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Light pressure-induced secondary orbital resonances in dynamics of near-Earth objects 近地天体动力学中的轻压力诱导次轨道共振
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-02-12 DOI: 10.1007/s11182-025-03386-3
I. V. Tomilova, T. V. Bordovitsyna, T. V. Shaforostov
{"title":"Light pressure-induced secondary orbital resonances in dynamics of near-Earth objects","authors":"I. V. Tomilova,&nbsp;T. V. Bordovitsyna,&nbsp;T. V. Shaforostov","doi":"10.1007/s11182-025-03386-3","DOIUrl":"10.1007/s11182-025-03386-3","url":null,"abstract":"<div><p>The paper confirms the presence of secondary resonances induced by the light pressure in the dynamics of near-Earth objects moving in the resonance region. Research findings are obtained by numerical simulation and analysis of the dynamics of a large number of objects moving in a series of orbital resonances of different orders. It is shown that secondary resonances accompany orbital resonances, covering them from above and below along the semi-major axis.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 12","pages":"2361 - 2367"},"PeriodicalIF":0.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Combustion synthesis of porous single-phase β-SiAlON (z = 3) 燃烧合成多孔单相β-SiAlON （z = 3）
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-02-07 DOI: 10.1007/s11182-025-03383-6
A. A. Reger, P. E. Vashurkin
{"title":"Combustion synthesis of porous single-phase β-SiAlON (z = 3)","authors":"A. A. Reger,&nbsp;P. E. Vashurkin","doi":"10.1007/s11182-025-03383-6","DOIUrl":"10.1007/s11182-025-03383-6","url":null,"abstract":"<div><p>Self-propagating high-temperature synthesis (SHS) is widely used for producing nitride and oxynitride powders. To directly synthesize porous nitrogen ceramics with the predetermined size, shape, and structure, it is necessary: (1) to determine the process conditions for maximizing the conversion rate of the initial reagents into the target ceramic phases and (2) to develop the methods for structuring the reactive powder mixtures into a porous block that can retain the pore-channels size-, shape-, and structure during the synthesis. The conditions for SHS of single-phase β-SiAlON (<i>z</i> = 3) porous blocks using the reaction mixture of Al, Si, and microsilica powders diluted with a sialon-based powder self-made by milling the synthesized ceramic at a low conversion rate are described. The effect of the chemical composition, characteristic size and density of the reactive powder sample, and the nitrogen pressure on the parameters of the combustion process and the synthesized ceramics composition are studied. The critical and optimal parameters of the synthesis are revealed. A possibility of synthesizing single-phase β-Si<sub>3</sub>Al<sub>3</sub>O<sub>3</sub>N<sub>5</sub> porous blocks free of melted regions is shown for the cases where the reactive mixture contains at least 50 wt.% diluent powder.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 12","pages":"2340 - 2348"},"PeriodicalIF":0.4,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fractal dynamics of solution moments for the KPP–Fisher equation KPP-Fisher方程解矩的分形动力学
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-02-07 DOI: 10.1007/s11182-024-03319-6
A. V. Shapovalov, S. A. Siniukov
{"title":"Fractal dynamics of solution moments for the KPP–Fisher equation","authors":"A. V. Shapovalov,&nbsp;S. A. Siniukov","doi":"10.1007/s11182-024-03319-6","DOIUrl":"10.1007/s11182-024-03319-6","url":null,"abstract":"<div><p>The paper focuses on the KPP–Fisher equation (named after Andrey Kolmogorov, Ivan Petrovskii, Nikolai Piskunov and Ronald Fisher) with non-local competitive losses and fractal time derivative which is considered in terms of F<sup>α</sup>-calculus on the Cantor set dimension 0 &lt; α &lt; 1. A dynamic system with the fractal time derivative relating to the moments not higher than the second-order for the KPP–Fisher equation, is deduced in the semiclassical approximation with respect to the small diffusion parameter in the class of trajectory-concentrated functions. An example is given to the dynamic system of solution moments constructed and explored for various values of α parameter.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 11","pages":"1827 - 1837"},"PeriodicalIF":0.4,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143570979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analyzing the strength of space objects in dense atmospheric layers 分析稠密大气层中空间物体的强度
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-02-07 DOI: 10.1007/s11182-025-03380-9
M. V. Yumashev, T. A. Kartvelishvili, F. B. Kiselev
