Eurasian Physical Technical Journal最新文献

TUDY OF THE INFLUENCE OF THE ACCUMULATED DOSE OF DAMAGE IN THE NEAR-SURFACE LAYER ON RESISTANCE TO EXTERNAL INFLUENCES ASSOCIATED WITH CORROSION PROCESSES DURING HIGH-TEMPERATURE ANNEALING 研究近表层损伤累积剂量对高温退火过程中抵抗与腐蚀过程相关的外部影响的影响

Eurasian Physical Technical Journal Pub Date : 2024-03-29 DOI: 10.31489/2024no1/14-20

A. Kozlovskiy

{"title":"TUDY OF THE INFLUENCE OF THE ACCUMULATED DOSE OF DAMAGE IN THE NEAR-SURFACE LAYER ON RESISTANCE TO EXTERNAL INFLUENCES ASSOCIATED WITH CORROSION PROCESSES DURING HIGH-TEMPERATURE ANNEALING","authors":"A. Kozlovskiy","doi":"10.31489/2024no1/14-20","DOIUrl":"https://doi.org/10.31489/2024no1/14-20","url":null,"abstract":"Abstract. Investigating the challenges associated with the structural and strength degradation of ceramic fuel cells, which hold significant potential for hydrogen production through electrolysis methods, is a current focus ofresearch. Understanding the degradation processes and their occurrence rate is crucial in the assessment of the efficacy of these ceramics for applications in alternative energy production, specifically in the realm of hydrogen energy. The aim of this study is to ascertain the impact of doping ceramics with aluminum nitride NiAl2O4, irradiated with protons with a dose of approximately 50 dpa, on resistance to high-temperature degradation, and associated corrosive processes of oxidation and swelling, as well as migration processes of implanted hydrogen. Three types of ceramics were selected as objects for study: NiAl2O4ceramics, NiAl2O4ceramics stabilized with 0.05 M AlN, NiAl2O4ceramics stabilized with 0.15 M AlN, that are distinguished by the formation of impurity phases in Al7O3N8, with an orthorhombic type of crystal lattice. As a result of high-temperature tests, it was observed that NiAl2O4ceramics, when stabilized, exhibit reduced susceptibility to destructive alterations in strength characteristics, primarily attributed to the deformation distortion of the crystal structure caused by its swelling. These processes are associated with an augmentation in the thermal expansion of the crystal structure, manifested in the deformation swelling of the crystal lattice volume.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":"58 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140366109","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

SIMULATION OF MULTIPOINT CONTACT UNDER THERMOELECTRIC TESTING 热电测试下的多点接触模拟

Eurasian Physical Technical Journal Pub Date : 2024-03-29 DOI: 10.31489/2024no1/93-103

Soldatov A.A

引用次数: 0

MECHANISM OF FORMATION OF INTERNAL AND SURFACE DEFECTS IN CASTING AND THEIR TRANSFORMATION INTO SURFACE DEFECTS OF SHEET 铸件内部和表面缺陷的形成机理及其向板材表面缺陷的转化

Eurasian Physical Technical Journal Pub Date : 2024-03-29 DOI: 10.31489/2024no1/28-37

I.K. I.K. Ibraev

{"title":"MECHANISM OF FORMATION OF INTERNAL AND SURFACE DEFECTS IN CASTING AND THEIR TRANSFORMATION INTO SURFACE DEFECTS OF SHEET","authors":"I.K. I.K. Ibraev","doi":"10.31489/2024no1/28-37","DOIUrl":"https://doi.org/10.31489/2024no1/28-37","url":null,"abstract":"This study aimed to elucidate the formation mechanisms of micro-macrostructural heterogeneities in the ingot's cortical zone and their transformation into surface defects during heating, plastic deformation, and rolling processes. The methodology and results of studying the macro-and microstructural and chemical heterogeneities of ingots and finished rolled sheets are presented. A comparative method of structural-concentration analysis of metal at theend-to-end metallurgical processing stage of ingot -slab -rolled sheets was developed. The technique utilizes metallographic methods to study the structure and perform qualitative analysis of non-metallic inclusions. The research findings indicate that the quality of the rolled sheet surface is predominantly determined by the physical heterogeneity of the ingot's crust zone, while the internal defects in thin rolled sheets are largely influenced by the contamination of the metal with non-metallic inclusions. A novel mechanism is proposed for the transformation of defects in the casting cortical zone into surface and internal defects in rolled sheets. This study contributes to a deeper understanding of the formation and transformation of defects during metal processing, enabling the development of strategies for improving the quality of rolled sheets. Additionally, the study highlights the importance of controlling the physical heterogeneity of the ingot's crust zone and minimizing non-metallic inclusion contamination to achieve high-quality rolled sheets.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":"61 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367665","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 modeling of the process of extrusion of high-viscosity pastes 高粘度浆料挤压过程的数值模拟

