Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques最新文献_第3页

Modeling the Process of Deposition of Erosion Products on the Walls of the Gas-Discharge Chamber of an Ion Thruster 离子推力器气体放电室壁面侵蚀产物沉积过程的建模

IF 0.4

Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-25 DOI: 10.1134/S1027451025701113

M. V. Cherkasova

{"title":"Modeling the Process of Deposition of Erosion Products on the Walls of the Gas-Discharge Chamber of an Ion Thruster","authors":"M. V. Cherkasova","doi":"10.1134/S1027451025701113","DOIUrl":"10.1134/S1027451025701113","url":null,"abstract":"The problem of contamination of the inner surface of the gas-discharge chamber of a high-frequency ion thruster with sputtered material of the accelerating electrode is considered. A physical and mathematical model of electrode surface sputtering by secondary ions is formulated using the sputtering indicatrix. The motion of sputtered atoms through the flow of primary beam particles is considered, and the conditions for the penetration of sputtered material into the plasma of the gas-discharge chamber are determined. The motion of impurity atoms through the gas-discharge plasma is considered taking into account the possibility of impurity ionization. It is also assumed that all impurity atoms reaching the chamber surface are condensed. Numerical modeling of surface contamination for a spherical gas-discharge chamber using carbon and titanium as the material of the accelerating electrode of the ion-optical system is performed, regardless to the chamber material. The angular distribution of particles penetrating the chamber is obtained, and the maximum velocity and localization of particle deposition on the surface of the gas-discharge chamber are estimated. The results are in satisfactory agreement with published experimental data.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 3","pages":"771 - 782"},"PeriodicalIF":0.4,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135186","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 Determination of Diffusion Coefficient of an Inclusion Attached to a Fixed Dislocation Using Its Thermal Motion 用固定位错的热运动确定夹杂物的扩散系数

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-25 DOI: 10.1134/S1027451025700922

S. I. Prokofjev

{"title":"On Determination of Diffusion Coefficient of an Inclusion Attached to a Fixed Dislocation Using Its Thermal Motion","authors":"S. I. Prokofjev","doi":"10.1134/S1027451025700922","DOIUrl":"10.1134/S1027451025700922","url":null,"abstract":"In situ transmission electron microscopy observations showed that one or more liquid Pb nanoinclusions attached to a fixed dislocation segment in an Al matrix exhibit quasi-one-dimensional thermal motion localized near the dislocation line as fixed segments are traps for the nanoinclusions. The use of longitudinal component of the trajectories of their thermal motion makes it possible to determine the diffusion coefficients of individual nanoinclusions in a wide range of temperatures and sizes. To determine the diffusion coefficients, the root-mean-square displacement of a one-dimensional Brownian oscillator under the action of a linear restoring force as a function of movement time, obtained by M. von Smoluchowski, was used. However, this expression does not quite correctly describe the thermal motion of inclusion attached to a dislocation segment fixed at its ends as this expression does not take into account the deceleration of inclusion near its fixed ends that leads to underestimation of the value of the diffusion coefficient of the inclusion. In the present paper, this equation is modified. The application of the modified equation demonstrated that it described the behavior of experimental dependences of a root mean squared displacement of liquid Pb nanoinclusions attached to fixed dislocation segments in an Al matrix on the movement time quite better than the equation used before. This made it possible to significantly increase the accuracy of determination of the diffusion coefficients of the nanoinclusions.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 3","pages":"627 - 632"},"PeriodicalIF":0.4,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135000","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 Clustering in Real Cottrell Nanosegregations in Metallic Materials 金属材料中真实cottell纳米分离的聚类研究

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-25 DOI: 10.1134/S1027451025700880

Yu. S. Nechaev, N. A. Shurygina, A. O. Cheretaeva, V. P. Filippova

{"title":"On Clustering in Real Cottrell Nanosegregations in Metallic Materials","authors":"Yu. S. Nechaev, N. A. Shurygina, A. O. Cheretaeva, V. P. Filippova","doi":"10.1134/S1027451025700880","DOIUrl":"10.1134/S1027451025700880","url":null,"abstract":"By analyzing some known data of 3D atomic force microscopy for metallic materials and a number of other theoretical and experimental results, including data on the dislocation dissolution of cementite in pearlitic and martensitic steels, clustering in real Cottrell atmospheres (nanosegregations) is considered and their characteristics, including the number of impurity atoms per dislocation of atomic length, are determined, which differ significantly from those corresponding to classical theoretical models. In particular, Cottrell boron nanosegregations on edge dislocations in an ordered intermetallic compound FeAl containing 40 at % Al and 0.04 at % B, as well as Cottrell carbon nanosegregations on screw dislocations in martensitic steel, are examined. The presence of Fe3B- and Fe3C-type clustering in such nanosegregations, which is not taken into account in the framework of the classical models of Cottrell atmospheres (clouds), is shown. It is shown that in metallic materials (FeAl–B, Fe–C, Al–Fe, Pd–H) in real atmospheres (nanosegregations) on dislocations a certain clustering takes place (including the formation of boride-like, carbide-like, intermetallic-like, and hydride-like structures), which differs from that of the classical theoretical models of Cottrell atmospheres. In particular, the methodology for determining the impurity diffusion coefficient in the areas of nanosegregations on dislocations in metallic materials is considered using Pd–H, Al–Fe, and Fe–C systems as an example.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 3","pages":"598 - 604"},"PeriodicalIF":0.4,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135061","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

