Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2023-5-1-26-32
M.K. Vronskii, A. Ivanov, L. A. Sokura, A. Kremleva, D. Bauman
β-Ga2O3 thin films were obtained by the sol-gel method on sapphire and quartz substrates, as well as on Cu-O buffer layers. It was shown that the sol-gel method allowed to obtain β-Ga2O3 thin films with good optical and structural properties by using X-ray diffraction, scanning electron microscopy and optical spectroscopy. The energy of the optical band gap of Ga2O3 films calculated by the Tauc plot varied from 4.39 to 4.59 eV.
{"title":"Structural Properties of β-Ga2O3 Thin Films Obtained on Different Substrates by Sol-Gel Method","authors":"M.K. Vronskii, A. Ivanov, L. A. Sokura, A. Kremleva, D. Bauman","doi":"10.17586/2687-0568-2023-5-1-26-32","DOIUrl":"https://doi.org/10.17586/2687-0568-2023-5-1-26-32","url":null,"abstract":"β-Ga2O3 thin films were obtained by the sol-gel method on sapphire and quartz substrates, as well as on Cu-O buffer layers. It was shown that the sol-gel method allowed to obtain β-Ga2O3 thin films with good optical and structural properties by using X-ray diffraction, scanning electron microscopy and optical spectroscopy. The energy of the optical band gap of Ga2O3 films calculated by the Tauc plot varied from 4.39 to 4.59 eV.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127911024","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}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2021-3-1-55-95
A. Romanov, A. Kolesnikova
{"title":"Elasticity Boundary-Value Problems for Straight Wedge Disclinations. A Review on Methods and Results","authors":"A. Romanov, A. Kolesnikova","doi":"10.17586/2687-0568-2021-3-1-55-95","DOIUrl":"https://doi.org/10.17586/2687-0568-2021-3-1-55-95","url":null,"abstract":"","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128838571","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}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2021-3-4-47-51
V.E. Volkovitskiy, V. Spiridonov, L. Azina, D. I. Panov
In this article, we report on the fabrication of a solid-state lithium-boron-phosphate electrolyte and the study of the dependence of its electrical properties on electrode materials and heat treatment. Impedance spectroscopy was used to analyze the solid-state electrolyte. The values of conductivity of samples heat-treated at 850 °C and 900 °C have been found as 2.02·10–4 S·cm–1 and 4.28·10–4 S·cm–1, respectively.
{"title":"Design and Analysis of the Electrical Properties of a Solid-State Lithium-Boron-Phosphate Electrolyte","authors":"V.E. Volkovitskiy, V. Spiridonov, L. Azina, D. I. Panov","doi":"10.17586/2687-0568-2021-3-4-47-51","DOIUrl":"https://doi.org/10.17586/2687-0568-2021-3-4-47-51","url":null,"abstract":"In this article, we report on the fabrication of a solid-state lithium-boron-phosphate electrolyte and the study of the dependence of its electrical properties on electrode materials and heat treatment. Impedance spectroscopy was used to analyze the solid-state electrolyte. The values of conductivity of samples heat-treated at 850 °C and 900 °C have been found as 2.02·10–4 S·cm–1 and 4.28·10–4 S·cm–1, respectively.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124698185","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}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2023-5-1-1-9
B. V. Rumyantsev, I. Guk, A. Kozachuk, A. I. Mikhailin, V. Shevchenko, N. Silnikov, S. N. Perevislov
The protective properties of metallic and nonmetallic screens were experimentally investigated when penetrated by an aluminum shaped charge jet at collision velocities of 7–10 km/s. Such a projectile is an analog of an elongated fragment of man-made debris. For materials of protective screens, we used glass, B4C ceramics, and diamond-silicon carbide ceramic composite. The obtained results were compared with the data obtained for metal screens. In this paper, we show that the effectiveness of screen protection increases due to phase and structural transitions that occur during the interaction of elongated hypervelocity projectile with protective screens.
