International Journal of Self-Propagating High-Temperature Synthesis最新文献_第4页

Pressure-Assisted Electrothermal Explosion of Titanium Nickelide 压力辅助下的镍化钛电热爆炸

IF 0.5

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-01-18 DOI: 10.3103/S1061386223040039

Yu. V. Bogatov, A. V. Shcherbakov, V. A. Shcherbakov

引用次数: 0

Controlled Oxidant-to-Fuel Ratios for Synthesis of Inorganic Hematite Pigment (α-Fe2O3) Using Solution Combustion Method with 6-Aminohexanoic Acid as Fuel 以 6-Aminohexanoic Acid 为燃料，采用溶液燃烧法合成无机赤铁矿颜料 (α-Fe2O3) 的氧化剂与燃料比率控制研究

IF 0.5

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-01-18 DOI: 10.3103/S1061386223040040

E. A. Chavarriaga, A. A. Lopera, J. Alarcón

引用次数: 0

Synthesis of Ti–5Al–2.5Fe Alloy and Its Hydride by HC and SHS Methods 用 HC 和 SHS 方法合成 Ti-5Al-2.5Fe 合金及其氢化物

IF 0.5

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-01-18 DOI: 10.3103/S1061386223040088

D. Mayilyan, A. Aleksanyan

{"title":"Synthesis of Ti–5Al–2.5Fe Alloy and Its Hydride by HC and SHS Methods","authors":"D. Mayilyan, A. Aleksanyan","doi":"10.3103/S1061386223040088","DOIUrl":"10.3103/S1061386223040088","url":null,"abstract":"The aim of this investigation was to synthesis Ti–5Al–2.5Fe alloy by “hydride cycle” (HC) method. The crystal structure of obtained alloy was studied by powder X-ray diffraction. It was found that the alloy was a near α-alloy containing main α phase (hexagonal close-packed structure, space group 194: P63/mmc) and small amount of β phase (body-centered cubic structure, space group 229: Im-3m). The microstructure of obtained materials was studied using scanning electron microscope (SEM) in a back-scattered electron (BSE) mode. On the SEM image of the synthesized compacted alloy no cracks and pores were observed. The SEM measurements showed that the particles synthesized hydride have size distribution in the range of 1–10 μm. Energy dispersive X-ray spectrometry (EDS) analysis showed that the chemical compositions of observed main grey phase were close to the nominal composition of Ti–5Al–2.5Fe α-phase. The hydride of Ti–5Al–2.5Fe alloy was synthesized by self-propagating high temperature synthesis (SHS) method. It was shown that Ti–5Al–2.5Fe tablets reacted with hydrogen without preliminary crushing in SHS mode at range of hydrogen pressure P(H2) = 1–2.5 MPa. Hydrogen capacity of synthesized (Ti–5Al–2.5Fe)H1.45 hydride was equal to 3.04 wt %. The density of synthesized alloy before (ρ1 = 4.0487 g/cm3) and after (ρ2 = 4.2511 g/cm3) the repeating of hydrogenation–dehydrogenation cycle was measured. It was found that as a result of cycle the density of sample was increased by 5%.","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"32 4","pages":"264 - 270"},"PeriodicalIF":0.5,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139498462","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}

引用次数: 0

Combustion of Inhomogeneous Titanium + Carbon Black Powder Mixture 非均质钛+炭黑粉末混合物的燃烧

IF 0.5

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-01-18 DOI: 10.3103/S1061386223040064

S. V. Kostin, P. M. Krishenik

引用次数: 0

Combustion Synthesis and Characterization of Ultra-High-Temperature NbB2–HfB2 Solid Solutions 超高温 NbB2-HfB2 固溶体的燃烧合成与表征

IF 0.5

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-01-18 DOI: 10.3103/S1061386223040143

V. V. Kurbatkina, E. I. Patsera, T. A. Sviridova, N. A. Kochetov, E. A. Levashov

{"title":"Combustion Synthesis and Characterization of Ultra-High-Temperature NbB2–HfB2 Solid Solutions","authors":"V. V. Kurbatkina, E. I. Patsera, T. A. Sviridova, N. A. Kochetov, E. A. Levashov","doi":"10.3103/S1061386223040143","DOIUrl":"10.3103/S1061386223040143","url":null,"abstract":"This paper presents an in-depth study on the combustion synthesis, solid-solution formation, processing, and characterization of NbB2–HfB2 ceramics, aiming to explore their potential applications, particularly in industries requiring high-performance materials. We conducted macrokinetic measurements and fitted regression models to predict combustion temperature and velocity for compositions ranging from 50 to 100% HfB2. A combined method of ball milling and hot pressing was developed for processing the combustion products into dense ceramics. These methods resulted in samples with relative densities reaching 97%, hardness of up to 34 GPa, and Young’s modulus of up to 530 GPa, with NbB2–50% HfB2 solid solution exhibiting the best mechanical properties. The study revealed a linear increase in thermal properties and density with the rise in HfB2 content. The thermal conductivity of the solid solutions in the Nb–Hf–B system ranged from 34 to 40 W/mK and was found to increase with temperature, making these ceramics suitable for ultra-high-temperature applications. The findings have significant implications for aerospace and high-performance engineering sectors and provide a solid foundation for further investigation of Nb–Hf–B ceramics under real-world operational conditions.","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"32 4","pages":"313 - 325"},"PeriodicalIF":0.5,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139498463","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}

