Russian Physics Journal最新文献_第4页

Corrosion properties of bioresorbable Mg-Zn-Zr-Ce alloy in coarse-grained and ultrafine-grained states

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2025-02-12 DOI: 10.1007/s11182-025-03369-4

N. A. Luginin, A. Yu. Eroshenko, K. A. Prosolov, A. D. Kashin, M. A Khimich, Yu. P. Sharkeev

{"title":"Corrosion properties of bioresorbable Mg-Zn-Zr-Ce alloy in coarse-grained and ultrafine-grained states","authors":"N. A. Luginin, A. Yu. Eroshenko, K. A. Prosolov, A. D. Kashin, M. A Khimich, Yu. P. Sharkeev","doi":"10.1007/s11182-025-03369-4","DOIUrl":"10.1007/s11182-025-03369-4","url":null,"abstract":"<div><p>The results of the study of corrosion properties of a bioresorbable Mg-Zn-Zr-Ce magnesium alloy in coarse-grained (CG) and ultrafine-grained (UFG) states are presented. A solution of 0.9 wt.% NaCl (NaCl) and phosphate-buffered saline (PBS) is used as the corrosion medium. An ambiguous corrosion behavior of the alloy depending on its structural state and type of corrosion medium is revealed. The most favorable corrosion performance is observed for the UFG state of the Mg-Zn-Zr-Ce alloy held in the PBS solution for a period of 14 days. The mass gain of UFG alloy samples in this solution is 0.2%, while the mass loss of CG alloy samples is 0.5%. In the NaCl solution, the mass loss of UFG and CG alloy samples is comparable, being 0.3%. A distinctive feature of the corrosion behavior of the Mg-Zn-Zr-Ce alloy in both CG and UFG states in NaCl is the uneven dissolution of the samples compared to their dissolution in PBS. It is shown that the corrosion layer of the UFG alloy after tests in both PBS and NaCl twice as thin as the corrosion layer of the CG alloy, which is attributed to the formation of a passivation layer on the surface of the UFG samples due to the defect structure.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"67 12","pages":"2231 - 2240"},"PeriodicalIF":0.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612249","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

Machine learning driven models for microhardness estimation of composite materials 复合材料显微硬度估计的机器学习驱动模型

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2025-02-12 DOI: 10.1007/s11182-025-03409-z

A. E. Rezvanova, M. I. Kochergin, N. A. Luginin, V. V. Chebodaeva

{"title":"Machine learning driven models for microhardness estimation of composite materials","authors":"A. E. Rezvanova, M. I. Kochergin, N. A. Luginin, V. V. Chebodaeva","doi":"10.1007/s11182-025-03409-z","DOIUrl":"10.1007/s11182-025-03409-z","url":null,"abstract":"<div><p>This study is devoted to the development of models for predicting the microhardness of bulk composite materials by machine learning (ML) techniques. The microhardness prediction is based on standard mechanical tests, specifically employing the Vickers indentation method. To quantitatively assess the influence of material composition on the microhardness of the composites, we have developed a novel methodology. This approach involves constructing a surrogate model based on an ML Random Forest Method (RFM) and an analytical model for calculating the material hardness. The RFM simulates the probability distribution of the indenter imprint diagonal after microhardness tests which are the input data for the analytical model to compute the material hardness. The results of application of the RFM showed significantly greater accuracy (MSE is 7.42·10<sup>−4</sup>%) on the test data. Our findings underscore the synergistic potential of combination of experimental and computational simulation techniques, including machine learning, to predict the mechanical properties of the materials.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"68 1","pages":"113 - 121"},"PeriodicalIF":0.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818175","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

High-temperature thermal oxidation of composites based on isotactic polypropylene with aliphatic polyamide 6/66

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2025-02-12 DOI: 10.1007/s11182-025-03382-7

N. V. Vorontsov, A. L. Margolin, A. A. Popov

引用次数: 0

The influence of geometric parameters of reinforcement on the destruction of reinforced concrete structures under impact 钢筋几何参数对钢筋混凝土结构在冲击下破坏的影响

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2025-02-12 DOI: 10.1007/s11182-025-03403-5

S. P. Batuev, P. A. Radchenko, A. V. Radchenko

引用次数: 0

On lepton pair production by muons

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2025-02-12 DOI: 10.1007/s11182-025-03388-1

A. V. Bagulya, V. M. Grichine, V. N. Ivanchenko, I. V. Shreyber

引用次数: 0

Revolutionizing scanning electron microscopy with compound lenses: a comprehensive review 革命性的扫描电子显微镜与复合透镜：一个全面的审查

IF 0.4 4区物理与天体物理

Russian Physics Journal Pub Date : 2025-02-12 DOI: 10.1007/s11182-025-03401-7

Faiz Ahmad Mohammed, Mohammed Abdullah Mohammed, Parween R. Kareem, Mushtaq Abed Al-Jubbori

{"title":"Revolutionizing scanning electron microscopy with compound lenses: a comprehensive review","authors":"Faiz Ahmad Mohammed, Mohammed Abdullah Mohammed, Parween R. Kareem, Mushtaq Abed Al-Jubbori","doi":"10.1007/s11182-025-03401-7","DOIUrl":"10.1007/s11182-025-03401-7","url":null,"abstract":"<div><p>Compound lenses integrated into scanning electron microscopy (SEM) have transformed imaging possibilities by allowing higher resolution, improved image contrast, and better depth of focus than those of conventional single-element lenses. The basic ideas of compound lens systems are discussed in this review along with how their multi-element construction reduces typical electron optical aberrations and enhances general image performance. Examined are important technical developments like aberration-corrected optics and hybrid lens systems, which clearly affect SEM resolution and stability. Notwithstanding these developments, problems still exist including environmental effects on performance, susceptibility to misalignment, and high manufacturing costs. Potential future directions such as the use of improved materials, AI-driven image optimization, and multi-modal capabilities, which promise to improve the accessibility and usefulness of compound lenses, are also described in the paper. Compound lenses are likely to remain at the vanguard of SEM innovation by means of ongoing research and cooperative efforts solving these issues, thus promoting advances across scientific and industrial domains. This work attempts to provide a thorough knowledge of the present situation, difficulties, and future directions of compound lenses in SEM.</p></div>","PeriodicalId":770,"journal":{"name":"Russian Physics Journal","volume":"68 1","pages":"64 - 70"},"PeriodicalIF":0.4,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818174","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

Light pressure-induced secondary orbital resonances in dynamics of near-Earth objects

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

引用次数: 0

Combustion synthesis of porous single-phase 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, 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

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

引用次数: 0

Analyzing the strength of space objects in dense atmospheric layers

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, T. A. Kartvelishvili, 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