Problems of Atomic Science and Technology最新文献_第7页

CONVECTION OF A VISCOUS INCOMPRESSIBLE COOLANT IN A HORIZONTAL CYLINDRICAL PIPE HEATED FROM BELOW. AN ANALYTICAL SOLUTION 粘性的不可压缩的冷却剂在从下面加热的水平圆柱形管道中的对流。解析解

Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-046

O.L. Andrieieva, K.V. Abelentseva, V.I. Tkachenko

引用次数: 0

CAVITATION EROSION RESISTANCE OF VACUUM-ARC COATINGS BASED ON TiN 锡基真空电弧涂层的抗空化侵蚀性能

Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-126

І.О. Klimenko, V.G. Marinin, V.А. Belous, N.A. Azarenkov, М.G. Ishchenko, V.S. Goltvyanytsya, A.S. Kuprin

{"title":"CAVITATION EROSION RESISTANCE OF VACUUM-ARC COATINGS BASED ON TiN","authors":"І.О. Klimenko, V.G. Marinin, V.А. Belous, N.A. Azarenkov, М.G. Ishchenko, V.S. Goltvyanytsya, A.S. Kuprin","doi":"10.46813/2023-147-126","DOIUrl":"https://doi.org/10.46813/2023-147-126","url":null,"abstract":"This review presents an examination of various studies investigating the impact of deposition process conditions and structural characteristics of TiN-based vacuum-arc coatings on their ability to withstand cavitation erosion in water. The structural and phase composition of TiN coatings is influenced by two key technological parameters: the nitrogen pressure in the vacuum chamber and the substrate bias potential. However, it has been observed that vacuum-arc alloy coatings such as TiSiN and TiAlYN exhibit notably lower resistance to cavitation erosion. Additionally, research on multilayer Ti-TiN coatings with varying numbers and thickness ratios of layers has not shown an improvement in resistance to cavitation wear when compared to single-layer coatings deposited under optimal conditions. On the other hand, single-phase stoichiometric TiN coatings deposited at a higher nitrogen pressure of 2 Pa and a bias potential of up to -300 V have demonstrated remarkable resistance to cavitation wear. These coatings could be effectively utilized to protect the titanium alloy Ti-6Al-4V against cavitation damage.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136013904","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 GAS IMPURITIES INFLUENCE ON THE CHARACTERISTICS OF VT1-0 AND VT6 TITANIUM ALLOYS 气体杂质对vt1-0和vt6钛合金性能的影响

Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-137

Serhii Polishko

引用次数: 0

MODIFIED STEFAN CONDITION IN STEFAN PROBLEM 修正了斯蒂芬问题中的斯蒂芬条件

Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-021

D.G. Bielykh, S.F. Skoromnaya, V.I. Tkachenko

引用次数: 0

HARDENING OF LIGHTWEIGHT MULTI-PRINCIPAL ELEMENT TITANIUM-BASED ALLOY UNDER AR ION IRRADIATION 氩离子辐照下轻量化多主元素钛基合金的硬化

Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-003

G. Tolstolutska, M. Tikhonovsky, О. Velikodny, S. Karpov, V. Ruzhytskyi, G. Tolmachova, R. Vasilenko

引用次数: 0

TECHNOLOGICAL BASIS OF THE PROCESS OF ZIRCONIUM AND HAFNIUM SEPARATION 锆铪分离工艺的技术基础

Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-103

A.P. Mukhachev, D.O. Yelatontsev, O.A. Kharytonova, V.G. Shevchenko

引用次数: 0

TEXTURAL AND STRUCTURAL REGULARITIES OF DEFORMATION BY ROLLING OF Zr-2.5%Nb ALLOY Zr-2.5%Nb合金轧制变形的织构和组织规律

Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-077

D.G. Malykhin, V.M. Grytsyna, K.V. Kovtun

{"title":"TEXTURAL AND STRUCTURAL REGULARITIES OF DEFORMATION BY ROLLING OF Zr-2.5%Nb ALLOY","authors":"D.G. Malykhin, V.M. Grytsyna, K.V. Kovtun","doi":"10.46813/2023-147-077","DOIUrl":"https://doi.org/10.46813/2023-147-077","url":null,"abstract":"A review of studies of regularities of changes in the crystallographic texture of the longitudinal and cross rolling of the Zr-2.5%Nb alloy is given. Accordingly with this, plates were made from longitudinal fragments and rings of a tube 15.01.5 mm from the fuel assemblies of Russian RBMK reactors. The plates were annealed at 580 °C for 3 h. X-ray studies of texture changes with the degree of deformation of the plates by rolling were carried out. The principle of method of inverse pole figures was used with the calculation of the Kearns texture coefficients, as well as measurements of tilt curves (0002) was. Non-uniformiity of deformation during straightening of the tube blanks was taken into account. It is found that the main rotations of crystallographic c-axes in the plates at any rolling direction are carried out in the plane corresponding to the cross-section of the original tube. Existence of an initial stage of increased textural changes during deformation of the plates is found, what is qualitatively and quantitatively related to activity of tensile twins of the {1012}[1011] system. Regularities in texture changes at the subsequent moderate stage of deformation with the participation of compression twins are considered. The purely twinning nature of the textural doublet, which latter is characteristic of the rolling texture of metals of the titanium subgroup, is explained. It is noted and explained a fact that during cross rolling of plates (made from tube rings), textural changes occur at a rate twice as high as during longitudinal rolling. As considered, all similar regularities can be carried out for the metals of the titanium subgroup.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136013913","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

REVIEW: INVESTIGATION OF PROCESSES OF DAMAGE TO THE HEAT TRANSFER TUBE OF WWER-1000 STEAM GENERATORS 回顾:wwer-1000蒸汽发生器传热管损坏过程的研究

Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-034

O.G. Rudenko, S.V. Gozhenko

引用次数: 0

SPECTRAL-LUMINESCENT AND ELECTROPHYSICAL STUDY OF RADIATION OXIDATION OF BERYLLIUM IN WATER 铍在水中辐射氧化的光谱发光和电物理研究

Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-030

N.N. Gadzhieva, S.Z. Melikova, F.N. Nurmammadova, Sh.N. Nasirov, F.G. Asadov, B.A. Mammadov

{"title":"SPECTRAL-LUMINESCENT AND ELECTROPHYSICAL STUDY OF RADIATION OXIDATION OF BERYLLIUM IN WATER","authors":"N.N. Gadzhieva, S.Z. Melikova, F.N. Nurmammadova, Sh.N. Nasirov, F.G. Asadov, B.A. Mammadov","doi":"10.46813/2023-147-030","DOIUrl":"https://doi.org/10.46813/2023-147-030","url":null,"abstract":"The radiation oxidation of Be in water at room temperature in the absorbed dose range Dγ = 0.5…180 kGy was studied by radiothermoluminescence (RTL), infrared reflection-adsorption spectroscopy (IRRAS), and electrical conductivity. The participation and role of surface relaxing intermediate-active particles in the dynamics of changes in the oxidation process are considered. Using the RTL method, the role of surface oxygen hole centers generated by γ-irradiation and chemisorbed oxygen in the formation of nanooxide films was experimentally established. The formation of nanooxide films on the surface of Be in water was traced in the IR reflection spectra. The kinetics of radiation oxidation of beryllium has been studied and its radiation passivation has been established. According to the logarithmic dose dependence of the surface resistivity Be, two stages of the oxidation process were revealed. It is shown that the formation of nano oxide films leads to a decrease in the surface electrical conductivity of beryllium by 2 orders of magnitude and an increase in the thickness of oxide films by 1.6 times.","PeriodicalId":54580,"journal":{"name":"Problems of Atomic Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136013917","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

ON THE POSSIBILITY OF COEXISTENCE OF DISLOCATION LOOPS OF DIFFERENT NATURE IN ZIRCONIA WITHIN THE FRAMEWORK OF CLASSICAL ELASTIC THEORY 经典弹性理论框架下氧化锆中不同性质位错环共存的可能性

Problems of Atomic Science and Technology Pub Date : 2023-10-12 DOI: 10.46813/2023-147-009

O.G. Trotsenko, A.V. Babich, P.M. Ostapchuk

引用次数: 0