Bulletin of the University of Karaganda-Physics最新文献_第9页

The influence of the solution of their amount on the process of water splitting by the electrolysis method 它们的溶液量对电解解水过程的影响

IF 0.4

Bulletin of the University of Karaganda-Physics Pub Date : 2022-03-30 DOI: 10.31489/2022ph1/123-129

A.B. Kuanyshbekova, T. Serikov, P. Zhanbirbayeva, A. Sadykova, G.T. Beisembaeva, A. Baltabekov

{"title":"The influence of the solution of their amount on the process of water splitting by the electrolysis method","authors":"A.B. Kuanyshbekova, T. Serikov, P. Zhanbirbayeva, A. Sadykova, G.T. Beisembaeva, A. Baltabekov","doi":"10.31489/2022ph1/123-129","DOIUrl":"https://doi.org/10.31489/2022ph1/123-129","url":null,"abstract":"The article presents the results of an experimental study of the effect of the solution and their concentration on the process of splitting water by electrolysis under the action of a direct electric current using a Hoffman device. As solutions, we used sodium hydroxide, sodium phosphoric acid, sodium carbonate, sodium sulfate, sodium metaborate, sodium phosphoric acid 2 — substituted and potassium hydroxide. The number of salts in the solution varied from 0.2 mol to 0.8 mol. The study showed that the splitting water at constant current and voltage is influenced by both the nature of salts and their quantity. So, it was found that with the same amount of substances in the solution, the process of splitting water occurs faster in a solution containing potassium hydroxide. When using an aqueous KOH solution in an amount of 0.2 mol, the volume of hydrogen released was 15 ml, and at 0.8 mol, 19.5 ml. Using an aqueous solution of sodium metaborate with a similar concentration, the volume of hydrogen released was 2 ml and 4.5 ml, respectively. The obtained results allow to choose the solution and its amount during the process of photocatalytic splitting of water.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42391312","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

Selection of inoculant additives for modifying nickel alloys 镍合金改性孕育剂添加剂的选择

IF 0.4

Bulletin of the University of Karaganda-Physics Pub Date : 2022-03-30 DOI: 10.31489/2022ph1/81-88

E. Eremin

{"title":"Selection of inoculant additives for modifying nickel alloys","authors":"E. Eremin","doi":"10.31489/2022ph1/81-88","DOIUrl":"https://doi.org/10.31489/2022ph1/81-88","url":null,"abstract":"Heat-resistant nickel alloys are widely used in the production of castings for aircraft and industrial gas turbine engines. Structural factors are the main determinants of the performance properties of cast nickel alloys. The main disadvantage of castings obtained from these alloys is the coarse-crystalline structure, uneven grain size and columnar crystals in the cross-section. Therefore, the creation of an optimal alloy structure is an important condition for obtaining high properties and ensuring the increased operability of cast parts. Obtaining a fine-grained structure has a beneficial effect on the level of mechanical and operational properties of cast metal. The most promising way to create such a structure is to introduce a small number of additives into the melt that cause heterogeneous formation of crystal nuclei, i.e. modification of the melt with dispersed particles of refractory elements and inocular compounds. To select the type of inocular particles required to initiate crystallization of a particular phase, it is necessary to have a set of data that allows one to form a theoretical understanding of the principles of such a choice. The paper provides a rationale for the selection of the type of particles of inoculators capable of causing the process of artificial changes in the structure of cast metal. For a heat-resistant nickel alloy, the use of refractory particles of ultra-dispersed titanium carbo nitride powder as inoculators are the most effective. When introduced into the melt 0.025 wt. % of such particles, a fine-grained structure of the alloy is obtained, and its ductility in comparison with the unmodified one is more than doubled","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43813959","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

Reconstruction of cosmological models are inspired by generalization of the Chaplygin gas 宇宙学模型的重建受到了Chaplygin气体推广的启发

IF 0.4

Bulletin of the University of Karaganda-Physics Pub Date : 2022-03-30 DOI: 10.31489/2022ph1/27-34

