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International Journal of Self-Propagating High-Temperature Synthesis最新文献

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Features of High-Temperature Synthesis of Cu–Al–Ag Eutectic Alloy: Microstructure and Electrophysical Properties 高温合成Cu-Al-Ag共晶合金的特点：显微组织和电物理性能
IF 0.6
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2025-06-23 DOI: 10.3103/S1061386225700098
O. D. Boyarchenko, S. G. Vadchenko, A. V. Karpov, A. E. Sytschev
{"title":"Features of High-Temperature Synthesis of Cu–Al–Ag Eutectic Alloy: Microstructure and Electrophysical Properties","authors":"O. D. Boyarchenko,&nbsp;S. G. Vadchenko,&nbsp;A. V. Karpov,&nbsp;A. E. Sytschev","doi":"10.3103/S1061386225700098","DOIUrl":"10.3103/S1061386225700098","url":null,"abstract":"<p>The features of high-temperature interaction between the eutectic Cu–Ag |alloy and the Al melt were studied. It was shown that Cu–Ag–Al alloy represents Cu<sub>3</sub>Al<sub>2</sub> dendrites in Ag(Al,Cu) eutectic matrix. The specific electrical resistance of sintered composite was 31.4 × 10<sup>–8</sup> Ω m, its temperature coefficient of resistance was 3.25 × 10<sup>–3</sup> K<sup>–1</sup>.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"34 2","pages":"133 - 138"},"PeriodicalIF":0.6,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168973","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
Solid-State Self-Propagating Combustion Synthesis of Surface Oxidized Copper Nanoparticles and Specific Capacitance Studies 固体自传播燃烧合成表面氧化铜纳米颗粒及其比电容研究
IF 0.6
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2025-06-23 DOI: 10.3103/S1061386225700013
R. Sudarshana, R. Sambasivam, M. Prakash, B. Divyashree, R. Balan
{"title":"Solid-State Self-Propagating Combustion Synthesis of Surface Oxidized Copper Nanoparticles and Specific Capacitance Studies","authors":"R. Sudarshana,&nbsp;R. Sambasivam,&nbsp;M. Prakash,&nbsp;B. Divyashree,&nbsp;R. Balan","doi":"10.3103/S1061386225700013","DOIUrl":"10.3103/S1061386225700013","url":null,"abstract":"<p>In this study, surface-oxidized copper nanoparticles were synthesized through a time and energy-efficient solid-state self-propagating combustion (SSPC) reaction by making use of sodium borohydride (NaBH<sub>4</sub>) and calcium carbonate (Cu<sub>2</sub>(CO<sub>3</sub>)(OH)<sub>2</sub>). The microstructure, phase composition, and crystalline structure were examined using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM) studies. XRD and XPS analyses confirmed the formation of crystalline copper (Cu) and Cu<sub>2</sub>O. The percentages of Cu<sub>2</sub>O and Cu were calculated to be 13 and 87%, respectively; based on the XRD peak profile. TEM studies confirmed that the Cu nanoparticles (CuNPs) were surface oxidized with a Cu<sub>2</sub>O layer of thickness 3–5 nm. Electrochemical studies using a three-electrode setup in a 1 M KOH aqueous solution demonstrated a specific capacitance of 144.44 F/g at 0.15 A/g.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"34 2","pages":"81 - 88"},"PeriodicalIF":0.6,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168322","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
Direct Nitriding of Iron Powder by means of Chemical Oven Technique 化学炉法直接氮化铁粉
IF 0.6
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2025-06-23 DOI: 10.3103/S1061386225700037
T. V. Barinova, E. I. Volchenko, G. R. Nigmatullina, M. I. Alymov
{"title":"Direct Nitriding of Iron Powder by means of Chemical Oven Technique","authors":"T. V. Barinova,&nbsp;E. I. Volchenko,&nbsp;G. R. Nigmatullina,&nbsp;M. I. Alymov","doi":"10.3103/S1061386225700037","DOIUrl":"10.3103/S1061386225700037","url":null,"abstract":"<p>Direct nitriding of spherical microparticles of carbonyl iron powder was carried out by means of chemical oven technique. Experimental selection of highly exothermic mixtures (“chemical ovens”) and nitrogen-containing additives was realized. It was shown that the nitriding products contain Fe<sub>3</sub>N<sub><i>x</i></sub> where <i>x</i> ranges from 0.93 to 1.15 as a basis and are represented by spherical core–shell particles where the core is iron and the shell consisting of sub-microcrystals includes Fe, Fe<sub>3</sub>C, and Fe<sub><i>x</i></sub>N (<i>x</i> = 3 and 4). According to XRD-Rietveld method calculations, the maximum yield of Fe<sub><i>x</i></sub>N was 66 wt %.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"34 2","pages":"89 - 94"},"PeriodicalIF":0.6,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168320","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
