Inorganic Materials最新文献_第3页

Preparation of В4С/ZrB2 Ceramics via Boron Carbide Reduction 碳化硼还原法制备В4С/ZrB2陶瓷

IF 0.7 4区材料科学

Inorganic Materials Pub Date : 2025-06-30 DOI: 10.1134/S0020168525700177

T. S. Gudyma, R. R. Khabirov, Yu. L. Krutskii, N. Yu. Cherkasova, A. G. Anisimov, A. O. Semenov

{"title":"Preparation of В4С/ZrB2 Ceramics via Boron Carbide Reduction","authors":"T. S. Gudyma, R. R. Khabirov, Yu. L. Krutskii, N. Yu. Cherkasova, A. G. Anisimov, A. O. Semenov","doi":"10.1134/S0020168525700177","DOIUrl":"10.1134/S0020168525700177","url":null,"abstract":"In this paper, we report boron carbide preparation of В4С/ZrB2 composite ceramics. The ceramics have been prepared via pressing of B4C + ZrB2 powder mixtures and by reaction pressing. The content of the ZrB2 phase was varied from 10 to 30 mol %. Increasing the percentage of ZrB2 has been shown to reduce the open porosity of the composite ceramics and increase their relative density. Visual inspection showed that simultaneous boron carbide synthesis and hot pressing made it possible to obtain a B4C/10 mol % ZrB2 material with ZrB2 grains uniformly distributed over the bulk of the B4C phase. The microhardness and fracture toughness of this material were 38.3 GPa and 3.9 MPa m1/2, respectively, and its relative density was 99.9%. In the case of hot pressing of a presynthesized powder mixture, such results were obtained at a higher modifying additive content, corresponding to 30 mol % zirconium diboride. The composite ceramic containing 30 mol % ZrB2 has been shown to have a larger thermal neutron absorption cross section in comparison with the unmodified ceramic.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"60 13","pages":"1496 - 1504"},"PeriodicalIF":0.7,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spark Plasma Sintering for Compacting Vanadium Alloy-Based Metal–Ceramic Composites 放电等离子烧结致密化钒基金属陶瓷复合材料

IF 0.7 4区材料科学

Inorganic Materials Pub Date : 2025-06-30 DOI: 10.1134/S002016852570030X

Yu. N. Bespalko, S. N. Kharina, E. A. Suprun, T. A. Kriger, M. A. Esikov, I. S. Batraev, D. V. Dudina, V. A. Sadykov

引用次数: 0

Electrical Properties, Strength, and Structure of VK94-1 Ceramics Produced Using Spray Drying of Highly Concentrated Suspension 高浓度悬浮液喷雾干燥制备VK94-1陶瓷的电性能、强度和结构

IF 0.7 4区材料科学

Inorganic Materials Pub Date : 2025-06-30 DOI: 10.1134/S0020168525700360

I. E. Golubeva, A. I. Sitnikov, A. A. Atapin, A. N. Gordienko, T. Yu. Kolomiets, A. A. Konovalov, A. V. Shokod’ko, K. A. Solntsev

{"title":"Electrical Properties, Strength, and Structure of VK94-1 Ceramics Produced Using Spray Drying of Highly Concentrated Suspension","authors":"I. E. Golubeva, A. I. Sitnikov, A. A. Atapin, A. N. Gordienko, T. Yu. Kolomiets, A. A. Konovalov, A. V. Shokod’ko, K. A. Solntsev","doi":"10.1134/S0020168525700360","DOIUrl":"10.1134/S0020168525700360","url":null,"abstract":"We have studied the electrical properties, strength, and structure of a ceramic material having the same composition as the commercially available VK94-1 ceramic. Ceramic samples have been prepared using a novel technological approach involving spray drying of a highly concentrated aqueous suspension of a mineral powder mixture with the VK94-1 composition, compaction of the resultant granulate by a combination of uniaxial semidry pressing and cold isostatic pressing, and subsequent sintering of the green compacts in air. The improved performance parameters of the materials studied are due to the good rheological properties of the granulate, which ensure an increased density of the green compacts and sintered material with a microcrystalline structure. The following properties of the material, superior to those of the commercially available VK94-1 ceramic, have been achieved: relative density, 98.7%; bending strength, 380–420 MPa, grain size in the structure of the sintered material, 1–5 μm; dielectric permittivity, 9.7; dielectric loss tangent, 3.4 × 10–4; and volume resistivity, 5.3 × 1014 Ω cm. The ceramic produced in this study can be recommended as a material for special-purpose dielectric parts.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"60 15","pages":"1619 - 1632"},"PeriodicalIF":0.7,"publicationDate":"2025-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-Propagating High-Temperature Synthesis of Compositions in the Si3N4–Yb2O3 System Si3N4-Yb2O3体系中组分的自传播高温合成

IF 0.7 4区材料科学

Inorganic Materials Pub Date : 2025-06-30 DOI: 10.1134/S0020168525700323

V. V. Zakorzhevskii, I. A. Shibakov, I. D. Kovalev, N. I. Mukhina

引用次数: 0

Prospects for Using Biomaterials Based on Magnesium Phosphates for Bone Tissue Repair 使用基于磷酸镁的生物材料修复骨组织的前景

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-22 DOI: 10.1134/S0020168524701620

I. I. Preobrazhenskiy, E. S. Klimashina, Ya. Yu. Filippov, P. V. Evdokimov, V. I. Putlyaev

引用次数: 0

Impact Treatment of the Surface of Oxygen-Free Copper with Nanosecond Laser Pulses in Water 纳秒激光脉冲对水中无氧铜表面的冲击处理

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-18 DOI: 10.1134/S0020168524701437