P. Tsyba, O. Razina, N. Suikimbayeva

{"title":"Reconstruction of cosmological models are inspired by generalization of the Chaplygin gas","authors":"P. Tsyba, O. Razina, N. Suikimbayeva","doi":"10.31489/2022ph1/27-34","DOIUrl":"https://doi.org/10.31489/2022ph1/27-34","url":null,"abstract":"This paper considers models arising from the composition of the modified Gauss–Bonnet gravity (the Gauss– Bonnet invariant) and the general relativity (the Ricci scalar) against the background of a flat, homogeneous, and isotropic space-time described by the Friedmann–Robertson–Walker metric. Advantages arising from applying a theory containing higher-order invariants (Gauss–Bonnet invariant) consist in the presence of additional degrees of freedom, which makes it possible to study the influence of small-order effects on the dynamics of the system under study, which are in search and confirmed by cosmological observational data. We reconstructed two models with a power-law and exponential dependence on the Gauss–Bonnet invariant, where the model ansatz is a combination of the inverse Weierstrass elliptic function and the power-law function describing the Hubble parameter. This facilitates obtaining a quasi-Dieter law of the change of the scale factor in the initial and late epochs of the Universe. The application of the special function is inspired by generalization equation of state of the Chaplygin gas type, the Weierstrass gas. The application of the equation of state with such dependence makes allows obtaining a quasi-periodic universe. The equations of state are based on the Chaplygin gas are model equations of state and describe well the evolution of both the early and the modern universe. The obtained two particular models are investigated for the fulfillment of the energy conditions, which makes it possible to carry out analysis at a late stage of evolution of the universe and using perturbation theory covering the period of the early universe. For the power-law and exponential models, the perturbations of the Hubble parameter decrease in a finite time are shown, providing a way out of the inflationary stage of evolution of the universe.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44179629","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

Preparation of bio-ceramic composite coatings on Ti6Al4V titanium alloy by gas-detonation spraying Ti6Al4V钛合金气爆喷涂制备生物陶瓷复合涂层

IF 0.4

Bulletin of the University of Karaganda-Physics Pub Date : 2022-03-30 DOI: 10.31489/2022ph1/89-98

D. Baizhan, B. Rakhadilov, L. Zhurerova, K. Torebek

{"title":"Preparation of bio-ceramic composite coatings on Ti6Al4V titanium alloy by gas-detonation spraying","authors":"D. Baizhan, B. Rakhadilov, L. Zhurerova, K. Torebek","doi":"10.31489/2022ph1/89-98","DOIUrl":"https://doi.org/10.31489/2022ph1/89-98","url":null,"abstract":"The paper presents study of a new approach to manufacturing carrier implants with a combination of bioactivity, biocompatibility, and mechanical properties, composite powders of hydroxyapatite and titanium with a mass content of 50:50 % when sprayed by gas detonation spraying. Experimental studies of the surface morphology and cross-section microstructure, phase composition and mechanical properties of HATi composite coatings are obtained. The experimental results showed that the cross-section microstructures of HATi composite coatings are typical plate structures comprising curved strips formed by well-deformed and oxidized Ti plates and limited deformed HA plates. Composite coatings’ morphology and phase states were studied using scanning electron microscopy and X-ray diffractometry. It was found that the deprived coatings mainly consist of the phases HA, Ti and TiO. The elemental composition study results designated that the atomic ratio of calcium and phosphorus in the obtained coatings is Ca/P ~ 1.64, which is close to the value of the initial powder — Ca/P ~ 1.67. This indicates a limited change in the chemical composition during the coating formation.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43457808","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: 1

Scientific foundations of the movement of components of grain material with an artificially formed distribution of air velocity 人工形成气流速度分布的颗粒材料成分运动的科学基础

IF 0.4

Bulletin of the University of Karaganda-Physics Pub Date : 2022-03-30 DOI: 10.31489/2022ph1/43-57

S. Stepanenko, B. Kotov, A. Spirin, V. Kucheruk

{"title":"Scientific foundations of the movement of components of grain material with an artificially formed distribution of air velocity","authors":"S. Stepanenko, B. Kotov, A. Spirin, V. Kucheruk","doi":"10.31489/2022ph1/43-57","DOIUrl":"https://doi.org/10.31489/2022ph1/43-57","url":null,"abstract":"The article examines the study of the separation of grain materials in pneumatic channels with an artificially generated distribution of air velocity in the cross-section channel to determine the rational form and parameters of the material supply and options for grain material separation into fractions. The regularities of the weevil movement were theoretically investigated and established in the form of mathematical models of the dynamics of the movement of a solid particle in airflow, which differ from the known ones by taking into account the action of lateral forces, the concentration of the material, and the use of a power-law and an artificially formed exponential law of air distribution facilitated to increase the differences (splitting) trajectories of caryopses by 20 %. The solution of the system of nonlinear differential equations with initial conditions is performed in the Mathcad software environment in the form of trajectories of the grain in the air flow. It allows calculating their trajectories, which differ in windage coefficients and determine the rational values of the parameters of pneumo-gravity and pneumo-inertia separators. Using the obtained dependencies for the development of air separators contributes to determine the initial speed of entry and the direction of entry of the kernels into the airflow, as well as to determine the trajectories of material movement in the air channels with the bottom unloading of material.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48532764","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

