Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques最新文献_第4页

Synthesis of Fullerenes C60 and C70 富勒烯C60和C70的合成

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-25 DOI: 10.1134/S1027451025700971

D. N. Borisenko

引用次数: 0

The Effect of Irradiation with a High-Power Ion Beam on Atmospheric Oxidation of Polycrystalline Magnesium 高能离子束辐照对多晶镁大气氧化的影响

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700648

T. V. Panova, V. S. Kovivchak

{"title":"The Effect of Irradiation with a High-Power Ion Beam on Atmospheric Oxidation of Polycrystalline Magnesium","authors":"T. V. Panova, V. S. Kovivchak","doi":"10.1134/S1027451025700648","DOIUrl":"10.1134/S1027451025700648","url":null,"abstract":"Studies have been carried out of the influence of a high-power ion beam of nanosecond duration on the atmospheric oxidation of polycrystalline magnesium. A decrease in the magnesium oxide phase was detected with increasing beam current density, which is probably due to the intensification of the processes of gas-dynamic expansion of the surface. Subsequent exposure of unirradiated and irradiated samples to a high-power ion beam at a temperature of 240°C in air led to a slowdown in the growth of the oxide phase in the irradiated samples. In this case, the greatest effect was observed for samples irradiated by a beam with a current density of 150 A/cm2. The role of chemical processes, mechanical stresses, and structural changes occurring in the beam-modified zone and influencing the oxidation process is discussed. The observed nonmonotonic dependences of the ratios of oxygen and carbon concentrations to magnesium for different heating times are explained by the formation of not only magnesium oxide but also probably magnesium hydroxide and carbonate. It has been shown that the effect of increasing the oxidation resistance of magnesium irradiated with a high-power ion beam can also be influenced by an increase in the concentration of carbon during its penetration into the surface layer.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 2","pages":"437 - 442"},"PeriodicalIF":0.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021550","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 Use of Underwater Plasma and Magnetic Pulse Treatment of FeSiBNb Ribbon Amorphous Alloys 水下等离子体和磁脉冲处理FeSiBNb带状非晶合金的研究

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700491

M. N. Shipko, M. A. Stepovich, A. V. Khlyustova, N. A. Sirotkin, T. P. Kaminskaya, A. V. Stulov, E. S. Savchenko

{"title":"On the Use of Underwater Plasma and Magnetic Pulse Treatment of FeSiBNb Ribbon Amorphous Alloys","authors":"M. N. Shipko, M. A. Stepovich, A. V. Khlyustova, N. A. Sirotkin, T. P. Kaminskaya, A. V. Stulov, E. S. Savchenko","doi":"10.1134/S1027451025700491","DOIUrl":"10.1134/S1027451025700491","url":null,"abstract":"Using scanning electron, optical, and scanning probe microscopy, the surface structure of unannealed amorphous electrical engineering alloys—foils with the composition Fe73(SiBNb)27 and alloys of the same composition with the addition of 1% Cu, obtained by ultrafast cooling via melt spinning onto a rotating copper drum—was studied. On the free surfaces of the foils not in contact with the rotating drum, microformations and irregularities in the form of “micropoints” with characteristic sizes below 0.5 μm were found; these may, during the operation of electrical products, initiate electric field gradients on the foil surface. Exposure to underwater plasma did not lead to any change in the magnetic properties of the studied materials. In the Fe73(SiBNb)27 foil with the addition of 1% Cu, treated with 10 and 40 pulses of a low-frequency (10–20 Hz), weak magnetic field (10–100 kA/m), magnetic contrast was observed: in phase contrast mode, exposure to 40 magnetic field pulses produced triangular features associated with the formation of closing prismatic domains, whose domain wall width is approximately 1–2 μm; after exposure to 10 magnetic field pulses, a specific magnetic contrast pattern was observed over the entire studied foil area. A weak dependence of specific magnetization on the number of magnetic pulses was also observed for the Fe73(SiBNb)27 foil with 1% Cu: increasing the number of pulses led to a slight decrease in specific magnetization.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 2","pages":"339 - 344"},"PeriodicalIF":0.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021757","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

Change in the Free Volume in Amorphous Al88Ni10Y2 Alloy under Plastic Deformation 塑性变形下非晶态Al88Ni10Y2合金自由体积的变化