Synthesis of Titanium Carbonitride from a Granular Charge in a Constant Pressure Bomb 恒压弹中颗粒装药合成碳氮化钛
IF 0.6
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2025-06-23 DOI: 10.3103/S1061386225700050
B. S. Seplyarskii, N. I. Abzalov, R. A. Kochetkov, O. M. Miloserdova, T. G. Lisina
{"title":"Synthesis of Titanium Carbonitride from a Granular Charge in a Constant Pressure Bomb","authors":"B. S. Seplyarskii,&nbsp;N. I. Abzalov,&nbsp;R. A. Kochetkov,&nbsp;O. M. Miloserdova,&nbsp;T. G. Lisina","doi":"10.3103/S1061386225700050","DOIUrl":"10.3103/S1061386225700050","url":null,"abstract":"<p>Titanium carbonitride was synthesized for the first time in a closed reactor (constant pressure bomb) from granular mixtures Ti + 0.5C and TiC + Ti. Changes in sample mass, titanium carbide particle size, and granule size had a weak effect on the phase composition of the product. As in the case of synthesis of powder charge, the determining factor for increasing the nitrogen content in titanium carbonitride was an increase in nitrogen pressure. Chemical analysis showed that the product obtained from Ti + 0.5C granular mixture at a pressure of 16 atm contains 5.1% nitrogen, which is close to 6% in titanium carbonitride synthesized from bulk-density powder charge. Replacing Ti + 0.5C with TiC + Ti led to an increase in the nitrogen content to 9% for both granular and powder mixtures. Thus, the nitrogen content in products synthesized in a constant pressure bomb at 4–16 atm was independent of green mixture structure. According to XRD data, the product with composition close to TiC<sub>0.5</sub>N<sub>0.5</sub> was obtained from more massive TiC + Ti granular mixture, which is associated with a longer cooling time. In contrast to the synthesis from powder mixtures, titanium carbonitride granules were easily crushed into powders.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"34 2","pages":"101 - 106"},"PeriodicalIF":0.6,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168321","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
Synthesis, Structural, Electrical, and Dielectric Properties of Sm3+ Substituted Ni–Cu Ferrites Sm3+取代镍铜铁氧体的合成、结构、电学和介电性能
IF 0.6
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2025-06-23 DOI: 10.3103/S1061386225700104
S. M. Patil, S. S. Potdar, P. B. Belavi, B. K. Bammannavar, G. N. Chavan, S. A. Malladi, K. A. Thabaj, M. K. Rendale, L. R. Naik
{"title":"Synthesis, Structural, Electrical, and Dielectric Properties of Sm3+ Substituted Ni–Cu Ferrites","authors":"S. M. Patil,&nbsp;S. S. Potdar,&nbsp;P. B. Belavi,&nbsp;B. K. Bammannavar,&nbsp;G. N. Chavan,&nbsp;S. A. Malladi,&nbsp;K. A. Thabaj,&nbsp;M. K. Rendale,&nbsp;L. R. Naik","doi":"10.3103/S1061386225700104","DOIUrl":"10.3103/S1061386225700104","url":null,"abstract":"<p>The series of Sm<sup>3+</sup> substituted nickel copper ferrites, Ni<sub>0.5</sub>Cu<sub>0.5</sub>Sm<sub><i>x</i></sub>Fe<sub>2–<i>x</i></sub>O<sub>4</sub> with (<i>x</i> = 0.1, 0.2, and 0.3), was synthesized by standard double sintered ceramic technique. The phase analysis was characterized by X-ray diffraction studies, which confirmed the creation of single phase. Crystallite size was calculated by using Debye Scherer formula for high intensity peak and found to be in the range from 71 to 90 nm. Surface morphology was studied using a scanning electron microscope and no cluster was observed. The elemental composition of synthesized samples was verified by using energy dispersive spectroscopy and no other elements were detected in the ferrites. Owing to interatomic vibrations in tetrahedral and octahedral sites of present samples two absorption bands were formed which were detected from the spectrum produced by means of Fourier transform infrared spectroscopy. Conductivity of Sm substituted nickel copper ferrites was determined by studying the variation of DC resistivity of ferrites with the temperature. Maxwell–Wagner interfacial polarization in present samples was detected through the use of dielectric spectroscopy and declined when the applied frequency was raised. Dielectric characteristics such as change in dielectric constant, dielectric loss, and AC conductivity versus frequency were studied.