Research of regimes of applying coats by the method of plasma electrolytic oxidation on Ti-6Al-4V Ti-6Al-4V等离子体电解氧化涂膜制度的研究

IF 0.4

Bulletin of the University of Karaganda-Physics Pub Date : 2022-03-30 DOI: 10.31489/2022ph1/99-106

B. Rakhadilov, D. Baizhan, Zhuldyz Sagdoldina, K. Torebek

{"title":"Research of regimes of applying coats by the method of plasma electrolytic oxidation on Ti-6Al-4V","authors":"B. Rakhadilov, D. Baizhan, Zhuldyz Sagdoldina, K. Torebek","doi":"10.31489/2022ph1/99-106","DOIUrl":"https://doi.org/10.31489/2022ph1/99-106","url":null,"abstract":"In this work, ceramic coatings were formed on Ti6Al4V titanium alloy using a technique of plasma electrolytic oxidation. Plasma electrolytic oxidation was carried out in electrolytes with different chemical compositions and the effect of the electrolyte on the macro-and microstructure, pore size, phase composition and wear resistance of coatings was estimated. Three types of electrolytes based on sodium compounds were used, including phosphate, hydroxide, and silicate. The composition of the electrolyte affects the intensity and size of microcharges and the volume of gas release of various electrolytes. The plasma electrolytic oxidation processes were carried out at a fixed voltage (270 V) for 5 minutes. The results showed that the coating was mainly composed of rutile- and anatase TiO2 , but a homogeneous structure with lower porosity and a large number of crystalline anatase phases was obtained in the coating prepared in the silicate-based electrolyte. The diffractogram electrolytes did not reveal the peaks of the crystalline phases associated with the PO4 3— and SiO3 2— anions. This means that these anions included only oxygen in the coatings. The morphology and phase composition of the samples were studied using a scanning electron microscope and an X-ray diffractometer, respectively. Wear resistance was evaluated by the “ball-disc” method on the TRB3 tribometer. The wear resistance of various coatings formed on Ti6Al4V titanium alloys showed completely different wear resistance. The lowest coefficient of friction (µ = 0.3) was demonstrated by the coating obtained based on phosphate. This may be due to a large number of crystal phases of rutile. The sample prepared in a hydroxide-based electrolyte showed a high wear coefficient (µ=0.52). This effect can be obtained by eliminating surface defects (microcracks and micropores).","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69839648","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

Electric pulse method of processing cullet 电脉冲法处理碎玻璃

IF 0.4

Bulletin of the University of Karaganda-Physics Pub Date : 2022-03-30 DOI: 10.31489/2022ph1/75-80

A. Khassenov, B. Nussupbekov, D. Karabekova, G. Bulkairova, B.U. Shashubai, M. Bolatbekova

{"title":"Electric pulse method of processing cullet","authors":"A. Khassenov, B. Nussupbekov, D. Karabekova, G. Bulkairova, B.U. Shashubai, M. Bolatbekova","doi":"10.31489/2022ph1/75-80","DOIUrl":"https://doi.org/10.31489/2022ph1/75-80","url":null,"abstract":"The article considers the issue of obtaining a recycling resource during the processing cullet, which harms the environment. During the preparation of raw materials in the household waste recycling stages, the material is crushed to the right size. This is implemented in mills based on various methods of destruction. In this regard, analyses of the currently existing types of mechanical mills were carried out and their disadvantages were investigated. To solve glass recycling problem, this study presents the results of processing cullet by the electric pulse method. We provide a description of operation principle of the experimental setup and the design of the working chamber for processing the material under study. In this technology, the processing cullet is carried out with an increase in the discharge voltage of the storage from 25 kV to 35 kV, the capacitor capacity from 0,25µF to 1 µF, the number of pulse discharges from 100 to 600. By using the electric pulse method particles cullet with an initial fraction of 2 mm and 5 mm were crushed from 1 mm to 0.1 mm. The dependence of the output of the final product on the electrical parameters of the installation and the diameter of the obtained glass powder were received. The results of the grinding raw materials with the formation of pulsed electric discharges in a liquid medium allowed assessing the degree of grinding of the material. According to the obtained research data, optimal parameters of cullet grinding were established.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46199456","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