{"title":"Analyzing the strength of space objects in dense atmospheric layers","authors":"M. V. Yumashev,&nbsp;T. A. Kartvelishvili,&nbsp;F. B. Kiselev","doi":"10.1007/s11182-025-03380-9","DOIUrl":"10.1007/s11182-025-03380-9","url":null,"abstract":"<div><p>The mechanisms of destruction of a solid body (meteor) during re-entry into the atmosphere are studied. It is known that the consequences of a meteoroid entering the Earth’s atmosphere can vary from its complete combustion without significant adverse impacts to the fall of fragments of different sizes, causing considerable damage. Among the possible mechanisms of destruction is the occurrence of thermomechanical stresses due to the inhomogeneity of the body heating during its flight in dense layers of the atmosphere. The calculations show that during 20–30 s of flight, there appear the temperature gradients of different signs. Practice shows that fragmentation occurs just in the specified time interval from the entry of the body into the atmosphere, which directly indicates the thermomechanical destruction mechanism. The results can be useful for understanding the physical processes occurring during the combustion of space objects, for modeling the relevant thermal processes, as well as for improving the methods of detection, assessment and prediction of the motion and interaction of space objects with the Earth’s atmosphere.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 12","pages":"2318 - 2325"},"PeriodicalIF":0.4,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ferrite pastes for additive manufacturing of microwave devices 微波器件增材制造用铁氧体浆料
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-02-05 DOI: 10.1007/s11182-025-03391-6
N. S. Trufanova, A. Ignatieva, E. I. Trenkal, S. A. Artischev, E. R. Ragimov, R. M. Gadirov
{"title":"Ferrite pastes for additive manufacturing of microwave devices","authors":"N. S. Trufanova,&nbsp;A. Ignatieva,&nbsp;E. I. Trenkal,&nbsp;S. A. Artischev,&nbsp;E. R. Ragimov,&nbsp;R. M. Gadirov","doi":"10.1007/s11182-025-03391-6","DOIUrl":"10.1007/s11182-025-03391-6","url":null,"abstract":"<div><p>The paper studies ferrite pastes based on lithium-containing ferrite (Li<sub>0.4</sub>Fe<sub>2.4</sub>Zn<sub>0.2</sub>O<sub>4</sub>). A selection of the binder composition is described herein. Pastes based on the binding terpineol with polyethylene glycol demonstrate the best porosity and application quality. The frequency response of the microstrip transmission line with a ferrite sublayer is studied. As a result, the determined parameters of the ferrite layer are determined to be the dielectric permittivity (ε = 16), loss-angle tangent (tanδ = 0.3) and magnetic permeability (μ = 40).</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 12","pages":"2397 - 2407"},"PeriodicalIF":0.4,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structural damage of nanocrystalline Fe-10Ni-20Cr alloy at increasing radiation dose 纳米晶Fe-10Ni-20Cr合金在增加辐射剂量下的结构损伤
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-02-05 DOI: 10.1007/s11182-025-03363-w
K. P. Zolnikov, D. S. Kryzhevich, A. V. Korchuganov, O. A. Berezikov
{"title":"Structural damage of nanocrystalline Fe-10Ni-20Cr alloy at increasing radiation dose","authors":"K. P. Zolnikov,&nbsp;D. S. Kryzhevich,&nbsp;A. V. Korchuganov,&nbsp;O. A. Berezikov","doi":"10.1007/s11182-025-03363-w","DOIUrl":"10.1007/s11182-025-03363-w","url":null,"abstract":"<div><p>Using molecular dynamics simulation, this paper studies structural changes in the nanocrystalline Fe-10Ni-20Cr alloy at different irradiation doses. The alloy structure tends to recrystallize with increasing irradiation dose. The main recrystallization mechanism is the interaction of grain boundaries with atomic displacement cascades, generated point defect clusters and neighboring grain boundaries.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 12","pages":"2185 - 2190"},"PeriodicalIF":0.4,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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 axial load on structure and strength of a heterogeneous joint of titanium alloy Ti-6Al-4V and aluminum alloy Al-6Zn-2Mg-2Cu formed by friction stir welding 轴向载荷对搅拌摩擦焊钛合金Ti-6Al-4V与铝合金Al-6Zn-2Mg-2Cu非均质接头组织和强度的影响
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-02-05 DOI: 10.1007/s11182-025-03365-8
A. I. Amirov, A. V. Chumaevskii, E. A. Sidorov, N. L. Savchenko, E. A. Kolubaev
{"title":"Influence of axial load on structure and strength of a heterogeneous joint of titanium alloy Ti-6Al-4V and aluminum alloy Al-6Zn-2Mg-2Cu formed by friction stir welding","authors":"A. I. Amirov,&nbsp;A. V. Chumaevskii,&nbsp;E. A. Sidorov,&nbsp;N. L. Savchenko,&nbsp;E. A. Kolubaev","doi":"10.1007/s11182-025-03365-8","DOIUrl":"10.1007/s11182-025-03365-8","url":null,"abstract":"<div><p>The friction stir welding is performed on rolled sheets of titanium alloy Ti-6Al-4V and aluminum alloy Al-6Zn-2Mg-2Cu, using an overlapping technique, implementing liquid cooling of the welded joints and applying various axial loads. The interaction between the two alloys within the stir zone of the joints is examined using metallographic analysis. The results demonstrate that a variation of the axial load parameters during friction stir welding significantly influences the strength properties of the joints.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 12","pages":"2198 - 2205"},"PeriodicalIF":0.4,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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 high-temperature thermomechanical treatment with deformation at 900 °C on structural-phase state and microhardness of EK-181 steel 900 ℃高温变形热处理对EK-181钢组织相状态和显微硬度的影响
