Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques最新文献_第5页

X-Ray Studies of Fe–NiCr Nanocomposites Produced in Underwater Low-Temperature Plasma

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-03-17 DOI: 10.1134/S1027451024702082

M. N. Shipko, A. V. Agafonov, M. A. Stepovich, A. V. Khlyustova, N. A. Sirotkin, A. A. Viryus

{"title":"X-Ray Studies of Fe–NiCr Nanocomposites Produced in Underwater Low-Temperature Plasma","authors":"M. N. Shipko, A. V. Agafonov, M. A. Stepovich, A. V. Khlyustova, N. A. Sirotkin, A. A. Viryus","doi":"10.1134/S1027451024702082","DOIUrl":"10.1134/S1027451024702082","url":null,"abstract":"Fe–NiCr composites obtained in underwater low-temperature plasma excited between two metal electrodes Fe and NiCr in a volume of distilled water were studied using X-ray diffractometry and X-ray microanalysis. It was found that an increase in the discharge plasma current did not significantly affect the cathode sputtering rate but significantly affected the anode sputtering rate. The X-ray diffraction patterns of all synthesized samples contained reflections related to the layered structure. The synthesized products were not single-phase but were a mixture of iron, nickel, and chromium oxides. It was shown that low-temperature underwater plasma is an effective tool for the synthesis of nanocomposites based on metal oxides, the precursors of which are metal electrodes. The results obtained indicate the possibility of the formation of various modifications of iron oxides under underwater plasma conditions with partial replacement of iron ions by other ions with crystal-chemical properties close to those of iron, which can affect the electromagnetic properties of powder nanoparticles.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"18 1 supplement","pages":"S213 - S219"},"PeriodicalIF":0.5,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638085","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 Studies of the “Nitride Coating/Silumin Substrate” System after Pulsed Electron Beam Treatment

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-03-17 DOI: 10.1134/S102745102470191X

O. V. Krysina, Yu. F. Ivanov, N. A. Prokopenko, A. D. Teresov, P. V. Moskvin, E. A. Petrikova, O. S. Tolkachev

{"title":"Structural Studies of the “Nitride Coating/Silumin Substrate” System after Pulsed Electron Beam Treatment","authors":"O. V. Krysina, Yu. F. Ivanov, N. A. Prokopenko, A. D. Teresov, P. V. Moskvin, E. A. Petrikova, O. S. Tolkachev","doi":"10.1134/S102745102470191X","DOIUrl":"10.1134/S102745102470191X","url":null,"abstract":"The work is aimed to study the features of the formation of the surface layer of samples after combined treatment, including vacuum-arc deposition of titanium nitride coatings on silumin of eutectic composition and subsequent treatment of the “nitride coating/silumin substrate” system with a pulsed electron beam of submillisecond duration. Detailed studies of samples treated with an electron beam according to optimal modes were carried out by the transmission electron microscopy methods. Peculiarities of the structure and phase composition of the system were revealed depending on the electron beam processing mode. The treatment according to the optimal electron beam treatment modes to obtain the surface layer of the “TiN coating/silumin substrate” system with high wear resistance, adhesion and hardness does not exceed the temperature of 1150°C and does not lead to destruction of the coating according to TEM analysis results. The coating consists of nanosized TiN and Ti2N crystallites, which are combined into columns with subnanometer transverse dimensions. The electron beam treatment of the “TiN coating/silumin substrate” system leads to the formation of a cellular crystallization structure, where aluminum-based cells are separated from each other by silicon-based particles with nano-sized dimensions. The system has high properties: hardness HV ≈ 2 GPa, wear parameter ≈1 × 10–4 mm3 N–1 m–1 and high adhesion strength (L > 2.5 N).","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"18 1 supplement","pages":"S91 - S99"},"PeriodicalIF":0.5,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638376","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 Experiment on Small-Angle Scattering for Solid Nanospheres Using Pulsed Neutron Sources

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-03-17 DOI: 10.1134/S1027451024701799

K. A. Pavlov, N. A. Kovalenko, A. I. Ivankov, A. I. Kuklin, S. V. Grigoriev

引用次数: 0

Modeling of Heat and Mass Transfer in the Laser-Plasma Method of Direct Powder Deposition 激光-等离子体直接粉末沉积法中的传热和传质建模

IF 0.5

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-03-17 DOI: 10.1134/S1027451024701933

D. V. Bedenko, O. B. Kovalev

{"title":"Modeling of Heat and Mass Transfer in the Laser-Plasma Method of Direct Powder Deposition","authors":"D. V. Bedenko, O. B. Kovalev","doi":"10.1134/S1027451024701933","DOIUrl":"10.1134/S1027451024701933","url":null,"abstract":"For the direct laser-plasma powder cladding method, the temperature distributions and surface profiles of deposited layers from a steel micro powder on the flat sample are numerically investigated. The deposition is performed using various scanning strategies of the laser system—with oscillations in a sinusoidal curve, circular, elliptical or figure-eight trajectories with constant linear motion, for both single and multi-layer beads. Numerical modeling of the problem is carried out taking into account the heat and mass transfer processes in a region containing moving curvilinear boundaries occurring during the gas-jet feed of powder particles into the melt pool created by laser-plasma action. Effective trajectories and frequencies of the periodical oscillations of the laser beam were discovered, at which the amount of cladded powder is maximal, and the resulting beads have a smooth symmetrical shape. It’s shown that this occurs due to flexible and precise control of the melt pool size and shape, when it best corresponds to the profile of the powder particles flow. As the result, the model allows determining the optimal regimes of laser-plasma cladding, ensuring the highest powder utilization coefficient and the absence of excessive substrate overheating, simultaneously.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"18 1 supplement","pages":"S106 - S113"},"PeriodicalIF":0.5,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638541","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