Characterization of Parent Austenite of Martensitic and Bainitic Steels Based on Their Texture Developed during Phase Transformation 基于相变织构的马氏体和贝氏体钢母奥氏体表征

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-25 DOI: 10.1134/S1027451025700879

A. A. Zisman, N. Y. Zolotorevsky, A. N. Matvienko, S. N. Petrov

{"title":"Characterization of Parent Austenite of Martensitic and Bainitic Steels Based on Their Texture Developed during Phase Transformation","authors":"A. A. Zisman, N. Y. Zolotorevsky, A. N. Matvienko, S. N. Petrov","doi":"10.1134/S1027451025700879","DOIUrl":"10.1134/S1027451025700879","url":null,"abstract":"The crystallographic texture of bainitic and martensitic steels determined at room temperature is related to the texture of the prior austenite owing to the orientation relationship between the parent and daughter phases. This allows, in particular, to judge about the deformation or recrystallization of austenite. It becomes possible to analyze the effect of hot rolling on the austenite structural state, which precedes quenching. The structures and textures of bainitic and martensitic steels have been analyzed using electron backscatter diffraction. In the case of single-pass rolling, the state of prior austenite can be estimated based on the morphology of austenite grains reconstructed on the basis of the electron diffraction data. In the case of multi-pass hot rolling, which proceeds with a gradual decrease in temperature, such an estimate is difficult due to peculiarities of structure development. At the same time, this can be performed based on of the analysis of crystallographic texture of steel. As a quantitative characteristic of the structural state of austenite, a scalar parameter is proposed that depends on the relative intensity of texture components formed during the phase transformation.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 3","pages":"590 - 597"},"PeriodicalIF":0.4,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135132","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

Features of the Morphology and Composition of Stones in the Human Body in the Study of the Mechanisms of Their Formation 人体结石的形态和组成特征及其形成机制的研究

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-25 DOI: 10.1134/S1027451025700946

D. A. Zolotov, I. G. Dyachkova, V. E. Asadchikov, K. A. Prusakov, D. V. Basmanov, D. N. Khmelenin, O. M. Zhigalina, V. V. Labis

引用次数: 0

Rotating Water-Jet-Cooled Target for Compact Neutron Source 紧凑中子源旋转水冷靶

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-25 DOI: 10.1134/S1027451025700843

P. V. Shvets, P. A. Prokopovich, E. I. Fatyanov, S. F. Sidorkin, A. Yu. Goihman

引用次数: 0

Control of the Plate Movement in Extreme Ultraviolet Scanners Based on Optimal Performance Algorithms 基于最优性能算法的极紫外扫描仪中板块运动控制

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-25 DOI: 10.1134/S1027451025701009

E. V. Petrakov, D. V. Balandin

引用次数: 0

Hydride Phases Based on High-Entropy Alloys TiZrTaV(Mo1 – xNbx) and TiZrTaNb(Mo1 – xNix), x = 0.2, 0.4, 0.6, and 0.8 基于高熵合金TiZrTaV（Mo1 - xNbx）和TiZrTaNb（Mo1 - xNix）的氢化物相，x = 0.2, 0.4, 0.6和0.8

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-25 DOI: 10.1134/S1027451025701071

S. A. Lushnikov, T. V. Filippova, S. V. Mitrokhin

引用次数: 0

Study of the Possibility of Increasing the Thrust Efficiency and Service Life of Stationary Plasma Thrusters Operating on Krypton 在氪星上运行的固定式等离子体推进器提高推力效率和使用寿命的可能性研究

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-25 DOI: 10.1134/S1027451025701083

R. V. Akhmetzhanov, V. P. Kim, E. A. Shilov

{"title":"Study of the Possibility of Increasing the Thrust Efficiency and Service Life of Stationary Plasma Thrusters Operating on Krypton","authors":"R. V. Akhmetzhanov, V. P. Kim, E. A. Shilov","doi":"10.1134/S1027451025701083","DOIUrl":"10.1134/S1027451025701083","url":null,"abstract":"The problems arising in the development of stationary plasma thrusters operating on krypton, which is an alternative to the traditional working substance for these thrusters, xenon, are analyzed. The basic physical concepts and research results that determined the development of stationary plasma thrusters operating on xenon are considered. It is shown that they can also be used in the development of thrusters operating on krypton taking into account its features as a working substance. One of the main features is the need to operate at increased krypton flow densities and discharge power in the acceleration channel. This leads to an increase in the flows of accelerated ions on the structural elements of the thruster and the rate of their erosion, and reduces the thrust efficiency and service life of the thruster. A review of studies carried out at the Research Institute of Applied Mechanics and Electrodynamics, Moscow Aviation Institute, on the possibility of reducing ion flows on the walls of the discharge chamber in a stationary plasma thruster operating on krypton in order to increase its thrust efficiency and service life is provided.","PeriodicalId":671,"journal":{"name":"Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques","volume":"19 3","pages":"739 - 753"},"PeriodicalIF":0.4,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145135008","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

Interference Techniques for Measuring the Surface Profile of Extended Samples 扩展样品表面轮廓测量的干涉技术

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Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques Pub Date : 2025-09-25 DOI: 10.1134/S1027451025700995

A. D. Akhsakhalyan, M. S. Mikhailenko, A. E. Pestov, E. V. Petrakov, E. I. Glushkov, A. K. Chernyshev, N. I. Chkhalo

引用次数: 0