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Study of the Evolution of the Phase Composition of Laser Welded Joints of Third-Generation Al–Li Alloys with the Use of Synchrotron Radiation 同步辐射对第三代铝锂合金激光焊接接头相组成演变的研究
IF 0.48 Q4 Physics and Astronomy Pub Date : 2025-01-17 DOI: 10.1134/S1062873824708857
A. G. Malikov, I. E. Vitoshkin, M. I. Mironova, A. P. Zavjalov, K. E. Kuper

We studied the evolution of the phase composition of laser welded joints before and after heat treatment of 3rd generation Al–Li alloys using synchrotron radiation. The article demonstrates the fundamental role of the alloying elements of copper and lithium in formation of the phase composition of the fusion zone of the weld. It has been established that laser exposure changes the phase composition of the alloy. Namely, low copper contents mainly lead to formation of T2(Al6CuLi3) and T3(Al5CuLi3) phases, the average copper contents form T1(Al2CuLi), T2(Al6CuLi3), T3(Al5CuLi3) phases and the presence of high copper contents results in formation of T1(Al2CuLi) phase at the boundaries of dendrite. Post-heat treatment restores the initial phase composition in the fusion zone. As for the solid solution, the δ'(Al3Li) phase is formed at low copper contents, the δ'(Al3Li) and T1(Al2CuLi) phases are formed at average copper contents, and T1(Al2CuLi) phase is observed at high copper contents. Consequently, this makes it possible to improve the mechanical properties of weld joint specimens to match the numbers of the initial alloy.

对第三代铝锂合金同步辐射热处理前后激光焊接接头相组成的变化进行了研究。论述了铜和锂合金元素在焊缝熔合区相组成形成中的基本作用。结果表明,激光辐照改变了合金的相组成。即低铜含量主要导致T2(Al6CuLi3)和T3(Al5CuLi3)相的形成,平均铜含量形成T1(Al2CuLi)、T2(Al6CuLi3)、T3(Al5CuLi3)相,高铜含量的存在导致枝晶边界处形成T1(Al2CuLi)相。后热处理恢复了熔合区的初始相组成。固相中,低铜含量时形成δ′(Al3Li)相,平均铜含量时形成δ′(Al3Li)相和T1(Al2CuLi)相,高铜含量时形成T1(Al2CuLi)相。因此,这使得改善焊接接头试样的力学性能以匹配初始合金的数量成为可能。
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引用次数: 0
Hard X-Ray Diffraction Phase Analysis of Kidney Stones inside Phantom Objects 幻影物体内肾结石的硬x射线衍射物相分析
IF 0.48 Q4 Physics and Astronomy Pub Date : 2025-01-17 DOI: 10.1134/S1062873824708869
A. I. Nizovskii, A. N. Shmakov, A. A. Legkodymov, D. V. Dorokhova, V. I. Bukhtiyarov

X-ray diffraction on synchrotron radiation was used to analyze kidney stones as part of phantom objects simulating the patient’s body. The radiation photon energies were 33.7, 67 and 112 keV. It has been shown that the use of synchrotron monochromatic radiation with photon energy E ≥ 67 keV allows one to reliably identify the mineral composition of uroliths. The shift to a higher photon energy range can significantly reduce the radiation load on patients during diagnosis. The patient’s weight factor also becomes less critical.

同步辐射x射线衍射用于分析肾结石作为模拟患者身体的幻影物体的一部分。辐射光子能量分别为33.7、67和112 keV。研究表明,使用光子能量E≥67 keV的同步加速器单色辐射可以可靠地鉴定尿石的矿物组成。转移到更高的光子能量范围可以显著减少患者在诊断期间的辐射负荷。病人的体重因素也变得不那么重要了。
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引用次数: 0
Natural Ferromagnetic Resonance in Cobalt Ferrite Powders 钴铁氧体粉末的天然铁磁共振
IF 0.48 Q4 Physics and Astronomy Pub Date : 2025-01-17 DOI: 10.1134/S1062873824708729
S. V. Stolyar, O. A. Li, E. D. Nikolaeva, A. M. Vorotynov, D. A. Velikanov, I. G. Vazhenina, O. A. Bayukov, R. S. Iskhakov, N. M. Boev, A. O. Shokhrina, M. N. Volochaev, A. L. Sukhachev

The structure, magnetic properties and ferromagnetic resonance curves of cobalt ferrite particles synthesized by chemical coprecipitation technique have been studied. The possibility of resonant heating of powder in a magnetic anisotropy field of particles is shown, which can find application in medicine for magnetic hyperthermia.