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"34 2","pages":"139 - 145"},"PeriodicalIF":0.6,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145169002","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
Synthesis of Porous Co3O4 NPs by Solution Combustion: Influence of F/O Ratio on Morphology and Porosity 溶液燃烧合成多孔Co3O4 NPs: F/O比对形貌和孔隙率的影响
IF 0.6
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2025-06-23 DOI: 10.3103/S1061386225700074
M. Hashami, A. Imash, Z. Mansurov
{"title":"Synthesis of Porous Co3O4 NPs by Solution Combustion: Influence of F/O Ratio on Morphology and Porosity","authors":"M. Hashami,&nbsp;A. Imash,&nbsp;Z. Mansurov","doi":"10.3103/S1061386225700074","DOIUrl":"10.3103/S1061386225700074","url":null,"abstract":"<p>In this study, porous Co<sub>3</sub>O<sub>4</sub> nanoparticles (NPs) were synthesized through solution combustion synthesis (SCS) method. Precursor cobalt nitrate hexahydrate as the oxidizer and glycine as the fuel were used, focusing on the regular alterations to the fuel-to-oxidizer (F/O) ratio so as to achieve the desired characteristics of the produced nanoparticles in terms of their morphology and structure. XRD analysis confirmed the formation of spinel-phase Co<sub>3</sub>O<sub>4</sub> with an average crystallite size of approximately 40 nm. SEM imaging revealed an interconnected nanoporous structure with pore sizes ranging from 100 to 500 nm. Raman spectroscopy identified a strong F<sub>2</sub>g mode at 600 cm<sup>–1</sup>, corresponding to asymmetric stretching vibrations of oxygen atoms coordinated to tetrahedral cobalt ions. Co<sub>3</sub>O<sub>4</sub> NPs have been widely reported for their applications in catalysis, energy storage, and environmental remediation due to their superb electrochemical performance and stability. Through examining the effects of varied F/O ratios, this work aimed to extend the knowledge on how the synthesis parameters could be utilized to optimize the characteristics of Co<sub>3</sub>O<sub>4</sub> NPs towards advanced technological uses. The results will be significant for enhancing functional materials, catalysts and the creation of energy conversion and storage systems of the future.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"34 2","pages":"113 - 122"},"PeriodicalIF":0.6,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168972","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
Influence of Al/Ca Ratio on Synthesis of Mo–Si–B Alloy from MoO3/Al/Ca/Si/B/Al2O3 Mixture Al/Ca比对MoO3/Al/Ca/Si/B/Al2O3混合物合成Mo-Si-B合金的影响
IF 0.6
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2025-06-23 DOI: 10.3103/S1061386225700116
Yu. S. Vdovin, V. I. Yukhvid, I. D. Kovalev
{"title":"Influence of Al/Ca Ratio on Synthesis of Mo–Si–B Alloy from MoO3/Al/Ca/Si/B/Al2O3 Mixture","authors":"Yu. S. Vdovin,&nbsp;V. I. Yukhvid,&nbsp;I. D. Kovalev","doi":"10.3103/S1061386225700116","DOIUrl":"10.3103/S1061386225700116","url":null,"abstract":"","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"34 2","pages":"146 - 149"},"PeriodicalIF":0.6,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168974","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
Ignition, Combustion, and Gas Emission during Combustion of Fe3O4–Al–Ni Nanothermite Mixtures Fe3O4-Al-Ni纳米热剂混合物燃烧过程中的点火、燃烧和气体排放
IF 0.6
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2025-06-23 DOI: 10.3103/S1061386225700049
S. G. Vadchenko, S. Yu. Pereverzeva