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-02-05 DOI: 10.1007/s11182-025-03366-7
V. V. Osipova, N. A. Polekhina, I. Yu. Litovchenko, V. M. Chernov, I. S. Kamantsev
{"title":"Influence of high-temperature thermomechanical treatment with deformation at 900 °C on structural-phase state and microhardness of EK-181 steel","authors":"V. V. Osipova,&nbsp;N. A. Polekhina,&nbsp;I. Yu. Litovchenko,&nbsp;V. M. Chernov,&nbsp;I. S. Kamantsev","doi":"10.1007/s11182-025-03366-7","DOIUrl":"10.1007/s11182-025-03366-7","url":null,"abstract":"<div><p>The microstructure of 12% chromium ferritic-martensitic steel EK-181 formed during thermomechanical treatment with deformation at 900 °C is investigated. It is shown that this treatment leads to a refinement of the parameters of the steel microstructure and an increase in the dislocation density and the magnitude of microdistortions of the crystal lattice, compared to the state after quenching. Plastic deformation at 900 °C followed by tempering allows reducing the average sizes of the prior-austenite grains by 2 times, the width of martensite laths by almost 4 times, and the particles of the carbide phase M<sub>23</sub>C<sub>6</sub> by 2 times, compared to the state after traditional heat treatment. In this case, the density of dislocations and the degree of lattice microdistortions increase by 2 times. The microhardness of EK-181 steel is also studied. It is shown that plastic deformation at 900 °C leads to a 15% increase in the steel microhardness in the quenched state and by 10% after additional tempering.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 12","pages":"2206 - 2212"},"PeriodicalIF":0.4,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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 homogenization annealing and equal channel angular pressing on the microstructure and mechanical properties of magnesium alloy Mg-1Zn-0.15Ca 均匀化退火和等径角挤压对Mg-1Zn-0.15Ca镁合金组织和力学性能的影响
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-02-05 DOI: 10.1007/s11182-025-03370-x
G. S. Dyakonov, E. V. Vorobiev, D. T. Miftakhov
{"title":"Effect of homogenization annealing and equal channel angular pressing on the microstructure and mechanical properties of magnesium alloy Mg-1Zn-0.15Ca","authors":"G. S. Dyakonov,&nbsp;E. V. Vorobiev,&nbsp;D. T. Miftakhov","doi":"10.1007/s11182-025-03370-x","DOIUrl":"10.1007/s11182-025-03370-x","url":null,"abstract":"<div><p>The microstructural features and mechanical properties of the Mg-1Zn‑0.15Ca alloy after homogenization annealing at <i>T</i> = 450 °C are investigated. The annealing is shown to result in a homogeneous distribution of zinc in the grain volume. The stabilization of the grain size after annealing for 4–12 h is attributed to the influence of globular particles at the boundaries. The equal channel angle pressing reduced the average size from 300 μm to 3 μm. This provided an increase in strength and elongation to 270 MPa and 13%, respectively.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 12","pages":"2241 - 2248"},"PeriodicalIF":0.4,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","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 high-temperature forging on the structure and mechanical properties of sintered Al–7Fe–38Sn alloy 高温锻造对烧结Al-7Fe-38Sn合金组织和力学性能的影响
IF 0.4 4区 物理与天体物理
Russian Physics Journal Pub Date : 2025-02-05 DOI: 10.1007/s11182-025-03375-6
N. M. Rusin, A. L. Skorentsev, V. E. Likharev
{"title":"Effect of high-temperature forging on the structure and mechanical properties of sintered Al–7Fe–38Sn alloy","authors":"N. M. Rusin,&nbsp;A. L. Skorentsev,&nbsp;V. E. Likharev","doi":"10.1007/s11182-025-03375-6","DOIUrl":"10.1007/s11182-025-03375-6","url":null,"abstract":"<div><p>The structure and mechanical properties of the sintered Al-7Fe-38Sn composite sample after its processing by forging in a closed die by 50% have been studied. It has been established that the homogeneity of the sample flow is determined by the value of friction forces of its ends against the punches and channel walls of the die. The forging temperature has a significant effect on the value of the friction forces. The application of back pressure does not affect the nature of the plastic flow of the material, but allows one to avoid cracking of the samples.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 12","pages":"2280 - 2287"},"PeriodicalIF":0.4,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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