V. Yu. Zheleznov, T. V. Malinskiy, S. I. Mikolutskiy, V. E. Rogalin, Yu. V. Khomich, V. A. Yamshchikov, A. A. Sergeev, S. V. Ivakin, I. A. Kaplunov, A. I. Ivanova

引用次数: 0

Electrochemical Performance of MnO2/C Electrodes in Neutral Aqueous Electrolytes MnO2/C电极在中性水溶液中的电化学性能

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-18 DOI: 10.1134/S002016852470136X

V. V. Chernyavina, A. G. Berezhnaya, Ya. A. Dyshlovaya

引用次数: 0

Formation of Layered Sulfide–Hydroxide (Valleriite) Materials under Hydrothermal Conditions 水热条件下层状氢氧化硫（钒长石）材料的形成

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-18 DOI: 10.1134/S0020168524701383

R. V. Borisov, M. N. Likhatski, S. A. Vorobyev, A. M. Zhizhaev, E. V. Tomashevich

{"title":"Formation of Layered Sulfide–Hydroxide (Valleriite) Materials under Hydrothermal Conditions","authors":"R. V. Borisov, M. N. Likhatski, S. A. Vorobyev, A. M. Zhizhaev, E. V. Tomashevich","doi":"10.1134/S0020168524701383","DOIUrl":"10.1134/S0020168524701383","url":null,"abstract":"This paper examines processes underlying the formation of layered materials, analogs of the natural mineral valleriite, CuFeS2·1.53[(Mg,Al)(OH)2], made up of alternating two-dimensional sulfide and hydroxide layers, under hydrothermal conditions. The synthesized materials have been characterized by X-ray diffraction, scanning and transmission electron microscopies, X-ray photoelectron spectroscopy, and laser diffraction. The results demonstrate that the formation of valleriite phase at 160°C in an autoclave proceeds through the formation and subsequent consumption of reaction intermediates: erdite (NaFeS2·2H2O), haycockite (Cu4Fe5S8), and chalcopyrite (CuFeS2). The formation of phase-pure valleriite has been shown to occur at a hydrothermal treatment time from 25 to 70 h, whereas shorter or longer treatment times lead to contamination of the reaction product with impurity phases. The nature of the anion in the starting materials (({text{SO}}_{4}^{{2 - }}) or ({text{NO}}_{3}^{ - })) has been shown to have little or no effect on characteristics of the synthesis product. The use of thiourea as a sulfur source instead of sodium sulfide makes it possible to obtain valleriite phase contaminated only slightly with spherical magnesium carbonate particles. Our results demonstrate that, under hydrothermal conditions, equilibrium in the formation of the material can be reached if chalcopyrite phase is used as a precursor of 2D valleriite layers.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"60 9","pages":"1063 - 1073"},"PeriodicalIF":0.9,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polymetallic Medium-Entropy System Fe–Ni–Co–Cu Prepared via Galvanic Replacement 电替换法制备Fe-Ni-Co-Cu多金属中熵体系

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-18 DOI: 10.1134/S0020168524701395

A. F. Dresvyannikov, M. E. Kolpakov, E. A. Ermolaeva

引用次数: 0

Chemical Interaction in the Li+,Na+,K+||F–,Br– System and Identification of Low-Melting-Point Phase Fields in a 3D Model of the Stable Composition Triangle LiF–NaF–KBr Li+,Na+,K+||F -，Br -体系中的化学相互作用及低熔点相场在稳定组成三角形LiF-NaF-KBr三维模型中的识别

IF 0.9 4区材料科学

Inorganic Materials Pub Date : 2025-03-18 DOI: 10.1134/S0020168524701358

A. V. Burchakov, U. A. Emel’yanova, I. K. Garkushin, E. M. Dvoryanova, A. A. Finogenov

{"title":"Chemical Interaction in the Li+,Na+,K+||F–,Br– System and Identification of Low-Melting-Point Phase Fields in a 3D Model of the Stable Composition Triangle LiF–NaF–KBr","authors":"A. V. Burchakov, U. A. Emel’yanova, I. K. Garkushin, E. M. Dvoryanova, A. A. Finogenov","doi":"10.1134/S0020168524701358","DOIUrl":"10.1134/S0020168524701358","url":null,"abstract":"Alkali halides have found wide application as thermal energy storage materials, electrolytes for electrochemical cells, and solvents of inorganic substances. Modeling with the use of data for bounding systems is important for constructing phase diagrams of ternary and multicomponent systems. Using three-dimensional vector graphics software, we have constructed a 3D model of equilibrium phase states in the pseudoternary system LiF–NaF–KBr, which is a stable composition triangle in the quaternary reciprocal system Li+,Na+,K+||F–,Br–. Based on the 3D model, we have constructed for the first time polythermal and crystallization polytherm. For two polythermal sections, we have demonstrated the presence of regions of limited sodium fluoride-based solid solutions and liquid miscibility gaps and identified the phase crystallization sequence. In the 620°C isothermal section, we have delineated liquid-phase and two- and three-phase fields. The polytherm comprises three crystallization fields: terminal solid solutions based on sodium fluoride, potassium bromide, and lithium fluoride, in which a liquid miscibility gap has been delineated. The stability of the LiF–NaF–KBr composition triangle has been confirmed by thermodynamic calculations for several temperatures of interaction in mixtures of substances in the unstable composition triangle LiBr–NaF–KF. The crystallization polytherm allows one to choose mixtures in the temperature ranges 625–650 and 625–700°C suitable for practical application as melting electrolytes of intermediate-temperature electrochemical cells and molten solvents of inorganic substances.","PeriodicalId":585,"journal":{"name":"Inorganic Materials","volume":"60 9","pages":"1101 - 1108"},"PeriodicalIF":0.9,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143645387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0