Eurasian Physical Technical Journal Pub Date : 2024-03-29 DOI: 10.31489/2024no1/114-123

R. Gadirov

引用次数: 0

IMPROVING THE QUALITY OF EKIBASTUZ COAL USING THE DRY ENRICHMENT METHOD 利用干法浓缩提高埃基巴斯图兹煤的质量

Eurasian Physical Technical Journal Pub Date : 2024-03-29 DOI: 10.31489/2024no1/67-73

K. Shaimerdenova

引用次数: 0

INFLUENCE OF PLASMON EFFECT ON THE SENSITIZATION OF TITANIUM DIOXIDE BY DYE MOLECULES 等离子体效应对染料分子敏化二氧化钛的影响

Eurasian Physical Technical Journal Pub Date : 2024-03-29 DOI: 10.31489/2024no1/49-56

Auzhanova A.A, Ibrayev N.Kh, E. Seliverstova

引用次数: 0

Методика измерения диэлектрических коэффициентов полярных жидкостей в диапазоне микроволн 微波范围内极性液体介电系数的测量方法

Eurasian Physical Technical Journal Pub Date : 2024-03-29 DOI: 10.31489/2024no1/138-144

С А Азизов

{"title":"Методика измерения диэлектрических коэффициентов полярных жидкостей в диапазоне микроволн","authors":"С А Азизов","doi":"10.31489/2024no1/138-144","DOIUrl":"https://doi.org/10.31489/2024no1/138-144","url":null,"abstract":"В статье предложна методика измерения диэлектрических коэффициентов полярных жидкостей для исследования объектов с большими потерями. Известные резонансные методы определения диэлектрических коэффициентов являются наиболее точными при изучении диэлектриков с малыми потерями. Применение этих методов для исследования объектов с большими потерями ограничено тем, что при внесении образца добротность резонансной системы падает настолько сильно, что ее изучение и измерения существующими методами становится невозможным. В диапазоне частот от 50 КГц до 200 МГц наибольшее распространение получил метод измерения при помощи куметра. Данный прибор допускает определение значений добротности больше 50 – 30. Между тем, в области дисперсии электромагнитных волн, значения тангенса угла потерь tgδ = (ε\" / ε') зачастую превышают единицу. В этом случае применение известных методов измерения диэлектрических коэффициентов для исследования объектов с большими потерями неизбежно связано со столь большой погрешностью, что получаемые результаты не могут быть использованы для количественной интерпретации. Из – за простоты и удобства измерений при помощи куметра вопрос о расширении области измерения в сторону малых и больших потерь является приемлемым для исследований полярных жидкостей.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":"86 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140366374","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

REASON OF PITTING CORROSION OF MARTENSITIC STEELIN SEA WATER 马氏体钢在海水中发生点蚀的原因

Eurasian Physical Technical Journal Pub Date : 2024-03-29 DOI: 10.31489/2024no1/38-48