{"title":"Metal and Nonmetal Protective Screens for Hypervelocity Debris Shielding","authors":"B. V. Rumyantsev, I. Guk, A. Kozachuk, A. I. Mikhailin, V. Shevchenko, N. Silnikov, S. N. Perevislov","doi":"10.17586/2687-0568-2023-5-1-1-9","DOIUrl":"https://doi.org/10.17586/2687-0568-2023-5-1-1-9","url":null,"abstract":"The protective properties of metallic and nonmetallic screens were experimentally investigated when penetrated by an aluminum shaped charge jet at collision velocities of 7–10 km/s. Such a projectile is an analog of an elongated fragment of man-made debris. For materials of protective screens, we used glass, B4C ceramics, and diamond-silicon carbide ceramic composite. The obtained results were compared with the data obtained for metal screens. In this paper, we show that the effectiveness of screen protection increases due to phase and structural transitions that occur during the interaction of elongated hypervelocity projectile with protective screens.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122140855","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}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2023-5-2-32-55
T. Orlova, M. Gutkin
This is a brief review of recent experimental and theoretical results on the influence of low temperature annealing and subsequent small plastic deformation on microstructure, strength and ductility of ultrafine-grained Al and Al-based alloys structured by high pressure torsion. Some earlier results on this problem for ultrafine-grained Al and Al-based alloys structured by different methods of severe plastic deformation are also shortly presented. The reasons for the effects of hardening by annealing and softening by additional small plastic deformation of the materials are suggested and discussed in detail. Moreover, the influence of the temperature of mechanical testing and the alloying elements are in the focus of the review. It is shown that in the physical origin of these effects are the transformations of the defect structure of grain boundaries in the process of low temperature annealing and subsequent small plastic deformation of the ultrafine-grained Al and Al-based alloys structured by high pressure torsion.
{"title":"Effects of Hardening by Annealing and Softening by Additional Plastic Deformation in Ultrafine-Grained Al and Al-Based Alloys: Brief Review","authors":"T. Orlova, M. Gutkin","doi":"10.17586/2687-0568-2023-5-2-32-55","DOIUrl":"https://doi.org/10.17586/2687-0568-2023-5-2-32-55","url":null,"abstract":"This is a brief review of recent experimental and theoretical results on the influence of low temperature annealing and subsequent small plastic deformation on microstructure, strength and ductility of ultrafine-grained Al and Al-based alloys structured by high pressure torsion. Some earlier results on this problem for ultrafine-grained Al and Al-based alloys structured by different methods of severe plastic deformation are also shortly presented. The reasons for the effects of hardening by annealing and softening by additional small plastic deformation of the materials are suggested and discussed in detail. Moreover, the influence of the temperature of mechanical testing and the alloying elements are in the focus of the review. It is shown that in the physical origin of these effects are the transformations of the defect structure of grain boundaries in the process of low temperature annealing and subsequent small plastic deformation of the ultrafine-grained Al and Al-based alloys structured by high pressure torsion.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132908923","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}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2022-4-3-7-16
A. Knyazeva
The article describes some problems arising in the construction of models of synthesis of composites in modern technologies, which allow predicting the evolution of composition and properties. It is emphasized that the known two-level models practically do not discuss the correspondence between scales and the correctness of information transfer from one level to another, the correctness of computational algorithms requiring the agreement of scales both physical and geometrical. A general approach to building two-level models of synthesis of composites with reinforcing particles based on separation of physical scales is described. It is shown that two-level models of composites synthesis have thermodynamic justification. The variants of estimation of stresses accompanying the change of composition at micro-(meso-)level are proposed. Possible variants of mesolevel submodels for description of composition evolution are briefly presented.
{"title":"A Two-Level Approach to Describing the Process of Composite Synthesis","authors":"A. Knyazeva","doi":"10.17586/2687-0568-2022-4-3-7-16","DOIUrl":"https://doi.org/10.17586/2687-0568-2022-4-3-7-16","url":null,"abstract":"The article describes some problems arising in the construction of models of synthesis of composites in modern technologies, which allow predicting the evolution of composition and properties. It is emphasized that the known two-level models practically do not discuss the correspondence between scales and the correctness of information transfer from one level to another, the correctness of computational algorithms requiring the agreement of scales both physical and geometrical. A general approach to building two-level models of synthesis of composites with reinforcing particles based on separation of physical scales is described. It is shown that two-level models of composites synthesis have thermodynamic justification. The variants of estimation of stresses accompanying the change of composition at micro-(meso-)level are proposed. Possible variants of mesolevel submodels for description of composition evolution are briefly presented.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130982996","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}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2022-4-2-15-31
V. V. Kaminskii, E. Abe, Y. Kawamura, L. Dorogin, A. Romanov
Kink band formation (kinking) in layered materials is reviewed. Metal alloys with a long period stacking ordered structure (LPSO) based on Mg-Zn-Y system along with other layered materials demonstrating laminar structure at various scales are put into focus. Despite the variety of layered materials, most of them have common patterns in formation of kinks during deformation. We consider kinking as a specific mechanism of plastic deformation that is illustrated by experimental and theoretical data accumulated in the academic literature during more than five decades of research.
