will exist throughout the entire process, and on the surface of the complex it will have a low value of surface tension, then such a particle will be stable, which takes place during adsorption of a surface-active component from a melt. Therefore, the efficiency of melt heterogenization and modification of the cast metal structure is determined by the thermodynamic activity of the substance of the transition layer to the material of the solid phase particle. The obtained conclusions make it possible to select the composition of complex modifiers that allow controlling the structure of castings in the process of their crystallization.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41677125","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

Some technological aspects of cleaning pipes of heat exchangers from solid scale deposits 热交换器管道固体结垢清理的若干技术问题

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-12-30 DOI: 10.31489/2022ph4/106-114

B. Nussupbekov, S. Sakipova, D. Ospanova, B. Kutum, K. Shaimerdenova, Zh. S. Bekturganov

{"title":"Some technological aspects of cleaning pipes of heat exchangers from solid scale deposits","authors":"B. Nussupbekov, S. Sakipova, D. Ospanova, B. Kutum, K. Shaimerdenova, Zh. S. Bekturganov","doi":"10.31489/2022ph4/106-114","DOIUrl":"https://doi.org/10.31489/2022ph4/106-114","url":null,"abstract":"This article discusses possible solutions to one of the problems associated with the low efficiency of existing thermal power plants. These factors are due to both the depreciation of equipment and the lack of any effective technologies for intensifying heat and mass transfer processes. The relevance of research topics is also confirmed by the fact that at the state level it is proposed to legally oblige the subjects of the heat and power industry to carry out preventive measures aimed at optimizing existing enterprises. The description of the reasons for the occurrence of scale deposits that appear in the in-line cavities is given. Due to the fact that the thermal conductivity of solid deposits is much less than the thermal conductivity of the metals from which the heat exchanger tubes are made, they significantly reduce the intensity of the processes and the intensity of heat transfer. Solid deposits lead to a decrease in the coolant flow rate, an increase in fuel consumption and a violation of the technological mode of operation of the entire heat exchange unit. The authors analyzed various technological aspects of various methods for cleaning heat exchanger tubes from solid scale deposits, on the basis of which the advantages of the electrohydraulic treatment method are substantiated. A schematic diagram of the device is given and a brief description of the method of cleaning the pipes of heat exchangers from solid scale deposits is given using electro-hydro-pulse action. The results of the application of this technology for cleaning heat exchange pipes at specific heat and power enterprises are shown, which confirm its advantages over other cleaning methods, both in terms of processing time and energy costs. The influence of the degree of purification of heat exchange pipes from solid deposits on the thermophysical parameters and efficiency of the heat exchanger is considered.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45855793","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: 2

Finite element modeling of heat propagation of a complete rod of constant cross-section 等截面完整杆件热传播的有限元建模

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-12-30 DOI: 10.31489/2022ph4/94-105

B. Kenzhegulov, S.B. Kenzhegulova, D. B. Alibiyev, A.Sh. Kazhikenova

{"title":"Finite element modeling of heat propagation of a complete rod of constant cross-section","authors":"B. Kenzhegulov, S.B. Kenzhegulova, D. B. Alibiyev, A.Sh. Kazhikenova","doi":"10.31489/2022ph4/94-105","DOIUrl":"https://doi.org/10.31489/2022ph4/94-105","url":null,"abstract":"In this paper, the definition of the temperature distribution field for a rod made of heat-resistant alloy EI48 is introduced. The authors consider for the study a complete rod of circular cross-section of radius R, of limited length L. Studied body is under the influence of a heat flow q from the surface over the entire cross-sectional area of the left end, and heat exchange with the environment occurs on the cross-sectional area of the right end. The rod is thermally insulated along the side surface. The authors consider two cases: the first is the heat flow with intensity q can be set on the area of a small circle with radius r <R, the second is the heat flow can be set on its part, that is, on the area 2 2   R     . During the study, the authors showed that during the thermomechanical process, the strength of each section of the load-bearing structural elements is significantly influenced by the temperature distribution field. The influence of high temperature on the morphology of heat-resistant alloys is also shown. This leads to the fact that in some parts of the structural elements the temperature will be acceptable, and in some — critical. As a result, rapid wear of structural elements and loss of their physical qualities occur. Therefore, mathematical modeling of temperature distribution field for a body of various configurations is an urgent problem. The article presents a method for constructing a mathematical model and a corresponding computational algorithm that allows solving a class of problems to determine the regularities of the temperature distribution field in the elements of rod-shaped structures. To do this, the authors used the energy-variation principle in combination with the finite element method.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48341714","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 frequency of current fluctuations in two-valley semiconductors in an external electric and strong magnetic (𝛍𝐇 > 𝒄) fields 两个谷半导体在外电和强磁环境中的电流波动频率(𝛍𝐇 > 𝒄) 字段