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700739

V. V. Chirkova, N. A. Volkov, G. E. Abrosimova, A. S. Aronin

{"title":"Change in the Free Volume in Amorphous Al88Ni10Y2 Alloy under Plastic Deformation","authors":"V. V. Chirkova, N. A. Volkov, G. E. Abrosimova, A. S. Aronin","doi":"10.1134/S1027451025700739","DOIUrl":"10.1134/S1027451025700739","url":null,"abstract":"The surface morphology and structure of the amorphous Al88Ni10Y2 alloy subjected to deformation by multiple cold rolling were studied using X-ray diffraction and scanning electron microscopy. It was shown that during plastic deformation, steps are formed on the surface of the amorphous alloy due to the emergence of shear bands on the surface. It was found that aluminum crystals are formed in the deformed alloy. The steps on the surface of the deformed alloy were analyzed using the images obtained by the scanning electron microscopy method. It was shown that the length of the steps remains approximately the same when examining the surface of different areas of the deformed alloy. An assessment was made of the change in the fraction of free volume in the studied alloy during plastic deformation. The applied methodology made it possible to assess the difference in the density of undeformed and deformed alloys of different compositions using electron microscopic images. Determining the change in free volume content in amorphous alloys subjected to plastic deformation is a key factor in studying the ways of forming amorphous-nanocrystalline structures with improved mechanical properties.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 2","pages":"491 - 496"},"PeriodicalIF":0.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021762","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

Method for Modeling Free Molecular Flow in the Presence of Particle Sources Inside the Computational Domain 计算域中存在粒子源时自由分子流动的建模方法

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700569

S. V. Gordeev, S. V. Kanev, G. A. Popov, S. A. Khartov

{"title":"Method for Modeling Free Molecular Flow in the Presence of Particle Sources Inside the Computational Domain","authors":"S. V. Gordeev, S. V. Kanev, G. A. Popov, S. A. Khartov","doi":"10.1134/S1027451025700569","DOIUrl":"10.1134/S1027451025700569","url":null,"abstract":"A method for modeling free molecular flow in the presence of particle sources in the calculation domain is proposed. It can be used to model processes in the ionization chamber of a radio-frequency ion thruster or an ion source using molecular propellants that dissociate in a discharge. The method can also be used to calculate the parameters of the neutral plasma component in the ionization chamber of a radio-frequency ion thruster operating on ambient atmospheric gases. The approach is based on the boundary element method. The mathematical model does not take into account various excited states of atoms and molecules. It is assumed that the calculation domain contains neutral atoms and molecules, atomic and molecular ions of the propellant, and electrons. The propellant is fed into the ionization chamber in molecular form, and atoms are formed through interactions of the molecules with electrons in the discharge. It is shown that the presence of particle sources in the computational domain can be used as a boundary condition determining the particle flux incident on each element. An approximate method for estimating the effect of ionization and dissociation on neutral particle flows in the computational domain is described. Using the developed method, it is possible to obtain distributions of the concentrations of atoms and molecules arising from dissociation in radio-frequency low-pressure gas discharges. The method is verified by comparing the results of a test calculation of a nitrogen-fed RIT-10 thruster with published results of experimental studies. In most of the studied parameter range, the discrepancies between the calculated and experimental results were less than 20%.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 2","pages":"382 - 389"},"PeriodicalIF":0.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021581","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 Ba-Doped BiFeO3 Nanoparticles ba掺杂BiFeO3纳米颗粒的光催化活性

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700703

R. R. Gyulakhmedov, F. F. Orudzhev, A. N. Khrustalev, D. S. Sobola, M. G. Abdurakhmanov, Sh. P. Faradzhev, A. E. Muslimov, V. M. Kanevsky, M. Kh. Rabadanov, N.-M. R. Alikhanov