{"title":"Kinking in LPSO Mg-Zn-Y Alloys and Other Layered Materials","authors":"V. V. Kaminskii, E. Abe, Y. Kawamura, L. Dorogin, A. Romanov","doi":"10.17586/2687-0568-2022-4-2-15-31","DOIUrl":"https://doi.org/10.17586/2687-0568-2022-4-2-15-31","url":null,"abstract":"Kink band formation (kinking) in layered materials is reviewed. Metal alloys with a long period stacking ordered structure (LPSO) based on Mg-Zn-Y system along with other layered materials demonstrating laminar structure at various scales are put into focus. Despite the variety of layered materials, most of them have common patterns in formation of kinks during deformation. We consider kinking as a specific mechanism of plastic deformation that is illustrated by experimental and theoretical data accumulated in the academic literature during more than five decades of research.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132571598","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}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2021-3-4-34-46
T. Nguyen Van
In this article, a new solution to the elasticity boundary-value problem for a dilatational cylindrical inclusion embedded in an elastically isotropic half-space is presented. To solve this problem, the results for the infinitesimally thin dilatational disk in an elastically isotropic half-space, are explored. For displacements, strains, and stresses of a dilatational cylindrical inclusion, the analytical expressions are obtained with Lipschitz-Hankel integrals. The comparison of the found solution with previously known one, is given.
{"title":"Elastic Field of a Dilatational Cylindrical Inclusion in an Elastically Isotropic Half-Space","authors":"T. Nguyen Van","doi":"10.17586/2687-0568-2021-3-4-34-46","DOIUrl":"https://doi.org/10.17586/2687-0568-2021-3-4-34-46","url":null,"abstract":"In this article, a new solution to the elasticity boundary-value problem for a dilatational cylindrical inclusion embedded in an elastically isotropic half-space is presented. To solve this problem, the results for the infinitesimally thin dilatational disk in an elastically isotropic half-space, are explored. For displacements, strains, and stresses of a dilatational cylindrical inclusion, the analytical expressions are obtained with Lipschitz-Hankel integrals. The comparison of the found solution with previously known one, is given.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125742566","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}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2021-3-4-1-6
Z. Gudkina, S. Krasnitckii, M. Gutkin
An elastic model for a cylindrical dilatational inclusion of annular-sector cross-section in an infinite elastic medium is considered. The stress fields are found in a closed analytical form and are illustrated by stress maps. Specific features in the stress distribution are revealed and discussed in detail. It is shown that the stress magnitude can be so high that various mechanisms of stress relaxation can be activated.
{"title":"Misfit Stresses Due to a Cylindrical Dilatational Inclusion of Annular-Sector Cross-Section in an Infinite Elastic Medium","authors":"Z. Gudkina, S. Krasnitckii, M. Gutkin","doi":"10.17586/2687-0568-2021-3-4-1-6","DOIUrl":"https://doi.org/10.17586/2687-0568-2021-3-4-1-6","url":null,"abstract":"An elastic model for a cylindrical dilatational inclusion of annular-sector cross-section in an infinite elastic medium is considered. The stress fields are found in a closed analytical form and are illustrated by stress maps. Specific features in the stress distribution are revealed and discussed in detail. It is shown that the stress magnitude can be so high that various mechanisms of stress relaxation can be activated.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115280005","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}
Pub Date : 1900-01-01DOI: 10.17586/2687-0568-2023-5-1-22-25
E.A. Ryabkova, L. A. Sokura, A. Ivanov, I. Sosnin, A. Kremleva, М.V. Dorogov
Micro- and nanoparticles of β-Ga2O3 are synthesized as a result of chemical reaction of an aqueous solution of gallium nitrate and various alkalis: ammonia, sodium, potassium, and lithium hydroxides. It is shown that particles morphology depends on the type and concentration of alkali. The use of microwave treatment of ammonia containing solutions made it possible to change the shape of particles from ellipsoidal to parallelepiped while maintaining their size. In contrast to the synthesis with ammonia, for other alkalis dispersed particles were obtained only at a ratio of alkali to gallium nitrate equal to 3, and these particles did not belong to the gallium oxide β-phase.
{"title":"Effect of Solution Composition on the Morphology of Synthesized β-Ga2O3 Particles","authors":"E.A. Ryabkova, L. A. Sokura, A. Ivanov, I. Sosnin, A. Kremleva, М.V. Dorogov","doi":"10.17586/2687-0568-2023-5-1-22-25","DOIUrl":"https://doi.org/10.17586/2687-0568-2023-5-1-22-25","url":null,"abstract":"Micro- and nanoparticles of β-Ga2O3 are synthesized as a result of chemical reaction of an aqueous solution of gallium nitrate and various alkalis: ammonia, sodium, potassium, and lithium hydroxides. It is shown that particles morphology depends on the type and concentration of alkali. The use of microwave treatment of ammonia containing solutions made it possible to change the shape of particles from ellipsoidal to parallelepiped while maintaining their size. In contrast to the synthesis with ammonia, for other alkalis dispersed particles were obtained only at a ratio of alkali to gallium nitrate equal to 3, and these particles did not belong to the gallium oxide β-phase.","PeriodicalId":332408,"journal":{"name":"Reviews on Advanced Materials and Technologies","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124671251","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}
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