M.I. Baikenov

{"title":"REASON OF PITTING CORROSION OF MARTENSITIC STEELIN SEA WATER","authors":"M.I. Baikenov","doi":"10.31489/2024no1/38-48","DOIUrl":"https://doi.org/10.31489/2024no1/38-48","url":null,"abstract":"Abstract. The assumption that corrosion of products from X17 martensitic stainless steel in seawater occurs due to incomplete oxidation of chromium atoms in cells on the surface of the products is made in the presented work. Incomplete oxidation of chromium atoms occurs in the cells of X17 steel. This is due to the fact that oxygen molecules at temperatures up to 350 °C not having enough energy for chemical interaction with trivalent chromium atoms entering the cubic body-centeredcells of martensitic stainless steel. There is a significant decrease in the corrosion rate after placing X17 stainless steel products in 5% iodine solution in ethanol after pre-treatment of the product surface with active forms of oxygen. The treatment was carried out during 12 hours with chemically active forms of oxygen (ozone and singlet oxygen) at a temperature of 350 °С. Most of the chromium atoms on the surface of X17 steel samples were completely oxidized as a result of 12 hours exposure to highly active forms of oxygen. The density of the oxide passivation layer on the surface of the products increased significantly as a result of the formation of new bonds CHROMIUM -OXYGEN -CHROMIUM. This resulted in increased corrosion resistance. The rate of interaction with an alcohol solution containing halogen ions was reduced by 71% for the samples with the oxide passivation layer compared to samples of untreated X17 steel.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":"23 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140367231","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 TWO-PHASE FLOW ON THE FUEL GRAIN IGNITION AND ITS DEPARTURE FROM THE CARTRIDGE CASE 两相流对燃料颗粒点火及其偏离弹壳的影响

Eurasian Physical Technical Journal Pub Date : 2024-03-29 DOI: 10.31489/2024no1/84-92

L. L. Minkov

引用次数: 0

EW METAL/SUPERCONDUCTOR-INSULATOR TRANSITIONS AND THEIR EFFECTS ON HIGH-TCSUPERCONDUCTIVITY INUNDERDOPED AND OPTIMALLY DOPED CUPRATES 新的金属/超导体-绝缘体跃迁及其对低掺杂和最佳掺杂铜氧化物高超导性的影响

Eurasian Physical Technical Journal Pub Date : 2024-03-29 DOI: 10.31489/2024no1/21-27

U. Kurbanov

{"title":"EW METAL/SUPERCONDUCTOR-INSULATOR TRANSITIONS AND THEIR EFFECTS ON HIGH-TCSUPERCONDUCTIVITY INUNDERDOPED AND OPTIMALLY DOPED CUPRATES","authors":"U. Kurbanov","doi":"10.31489/2024no1/21-27","DOIUrl":"https://doi.org/10.31489/2024no1/21-27","url":null,"abstract":"Abstract.Anew approach to the metal/superconductor-insulator transition in doped cuprates by studying the polaron formation and localization of doped charge carriers (holes) in them and the possibility of transforming a metallic or superconducting system into an insulatorwas developed. Amore suitable criterion for such a phase transition by comparing the bandwidth (or Fermi energy) of large polarons with their binding energies in the cuprateswas derived. The possibility of the metal/superconductor-insulator transition and phase separation in doped cuprates resulting in the formation of competing metallic/superconducting and insulating phases in underdoped, optimally doped and even in overdoped high-Tccuprateswas predicted. Then the possible detrimental and beneficial effects of the different disorders (e.g. polaron formation and charge-density-wave transition) and the coexisting insulating and superconducting phases on the critical temperature 𝑇𝑐of the superconducting transition of underdoped and optimally doped cuprateswas examined. The actual superconducting transition temperature 𝑇𝑐in these materials using the theory of Bose-liquid superconductivity, and not theBardeen-Cooper-Schrieffer-like theory of Fermi-liquid superconductivity, which is incapable of predicting the relevant value of 𝑇𝑐in high-𝑇𝑐cuprateswas determined. We find thatthe suppressing of the polaronic and charge-density-waveeffects in optimally doped cuprates results in the enhancement of 𝑇𝑐, while some lattice defects (e.g., anion vacancies) in the cuprates may strongly affect, on 𝑇𝑐and enhance high-𝑇𝑐superconductivity in them.","PeriodicalId":11789,"journal":{"name":"Eurasian Physical Technical Journal","volume":"81 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140368919","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