{"title":"Photocatalytic Activity of Ba-Doped BiFeO3 Nanoparticles","authors":"R. R. Gyulakhmedov, F. F. Orudzhev, A. N. Khrustalev, D. S. Sobola, M. G. Abdurakhmanov, Sh. P. Faradzhev, A. E. Muslimov, V. M. Kanevsky, M. Kh. Rabadanov, N.-M. R. Alikhanov","doi":"10.1134/S1027451025700703","DOIUrl":"10.1134/S1027451025700703","url":null,"abstract":"In this work, nanopowders of the Bi1 − xBaxFeO3 system (x = 0, 0.10, 0.20) were synthesized by the combustion method of nitrate-organic precursors. The effect of doping bismuth ferrite (BiFeO3) with barium (Ba) ions on the morphology, crystal structure, and photocatalytic activity of the material was studied. X-ray diffraction analysis showed that all samples crystallize into a rhombohedrally distorted perovskite structure with the R3c space group. Doping with barium led to a significant decrease in the crystallite sizes, as well as to a distortion of the crystal lattice. In the case of 20% substitution, the formation of BaCO3 impurity was observed, which was also confirmed by the analysis of the Raman spectra. It was shown that the introduction of barium leads to the formation of a more porous texture and a significant increase in the specific surface area of the material. The original BiFeO3 demonstrated an extremely low efficiency of methylene blue decomposition relative to photolysis, while doping with barium led to a significant improvement in the photocatalytic characteristics of the material: in the case of 20% Ba substitution, the decomposition of methylene blue reached 99% in 1 h.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 2","pages":"470 - 480"},"PeriodicalIF":0.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021551","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

Two Channels of Minority Charge Carriers Recombination in a Homogeneous Semiconductor Target 均匀半导体靶中少数载流子复合的两个通道

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700624

E. V. Seregina, M. A. Stepovich, M. N. Filippov

{"title":"Two Channels of Minority Charge Carriers Recombination in a Homogeneous Semiconductor Target","authors":"E. V. Seregina, M. A. Stepovich, M. N. Filippov","doi":"10.1134/S1027451025700624","DOIUrl":"10.1134/S1027451025700624","url":null,"abstract":"The process of nonstationary diffusion of nonequilibrium minority charge carriers, which is realized after the termination of the effect of an electron probe on a homogeneous semiconductor target, is considered by mathematical modeling methods. For a low-energy (up to 10 keV) electron probe, a mathematical model of two-dimensional diffusion of charge carriers in a homogeneous semiconductor material is proposed, taking into account the dynamics of changes in target temperature after the termination of electron irradiation of the probe. When calculating the dependence of the density of nonequilibrium minority charge carriers generated by an electron probe on the coordinates, a mathematical model of energy loss by primary electrons was used, taking into account the separate contribution of electrons that experienced small-angle scattering and absorbed into the target and the contribution of backscattered electrons that experienced a small number of scattering at large angles and left the target. The differential equation of thermal conductivity is solved approximately using the projection method. The quantitative description of the temperature dependences of the effective lifetime and the diffusion coefficient of the generated charge carriers was carried out taking into account the available results of experimental electron probe studies of cathodoluminescence of homogeneous monocrystalline gallium nitride. Model calculations have been performed for the diffusion of excitons in homogeneous monocrystalline gallium nitride in the presence of two independent recombination channels of nonequilibrium charge carriers.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 2","pages":"427 - 432"},"PeriodicalIF":0.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021734","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

Structural Analysis of Brazilian Graphite by X-ray Diffraction, Scanning Electron Microscopy, and Thermogravimetric Analysis with Simultaneous Differential Scanning Calorimetry 用x射线衍射、扫描电子显微镜和热重分析同时差示扫描量热法分析巴西石墨结构

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700594

M. V. Soloninkina, D. V. Loginov, S. A. Moshkalev, N. N. Rozhkova

{"title":"Structural Analysis of Brazilian Graphite by X-ray Diffraction, Scanning Electron Microscopy, and Thermogravimetric Analysis with Simultaneous Differential Scanning Calorimetry","authors":"M. V. Soloninkina, D. V. Loginov, S. A. Moshkalev, N. N. Rozhkova","doi":"10.1134/S1027451025700594","DOIUrl":"10.1134/S1027451025700594","url":null,"abstract":"The results on X-ray analysis of Brazilian graphite sample are presented. During diffraction pattern indexing and qualitative X-ray phase analysis, it has been found that Brazilian graphite contains three phases of carbon, two of which belong to hexagonal graphite (α-graphite) and one to rhombohedral graphite (β‑graphite), which is confirmed by simultaneous thermal analysis. The unit cell parameters of each phase have been determined and refined. Calculations of conditional phase concentrations in the sample by the least squares method have shown that the conditional concentration of 47-1155 standard (JCPDS database) in the sample is 66%, 1-646 standard is 21.3%, and 2-456 standard is 12.6%. Using scanning electron microscopy, the sample surface topology has been found to be is a flake structure with a large number of particles, the size of which does not exceed 5 μm. The quantitative characteristics of the short-range order have been determined, which have shown that the structure of Brazilian graphite is close to that of hexagonal graphite within the error limits.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 2","pages":"405 - 412"},"PeriodicalIF":0.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021555","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 UV and Visible Radiation on Optical Properties of Coatings Based on Two-Layer Hollow Particles of Silicon Dioxide and Zinc Oxide 紫外和可见光辐射对二氧化硅和氧化锌双层中空颗粒涂层光学性能的影响