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-12-30 DOI: 10.31489/2022ph4/65-71

G. Mammadova

{"title":"The frequency of current fluctuations in two-valley semiconductors in an external electric and strong magnetic (𝛍𝐇 > 𝒄) fields","authors":"G. Mammadova","doi":"10.31489/2022ph4/65-71","DOIUrl":"https://doi.org/10.31489/2022ph4/65-71","url":null,"abstract":"Boltzmann's kinetic equations have not been used to date to study nonequilibrium phenomena in semiconductors, and therefore, to obtain analytical expressions for the oscillation frequency inside the semiconductor and the critical external electric field, it is of theoretical interest. In this theoretical work, the frequency of oscillations occurring inside a two-valley semiconductor of the GaAs type in an external constant electric field and in an external strong magnetic field (𝜇Н ≫ с, μ-mobility of charge carriers, H-magnetic field strength, cspeed of light) is calculated. It has been proved that the critical values of the external electric field fully correspond to the values of the electric field, which were obtained by the Gunn experiment. It is proved that unstable waves are excited in GaAs if the crystal dimensions are 𝐿𝑦 > 4𝐿𝑧 and 𝐿𝑥 ≪ 𝐿𝑦. Analytical expressions are obtained by theoretical calculation for an external constant magnetic field, when unstable oscillations are excited inside the sample. It is proved that the growth rate of the excited waves is much less than the wave propagation frequency𝛾 ≪ 𝜔0. Numerical comparisons of theoretical expressions for the frequency of oscillations are carried out using the data of the Gunn experiment 𝜔0~107 ÷ 109 Hz.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42610794","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

Photocatalytic activity of the TIO2/Ag/rGO nanocomposite TIO2/Ag/rGO纳米复合材料的光催化活性

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-12-30 DOI: 10.31489/2022ph4/14-21

T. Serikov, P. Zhanbirbayeva, A. Baltabekov, A.B. Kuanyshbekova

{"title":"Photocatalytic activity of the TIO2/Ag/rGO nanocomposite","authors":"T. Serikov, P. Zhanbirbayeva, A. Baltabekov, A.B. Kuanyshbekova","doi":"10.31489/2022ph4/14-21","DOIUrl":"https://doi.org/10.31489/2022ph4/14-21","url":null,"abstract":"The paper presents the results of a study of the photocatalytic activity of films formed by titanium dioxide nanorods doped with silver nanoparticles and reduced graphene oxide. The obtained nanocomposite materials were studied by optical spectroscopy, scanning electron microscopy, X-ray diffractometry, and Raman spectroscopy. The photocatalytic activity of the samples was evaluated by generating a photocurrent when the surface was illuminated by a modulated light source of a xenon lamp. In addition, the photocatalytic activity of the samples was evaluated by the degradation of the methylene blue dye, which is a model. It was found that the introduction of silver nanoparticles and reduced graphene oxide into the pores of films made of titanium dioxide nanorods leads to an increase in the spectral sensitivity of the sample in the region of 400-500 nm. The increased sensitivity of the sample to visible light leads to an increase in photocurrent generation and is 2.3 times higher than that of the original sample. Degradation of the methylene blue dye after 100 minutes of irradiation in the presence of a TiO2/Ag/rGO sample was 19 %. This is 3 times higher than in TiO2 nanorods films and 2.3 times higher than TiO2/Ag films. The results of the conducted studies have shown that the improvement of photocatalytic activity is associated with a decrease in film resistance, an expansion of spectral sensitivity and an increase in the surface area of the nanorods.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45491153","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