研究了化学共沉淀法合成的钴铁氧体颗粒的结构、磁性能和铁磁共振曲线。研究了粉末在粒子磁各向异性磁场中共振加热的可能性,并在医学上应用于磁热疗。
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引用次数: 0
Simulation of Phase Shift of Spin Waves Passing through an Electrically Controlled Domain Wall 自旋波通过电控畴壁相移的模拟
IF 0.48 Q4 Physics and Astronomy Pub Date : 2025-01-17 DOI: 10.1134/S106287382470878X
N. V. Myasnikov, A. P. Pyatakov

We considered a domain wall as a structure which shifts the phase of a propagating spin wave under the condition of applied electric field by means of an inhomogeneous magnetoelectric coupling. The result is that the electrically induced transition of the Bloch domain wall into the Néel domain wall changes the phase of spin wave passed through the domain wall by nearly 180°.

我们认为畴壁是一种在外加电场作用下,通过非均匀磁电耦合使传播中的自旋波发生相移的结构。结果表明,Bloch畴壁的电诱导跃迁使通过畴壁的自旋波的相位改变了近180°。
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引用次数: 0
Concentration and Angular Dependences of Ferromagnetic Resonance Parameters and Magnetic Structure of CoTaNb/MgO Composite Films CoTaNb/MgO复合膜铁磁共振参数和磁性结构的浓度和角依赖性
IF 0.48 Q4 Physics and Astronomy Pub Date : 2025-01-17 DOI: 10.1134/S1062873824708833
L. N. Kotov, Z. N. Blinov, P. D. Kovalev, D. V. Zavarin, Yu. E. Kalinin, A. V. Sitnikov

Concentration and angular dependences of the parameters (line width and position) of ferromagnetic resonance (FMR) for CoTaNb/MgO composite films with metal alloy concentrations x = 0.27–0.72 were obtained in the work. Granular, granular-percolation structure and zigzag stripe magnetic structure for films with different x were detected. An increase in the FMR parameters with an increase in the angle from 0° to 90° between the constant magnetic field and the film plane with different x was observed. It was shown in the work that the behavior of the angular dependences strongly depends on the magnetic structure of the films, which have the greatest change in the region of transition from granular to granular-percolation structure with extended magnetic metallic microregions. The FMR method is a structure-sensitive method for scientific studies of the electromagnetic properties of thin magnetic composite films with granular and percolation structures and their combinations was demonstrated.

得到了金属合金浓度x = 0.27 ~ 0.72的CoTaNb/MgO复合膜的铁磁共振(FMR)参数(线宽和位置)的浓度和角依赖关系。在不同x值的情况下,检测到膜的颗粒状结构、颗粒-渗透结构和锯齿条纹磁性结构。在恒定磁场与膜平面夹角从0°增加到90°时,FMR参数随x的变化而增加。研究结果表明,膜的磁结构对膜的角依赖行为有很大的影响,在从颗粒状到颗粒状渗透结构的过渡区域变化最大,具有扩展的磁性金属微区。FMR方法是一种结构敏感的方法,用于科学研究具有颗粒和渗透结构的磁性复合薄膜的电磁特性,并证明了它们的组合。
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引用次数: 0
Development of Detectors for Station 1–3 “Fast Processes” of the SKIF Center for Collective Use SKIF集体使用中心1-3站“快速过程”探测器的研制
IF 0.48 Q4 Physics and Astronomy Pub Date : 2025-01-17 DOI: 10.1134/S1062873824708870
L. I. Shekhtman, V. M. Aulchenko, V. E. Burdin, A. A. Glushak, M. A. Kornievsky, V. N. Kudryavtsev, V. M. Titov, O. P. Tolbanov, A. V. Tyazhev, A. N. Zarubin, V. V. Zhulanov

As a part of the first-stage experimental stations at the SKIF Center for Shared Use, a unique station 1–3 “Fast Processes” is being created, designed to study detonation, shock wave processes, as well as processes of reaction of materials to pulsed thermal or mechanical influence. The station will include three sections: the “Plasma” section, designed to study the processes of reaction of materials to pulsed thermal and mechanical loads; section “Dynamic processes, main building”, which is supposed to study shock wave processes and section “Dynamic processes, separate building”, intended for studying detonation and shock wave processes. To conduct experiments at stations 1–3, five coordinate X-ray detectors of various types are being developed. We described in detail the characteristics of the detectors and the status of development.

作为SKIF共享使用中心第一阶段实验站的一部分,正在创建一个独特的1-3“快速过程”站,旨在研究爆轰、冲击波过程以及材料对脉冲热或机械影响的反应过程。该站将包括三个部分:“等离子体”部分,用于研究材料对脉冲热负荷和机械负荷的反应过程;“动力过程,主建筑”一节,主要研究激波过程;“动力过程,独立建筑”一节,主要研究爆轰和激波过程。为了在1-3号站进行实验,正在研制5种不同类型的坐标x射线探测器。详细介绍了探测器的特点和发展现状。
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引用次数: 0
Magnetic Properties of Co73Fe4Si12B11 Ferromagnetic Microwires in Amorphous and Crystalline State Co73Fe4Si12B11铁磁微线的非晶态和晶态磁性能
IF 0.48 Q4 Physics and Astronomy Pub Date : 2025-01-17 DOI: 10.1134/S1062873824708808
A. E. Sarakueva, G. E. Danilov, Yu. B. Grebenshchikov, V. I. Odintsov, A. V. Popova, S. A. Gudoshnikov

We studied the magnetic properties of Co73Fe4Si12B11 ferromagnetic microwires in initial amorphous and crystalline state achieved by thermal treatment with direct current. A microwire in amorphous state is found to be characterized with quasilinear hysteresis loop with small coercive force less than 0.05 kA/m. Once crystallized, the microwire loses its soft magnetic properties, its hysteresis loop radically expands, and the coercive force becomes equal to 15 kA/m.