{"title":"Ignition, Combustion, and Gas Emission during Combustion of Fe3O4–Al–Ni Nanothermite Mixtures","authors":"S. G. Vadchenko,&nbsp;S. Yu. Pereverzeva","doi":"10.3103/S1061386225700049","DOIUrl":"10.3103/S1061386225700049","url":null,"abstract":"<p>Gas emission taking place during combustion of Fe<sub>3</sub>O<sub>4</sub>–Al–Ni nanothermite mixtures with additives of multilayer carbon nanotubes was studied. Variation in released gas volume with pre-degassing temperature was analyzed. It was shown that the major portion of easily evaporated impurities and moisture is removed upon vacuum degassing of mixtures at 162°C. A two-stage ignition mode of mixtures was found, and their critical ignition temperatures were determined. The burning velocity varied from 10 mm/s for Ni + Al to 770 mm/s for Fe<sub>3</sub>O<sub>4</sub> + Al.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"34 2","pages":"95 - 100"},"PeriodicalIF":0.6,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167853","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
Self-Propagating High-Temperature Synthesis of Titanium Oxide Bronzes: Influence of Mechanical Activation 自传播高温合成氧化钛青铜：机械活化的影响
IF 0.6
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2025-06-23 DOI: 10.3103/S1061386225700062
I. A. Sologubova, M. K. Kotvanova
{"title":"Self-Propagating High-Temperature Synthesis of Titanium Oxide Bronzes: Influence of Mechanical Activation","authors":"I. A. Sologubova,&nbsp;M. K. Kotvanova","doi":"10.3103/S1061386225700062","DOIUrl":"10.3103/S1061386225700062","url":null,"abstract":"<p>M<sub><i>x</i></sub>TiO<sub>2</sub> (M = Li, Na, K, and Rb; 0 &lt; <i>x</i> &lt; 1) bronzes were prepared via self-propagating high-temperature synthesis (SHS) of mechanically activated and non-activated green mixtures containing TiO<sub>2</sub>, MI, and additive CuO + Ti as heat-generating agent. The influence of mechanical activation on the composition and structure of SHS products was studied. TEM investigations revealed the growth of the number of crystal defects after mechanical activation, in particular, the formation of edge dislocations in certain crystallographic directions, leading to an increase in the diffusion speed in the crystal. The beginning of mechanical activation was shown to be accompanied by the formation of unstable interstitial solid solutions without changing the crystal structure of TiO<sub>2</sub>. Prolonged grinding generated stable phases with higher content of intercalated atoms and individual structure, which acted as heterogeneous crystallization nuclei during SHS. According to Rietveld refinements preliminary mechanical activation favored a higher yield of target phases with a higher content of intercalated alkali metal ions.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"34 2","pages":"107 - 112"},"PeriodicalIF":0.6,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168323","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
Effect of Tantalum on Deformation Behavior of HfB2–SiC Ceramics at Elevated Temperatures 钽对HfB2-SiC陶瓷高温变形行为的影响
IF 0.6
International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2025-06-23 DOI: 10.3103/S1061386225700086
Yu. S. Pogozhev, A. Yu. Potanin, E. I. Patsera, E. A. Levashov, K. V. Petrovskaya, V. P. Vagin, E. A. Bogachev, A. N. Timofeev
{"title":"Effect of Tantalum on Deformation Behavior of HfB2–SiC Ceramics at Elevated Temperatures","authors":"Yu. S. Pogozhev,&nbsp;A. Yu. Potanin,&nbsp;E. I. Patsera,&nbsp;E. A. Levashov,&nbsp;K. V. Petrovskaya,&nbsp;V. P. Vagin,&nbsp;E. A. Bogachev,&nbsp;A. N. Timofeev","doi":"10.3103/S1061386225700086","DOIUrl":"10.3103/S1061386225700086","url":null,"abstract":"<p>The thermomechanical behavior of HfB<sub>2</sub>–SiC and (Hf<sub>0.8</sub>Ta<sub>0.2</sub>)B<sub>2</sub>–SiC ceramics hot-pressed from SHS-prepared powders was studied under compression tests at 1600 and 1800°C. The high-temperature strength for ceramics was found to reach 582–606 MPa. It was showed that ceramics based on (Hf,Ta)B<sub>2</sub> solid solution have higher plasticity as compared to samples based on HfB<sub>2</sub>, their deformation degree, ε = 0.027, is 2 times higher.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"34 2","pages":"123 - 132"},"PeriodicalIF":0.6,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145168324","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
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