Intellectual system for automated determination of the quality of natural stones surfaces processing 天然石材表面加工质量自动检测的智能系统

IF 0.4

Bulletin of the University of Karaganda-Physics Pub Date : 2022-03-30 DOI: 10.31489/2022ph1/15-26

I. Cherepanska, A. Sazonov, S. V. Kalchuk, О.F. Sokolovskyi, О. Sivaieva

{"title":"Intellectual system for automated determination of the quality of natural stones surfaces processing","authors":"I. Cherepanska, A. Sazonov, S. V. Kalchuk, О.F. Sokolovskyi, О. Sivaieva","doi":"10.31489/2022ph1/15-26","DOIUrl":"https://doi.org/10.31489/2022ph1/15-26","url":null,"abstract":"This automation of determination of the quality of natural stone surfaces processing is a relevant problem. It provides an intellectual system for automated determination of the quality of processing surfaces of natural stones (ISADQSS), which allows rapid assessment of the quality of stone surfaces, including roughness, with high accuracy and quick action in automatic mode and real time. The measurement result is independent of the humidity and cleanliness of the outer surface. The root mean square error of the proposed ISADQSS does not exceed 5%, the time to determine the value of the roughness is not over 2 s. ISADQSS is based on the principles of synergetic integration of various technical automation devices with different properties – artificial neural networks (ANN) (in the case of their implementation in the form of neuroprocessors), as well as the so-called registrar of main drive currents (RMDC), which is used as a sensor sensitive to changes in the rubbing force of the stone-cutting tool depending on changes in the roughness value of the machined surface. The proposed ISADQSS is an innovative and promising development that combines such advantages as high accuracy and speed, versatility and ease of use.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44653636","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 formation of the mixed anions PAsO7 in solid solutions Mg2P2O7 — Mg2As2O7 Mg2P2O7 - Mg2As2O7固溶体中混合阴离子PAsO7的形成

IF 0.4

Bulletin of the University of Karaganda-Physics Pub Date : 2022-03-30 DOI: 10.31489/2022ph1/117-122

N. Mazhenov, Z.R. Syzdykova

{"title":"The formation of the mixed anions PAsO7 in solid solutions Mg2P2O7 — Mg2As2O7","authors":"N. Mazhenov, Z.R. Syzdykova","doi":"10.31489/2022ph1/117-122","DOIUrl":"https://doi.org/10.31489/2022ph1/117-122","url":null,"abstract":"The article presents structural features at formation of solid solutions of the isostructural Mg2P2O7 and Mg2As2O7 connections. In these compounds, complex Р2О7 4- anions, As2O2 4- , as well as the formation of complex PAsO7 4 anions, is not natural. The formation of solid solutions is confirmed by the linear dependence of x-ray debaegram and optical refractive indices, depending on the concentration of P/As. In the article, phosphates are involved in energy processes in cells. For the first time, the formation of mixed anions in polyphosphates has been proven. The oscillatory spectra of pyro anions have intervals of localization of terminal and bridging groups of atoms that have no intersection regions. Strip at 662–670 cm-1 (between structures from P: As=0.8:0.2 to 0.1–0.9), located between vsPOP frequency in ᵦ — Mg2P2O7 at 737 cm-1 and the frequencies about 550 cm-1 characteristic of fluctuations of vsAsOAs in alkaline pyroarsenates, is interpreted as a strip of fluctuations of vsPOAs of the mixed PAsO7 ions. In the area, the strip at 925–902 cm-1 is located between frequencies of fluctuations of vasPOP and vasAsOAs. The fluctuations of mastic group P-O found in ranges of infrared absorption allow establishing knowledge of the adjacent anions (PAsO7 ) 4- that it is possible to confirm with quantum-chemical calculations in the subsequent.","PeriodicalId":29904,"journal":{"name":"Bulletin of the University of Karaganda-Physics","volume":" ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45700262","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 Detonation Spray Parameters on the Formation of Mechanical and Tribological Properties of Gradient Coatings based on Alumina 爆轰喷雾参数对氧化铝梯度涂层力学和摩擦学性能形成的影响

IF 0.4

Bulletin of the University of Karaganda-Physics Pub Date : 2022-03-30 DOI: 10.31489/2022ph1/6-14

N. Kantay, B. Rakhadilov, A. Nabioldina, M. Paszkowski

引用次数: 0