X-ray Multilens Interferometer based on Silicon Refractive Lenses for Diagnostic of the Coherent Properties of Radiation 基于硅折射透镜的 X 射线多透镜干涉仪，用于诊断辐射的相干特性

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-03-17 DOI: 10.1134/S1027451024701854

D. Zverev, M. Sorokovikov, V. Yunkin, S. Kuznetsov, A. Snigirev

引用次数: 0

The Influence of Charged Conductive Atomic-Force Microscope Tip on Regimes of Electronic Transport in Diffusive Doped InAs Nanowire 带电导电原子力显微镜针尖对扩散掺杂砷化镓纳米线电子传输机制的影响

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-03-17 DOI: 10.1134/S102745102470188X

A. A. Zhukov

引用次数: 0

On the Application of Bardeen–Cooper–Schrieffer Equations in Studies of the Pairing Mechanism in Iron Pnictides

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-03-17 DOI: 10.1134/S1027451024702112

A. E. Karakozov, M. V. Magnitskaya

{"title":"On the Application of Bardeen–Cooper–Schrieffer Equations in Studies of the Pairing Mechanism in Iron Pnictides","authors":"A. E. Karakozov, M. V. Magnitskaya","doi":"10.1134/S1027451024702112","DOIUrl":"10.1134/S1027451024702112","url":null,"abstract":"The application of multiband Bardeen–Cooper–Schrieffer equations with semiempirical strong pairing corrections to determine the intraband and interband interaction constants of coupling in multiband superconductors from experimental data is considered. Using the example of the multiband superconductor MgB2, it is shown that the inversion of such equations with the experimentally known ratios of the superconducting gaps in the σ and π bands of Δσ(0)/Δπ(0) at temperatures of T → 0 and 2Δσ(0)/Tc (where Tc is the critical temperature of the transition to the superconducting state) as parameters makes it possible to reproduce the coupling constants in MgB2 that are calculated ab initio with very good accuracy. Similar equations for two- and three-band iron pnictides with interband spin-fluctuation interaction are obtained and their features are considered. Such equations with experimental parameters represent a simple system of two (or three) algebraic equations. The solutions of the system of equations with experimentally found Δi(0)/Δj(0), 2Δj(0)/Tc, the electron-gap anisotropy coefficient η, and the density-of-state ratios γi/γj in the bands completely determine the coupling constants in the phonon and nonphonon channels and the degree of correlation of the spin and charge degrees of freedom of spin-fluctuation excitations. All the parameters necessary for calculating the intraband and interband interaction constants can be obtained, for example, from studies using tunneling spectroscopy.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"18 1 supplement","pages":"S231 - S238"},"PeriodicalIF":0.5,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638099","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-Phase State and Morphology of a Composite Based on Magnesium Hydride and Magnesium Oxide Fabricated by Electric Arc Sputtering

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-03-17 DOI: 10.1134/S1027451024702161

V. N. Kudiarov, K. I. Busuek, D. V. Smovzh, S. Z. Sakhapov

{"title":"Structural-Phase State and Morphology of a Composite Based on Magnesium Hydride and Magnesium Oxide Fabricated by Electric Arc Sputtering","authors":"V. N. Kudiarov, K. I. Busuek, D. V. Smovzh, S. Z. Sakhapov","doi":"10.1134/S1027451024702161","DOIUrl":"10.1134/S1027451024702161","url":null,"abstract":"This study investigates the effect of magnesium oxide, which is synthesized for the first time through electric arc sputtering, on the desorption temperature and activation energy of hydrogen from a composite based on magnesium hydride. Scanning electron microscopy determines the average particle size of the composite to be 297 nm, which is 33 times smaller than the particle size of magnesium hydride powder obtained under the same mechanical-synthesis parameters in a planetary ball mill. X-ray phase analysis does not reveal any additional phases in the synthesized sample, which confirms there is no catalytic adsorption or desorption reactions of hydrogen during the mechanical synthesis of magnesium hydride with the addition of magnesium oxide. The method of thermally stimulated desorption reveals a decrease in the peak desorption temperature of hydrogen from a composite based on magnesium oxide and magnesium hydride, compared to pure milled MgH2, by 107, 124, and 127°C at heating rates of 8, 6, and 4°C/min, respectively. The activation energy for hydrogen desorption from the composite was 72 ± 1 kJ/mol, which is 82 kJ/mol lower than the activation energy for hydrogen desorption from magnesium hydride. This result confirms the positive effect of the noncatalytic additive on the kinetics of hydrogen desorption from magnesium hydride.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"18 1 supplement","pages":"S269 - S274"},"PeriodicalIF":0.5,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143638143","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 Application of Oxynitride Thin Films in Biomedicine

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-03-17 DOI: 10.1134/S1027451024702008

V. S. Filimonova, S. Y. Karelin, L. A. Krasnobaeva, S. V. Gusakova, E. V. Lisichko, N. N. Nikitenkov, V. S. Sypchenko

引用次数: 0

On Si/NiSi2/Si(111) Heterostructures Obtained by Solid-Phase Deposition

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-03-01 DOI: 10.1134/S1027451024701337

N. M. Mustafoeva, A. K. Tashatov, B. E. Umirzakov, M. B. Mamatova

引用次数: 0