Non-standard analysis in electrical engineering. Transient analysis in second-order electrical circuits with violation of switching laws 电气工程中的非标准分析。违反开关律的二阶电路的暂态分析

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-12-30 DOI: 10.31489/2022ph4/56-64

S. Katsyv, V. Kukharchuk, V. Madyarov, V. Holodiuk, V. Kucheruk, P. Kulakov, M. Нribov

{"title":"Non-standard analysis in electrical engineering. Transient analysis in second-order electrical circuits with violation of switching laws","authors":"S. Katsyv, V. Kukharchuk, V. Madyarov, V. Holodiuk, V. Kucheruk, P. Kulakov, M. Нribov","doi":"10.31489/2022ph4/56-64","DOIUrl":"https://doi.org/10.31489/2022ph4/56-64","url":null,"abstract":"For the first time, the authors proposed the use of the mathematical apparatus of non-standard analysis to solve certain non-trivial problems of theoretical electrical engineering. It was established that the axiomatics of non-standard analysis allows to simplify the analysis of transient processes in high-order electric circuits when the switching laws are violated. It is shown that the application of non-standard analysis methods in theoretical electrical engineering provides an opportunity to use the traditional classical method of transient processes analysis of circuits with violation of switching laws. Only by using methods of non-standard analysis, it is possible to strictly prove the fulfillment of the law of energy conservation in such schemes. Also, examples of solving such tasks are given. It is recommended to expand the scope of application of non-standard methods of analysis in problems of various branches of science and technology, which use differential calculus and boundary transitions, and the solution of which is limited or impossible by standard approaches.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45744071","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

Investigation of the characteristics of an indirect plasma torch 间接等离子炬的特性研究

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Bulletin of the University of Karaganda-Physics Pub Date : 2022-09-30 DOI: 10.31489/2022ph3/80-89

A. Kengesbekov, Zhuldyz Sagdoldina, D. Buitkenov, I. Ocheredko, K. Torebek, S. Abdulina

{"title":"Investigation of the characteristics of an indirect plasma torch","authors":"A. Kengesbekov, Zhuldyz Sagdoldina, D. Buitkenov, I. Ocheredko, K. Torebek, S. Abdulina","doi":"10.31489/2022ph3/80-89","DOIUrl":"https://doi.org/10.31489/2022ph3/80-89","url":null,"abstract":"The main task of creating plasma technologies is to improve the operation parameters of its main element - the plasma torch, which is achieved by designing and constructing its main nodes. The paper analyzes the principles of designing a plasma torch and investigates the characteristics of an arc discharge plasma torch. The possibilities of increasing the thermal stability of the anode structure are considered; the speed and trajectory of powder particles are studied; the axial introduction of the powder through the cathode and the thermal stability of the cathode are studied. Using the finite element method, the effect of the anode shape on the service life of the plasma torch is studied by estimating the heat release power under the condition above the melting temperature of copper (anode). The optimal anode geometry for effective cooling of the unit with radial inlet and outlet of the coolant is determined. The influence of the thermal load on the cathode part of the plasma torch is studied, the thermophysical characteristics of the cathode on the operational characteristics of the plasma torch during the thermal load are taken. The dynamics of the particle by axial injection of the powder through the cathode is calculated, and the dynamics of the heating of the powder particle is determined. The output of the carrier gas is stabilized by a swirler and has great dynamics and is located in the high-temperature part of the arc. The trajectory of the movement of a powder particle in the nozzle area is calculated, which corresponds to the average value of the velocity ≈450-500 m/s. It is found that an increase in the cathode diameter from 3 to 5 mm reduces the thermal load by 50%.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42952123","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