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S1027451025700442

D. S. Fedosov, V. V. Neshchimenko, M. M. Mikhailov, S. A. Yuryev

{"title":"Influence of UV and Visible Radiation on Optical Properties of Coatings Based on Two-Layer Hollow Particles of Silicon Dioxide and Zinc Oxide","authors":"D. S. Fedosov, V. V. Neshchimenko, M. M. Mikhailov, S. A. Yuryev","doi":"10.1134/S1027451025700442","DOIUrl":"10.1134/S1027451025700442","url":null,"abstract":"A comparative analysis of in situ diffuse reflection spectra in the range from 200 to 2500 nm and their changes after irradiation of coatings based on polymethylphenylsiloxane resin and pigment powders of two-layer hollow particles ZnO/SiO2 and SiO2/ZnO was carried out. Irradiation was performed with light from a xenon arc lamp simulating the solar radiation spectrum, with an intensity of 3 e.s.i. (equivalent of solar irradiance, 1 e.s.i. = 0.139 W/cm2). The photostability of the studied coatings based on two-layer hollow ZnO/SiO2 and SiO2/ZnO particles was estimated relative to coatings based on ZnO polycrystals from an analysis of the difference diffuse reflection spectra obtained by subtracting the spectra of unirradiated and irradiated samples. It has been found that the intensity of the induced absorption bands in coatings based on ZnO/SiO2 and SiO2/ZnO hollow particles is lower than that in coatings based on ZnO microparticles and the radiation resistance when assessing changes in solar absorptance (ΔαS) is twice as high. The increase in photostability is probably determined by the different nature of defect accumulation: for bulk microparticles, radiation defects can accumulate inside the grains, while in hollow particles, the accumulation of defects can occur only within the thin shell of the sphere.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 2","pages":"314 - 319"},"PeriodicalIF":0.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021715","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

Modeling of Damage along the Tracks of Swift Heavy Ions in Polyethylene 聚乙烯中快速重离子轨迹损伤的建模

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-10 DOI: 10.1134/S102745102570065X

P. A. Babaev, R. A. Voronkov, A. E. Volkov

{"title":"Modeling of Damage along the Tracks of Swift Heavy Ions in Polyethylene","authors":"P. A. Babaev, R. A. Voronkov, A. E. Volkov","doi":"10.1134/S102745102570065X","DOIUrl":"10.1134/S102745102570065X","url":null,"abstract":"The results of atomic-level modeling of damage formation along the whole trajectory of swift heavy ions, stopping in the electronic energy loss mode in polyethylene are presented. Theoretical models could significantly improve the understanding of track formation in polymers, but their main disadvantage is an insufficient level of detail. In this paper, this problem is solved by using a multiscale hybrid approach: the Monte–Carlo TREKIS program describes the excitation of an electronic system of a target; the reactive molecular dynamics of the response of an atomic system to an ion-induced perturbation within the framework of the LAMMPS program allows to trace the damage up to the time of complete cooling of the track. Detailed tracing of the coupled electronic and atomic kinetics has shown that the damage maxima are spatially separated by at least 10 μm from the maxima of energy released by the ions. The differences occur due to the dependence of the initial spectra of electrons generated near the ion trajectory on the ion energy. The effects demonstrated should be the same for all polymers and may be critical for the effective operation of devices and detectors containing thin polymer films irradiated with swift heavy ions.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 2","pages":"443 - 449"},"PeriodicalIF":0.4,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145021717","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