引用次数: 0

Preparation of Molybdenum–Copper Pseudoalloy 制备钼铜伪合金

IF 0.5

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-01-18 DOI: 10.3103/S106138622304012X

V. Yu. Barinov, A. V. Shcherbakov

引用次数: 0

Hydrogenation of CO2 on Co–Ni Catalysts Produced by Low-Temperature Combustion Using Modified Silica Fabric 使用改性二氧化硅织物低温燃烧制备的 Co-Ni 催化剂上的 CO2 加氢反应

IF 0.5

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-01-18 DOI: 10.3103/S1061386223040131

V. N. Borshch, I. M. Bystrova, E. V. Pugacheva, N. Yu. Khomenko

{"title":"Hydrogenation of CO2 on Co–Ni Catalysts Produced by Low-Temperature Combustion Using Modified Silica Fabric","authors":"V. N. Borshch, I. M. Bystrova, E. V. Pugacheva, N. Yu. Khomenko","doi":"10.3103/S1061386223040131","DOIUrl":"10.3103/S1061386223040131","url":null,"abstract":"Co–Ni supported catalysts were prepared by low-temperature combustion of dried mixture of solutions of cobalt and nickel nitrates and urea after impregnation of silica fabric (>97% SiO2) premodified with 5, 10, and 15 wt % Al2O3. Modification of support was carried out by low-temperature combustion of dried mixture of solutions of aluminum nitrate and urea. Prepared supports and related catalysts were characterized by XRD, SEM, EDS, and BET method. The unreduced catalysts were found to contain oxides and complex oxides of nickel and cobalt. Reduction of catalysts with hydrogen at 400°C for 1 h was shown to contribute to forming metallic phases of Co and Ni; however, the nickel phase was detected only in reduced catalyst on unmodified fabric. The catalytic activity of catalysts was determined in the temperature range of 150–400°С. It was found that the reduced catalyst on support modified with 5 wt % Al2O3 possesses the highest CO2 conversion (61.8%) and methane yield (3.61 vol %) at 400°С.","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"32 4","pages":"302 - 312"},"PeriodicalIF":0.5,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139498470","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}

引用次数: 0

Production of NiTi Alloys by MA–SHS Consolidation 通过 MA-SHS 固结法生产镍钛合金

IF 0.5

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-01-18 DOI: 10.3103/S1061386223040027

Yu. V. Bogatov, V. A. Shcherbakov

引用次数: 0

Solution Combustion Synthesis of ZnO Undoped and Doped with Fe, Co, Cu, and Mg Using Citric Acid as a Fuel for Photocatalytic Decomposition of Phenol 以柠檬酸为燃料，溶液燃烧合成未掺杂和掺杂铁、钴、铜和镁的氧化锌，用于光催化分解苯酚

IF 0.5

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-01-18 DOI: 10.3103/S1061386223040118

A. P. Amosov, V. A. Novikov, E. M. Kachkin, N. A. Kryukov, A. A. Titov, I. M. Sosnin, D. L. Merson

{"title":"Solution Combustion Synthesis of ZnO Undoped and Doped with Fe, Co, Cu, and Mg Using Citric Acid as a Fuel for Photocatalytic Decomposition of Phenol","authors":"A. P. Amosov, V. A. Novikov, E. M. Kachkin, N. A. Kryukov, A. A. Titov, I. M. Sosnin, D. L. Merson","doi":"10.3103/S1061386223040118","DOIUrl":"10.3103/S1061386223040118","url":null,"abstract":"The solution combustion synthesis (SСS) was used to prepare ZnO from mixtures of solutions of zinc nitrate (oxidizer) and citric acid (fuel) with different fuel-to-oxidizer ratio, as well as for doping ZnO with one of the elements Fe, Co, Cu, and Mg whose concentration was 0.1, 0.3, 1, 3, 10, and 15 wt % when adding corresponding doping element nitrate to the reagent mixture. Combustion characteristics (ignition delay time, combustion duration, coefficient of product mass conservation), composition, and structure of combustion products were studied. It was shown that the content of carbon impurities in the combustion product can be reduced from 8–30 to 1 wt % as a result of calcination for 1 h at 650°C. Calcinated and attrition-ground ZnO powder consisting of individual highly dispersed (<1 µm) nano-sized and submicron ZnO particles with an average crystallite size of 40 nm and sintered porous agglomerates ranging in size from 0.2 to 100 µm was found to exhibit high photocatalytic activity in the decomposition of phenol under ultraviolet irradiation. Doping ZnO with elements Fe, Co, and Cu decreased the photocatalytic activity, and only doping with 1 wt % Mg markedly increased it. However, both undoped and doped ZnO were not effective in photocatalytic decomposition of phenol under visible light.","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"32 4","pages":"288 - 301"},"PeriodicalIF":0.5,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139498648","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}

引用次数: 0

Preparation of Mo–Si–B Alloy via Centrifugal SHS of MoO3/Al/Si/B/Al2O3 mixture: Effect of Al 通过 MoO3/Al/Si/B/Al2O3 混合物的离心 SHS 制备 Mo-Si-B 合金：Al

IF 0.5

International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2024-01-18 DOI: 10.3103/S1061386223040179

Yu. S. Vdovin, D. E. Andreev, V. I. Yukhvid, O. D. Boyarchenko

引用次数: 0