研究了Co73Fe4Si12B11铁磁微丝在直流热处理下的初始非晶和晶态的磁性能。在非晶状态下,微丝具有准线性磁滞回线,矫顽力小于0.05 kA/m。微丝一旦结晶,就失去了软磁特性,磁滞回线急剧膨胀,矫顽力达到15 kA/m。
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引用次数: 0
Diffractive Optical Elements for Three-Dimensional Nanoscopy Using Rotating Light Fields 基于旋转光场的三维纳米衍射光学元件
IF 0.48 Q4 Physics and Astronomy Pub Date : 2025-01-16 DOI: 10.1134/S1062873824708390
D. V. Prokopova, I. Yu. Eremchev, N. N. Losevsky, D. A. Belousov, S. K. Golubtsov, S. P. Kotova, A. V. Naumov

The authors study diffractive optical elements manufactured via contact printing on a dichromated gelatin and direct laser writing on photoresist. The elements modify the point-spread function for three-dimensional super resolution fluorescence microscopy. It is shown that both elements produce two-lobed rotating light fields that can be used for three-dimensional nanoscopy. Results from the subdiffractive localization of fluorescent labels are presented, and the accuracy of coordinate reconstruction is determined.

研究了在重铬酸盐明胶上接触印刷和在光刻胶上直接激光刻写的衍射光学元件。这些元素修改了三维超分辨荧光显微镜的点扩展函数。结果表明,这两种元素都能产生可用于三维纳米观察的双叶旋转光场。给出了荧光标记亚衍射定位的结果,并确定了坐标重建的精度。
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引用次数: 0
Thermal Characteristics of Amorphous Fe–Ni–Si–C Alloys 非晶态Fe-Ni-Si-C合金的热特性
IF 0.48 Q4 Physics and Astronomy Pub Date : 2025-01-16 DOI: 10.1134/S1062873824708675
O. Kuvandikov, N. S. Hamraev, R. M. Razhabov, I. Subkhankulov, Sh. A. Khomitov, D. H. Imamnazarov

Differential scanning calorimetry (DSC) is used to study the phase transformations of four amorphous metal alloys based on transition metals Fe and Ni with additives of Si and C. The temperature dependences of the heat flux upon phase transformations are measured along with changes in the mass and specific heat capacity of amorphous alloys. Two phase transformations associated with the temperature of glass transition and complete crystallization are identified. The relative volume of the crystalline fraction of alloys heated to 1000°C is calculated. It is concluded there are nanocrystalline phases between the first and second phase transitions at heating rates of 0.1°C/s.

采用差示扫描量热法(DSC)研究了在过渡金属Fe和Ni的基础上添加Si和c的四种非晶态金属合金的相变,测量了热流密度随相变的温度依赖性以及非晶态合金的质量和比热容的变化。确定了与玻璃化转变温度和完全结晶有关的两种相变。计算了合金在加热到1000℃时结晶部分的相对体积。在升温速率为0.1°C/s时,在第一相和第二相之间存在纳米晶相。
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引用次数: 0
Structural Features and the Effect of Temperature Memory in a Vitrivied Film of an Europium(III) β-Diketonate Complex 铕(III) β-二酮酸配合物玻璃化膜的结构特征及温度记忆效应
IF 0.48 Q4 Physics and Astronomy Pub Date : 2025-01-16 DOI: 10.1134/S1062873824708584
D. V. Lapaev, V. G. Nikiforov, D. K. Zharkov, A. A. Knyazev, Yu. G. Galyametdinov

Confocal optical microscopy data with a resolution of 1 μm on the spatial heterogeneity of a vitrified film prepared from a melt powder of an anisometric europium(III) β-diketonate complex are presented. It has been shown that the heterogeneity caused by crystalline inclusions in the amorphous structure of the film, leads to a temperature memory effect, when the film can be in different states at the same temperature.

用分辨率为1 μm的共聚焦光学显微镜研究了由非等距的β-二酮酸铕络合物熔粉制备的玻璃化膜的空间非均质性。结果表明,薄膜非晶结构中晶体夹杂物的非均质性导致薄膜在相同温度下可以处于不同状态,从而产生温度记忆效应。
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引用次数: 0
期刊
Bulletin of the Russian Academy of Sciences: Physics
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