{"title":"Effect of Mixing Conditions on Impurity Composition and Combustion Parameters of Ti + C Mixtures","authors":"Yu. V. Bogatov, V. A. Shcherbakov","doi":"10.3103/S1061386226700056","DOIUrl":"10.3103/S1061386226700056","url":null,"abstract":"<p>This study examines the influence of mechanical activation (MA) and initial titanium powder properties on forced self-propagating high-temperature synthesis (SHS) compaction of Ti–C mixtures. MA of pure titanium powder substantially elevated its oxygen content from 0.3 to 2.0 wt %, whereas Ti + C mixtures exhibited minimal uptake (∼0.2–0.3 wt %) due to carbon black occlusion of titanium surface defects, enhancing reagent contact while inhibiting atmospheric oxidation. Ignition and combustion temperatures rose with oxygen concentration in titanium, independent of Ti–C interfacial area; however, burning velocity correlated directly with this area, increasing with MA time and declining with surface oxygen levels.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"35 2","pages":"137 - 142"},"PeriodicalIF":0.6,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148011887","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}
A. Zurnachyan, A. Ginosyan, A. Kharatyan, S. Aydinyan
{"title":"Microstructural Evolution in TiC-Reinforced Entropy-Stabilized Alloys","authors":"A. Zurnachyan, A. Ginosyan, A. Kharatyan, S. Aydinyan","doi":"10.3103/S1061386226600030","DOIUrl":"10.3103/S1061386226600030","url":null,"abstract":"<p>TiC-reinforced entropy-stabilized composites were synthesized via self-propagating high-temperature synthesis (SHS) in the Ti–Mn–Co–Ni–Al–C system and consolidated using spark plasma sintering (SPS) technique. Thermodynamic analysis predicted an adiabatic temperature of 1830 K, while experimental SHS reached 1550°C with rapid heating (1720°C/s) and cooling (2.8°C/s) rates. X-ray diffraction identified titanium carbide, FCC Ti–Mn–Co–Ni alloy, and minor amount of Mn<sub>2</sub>Ti intermetallic compound after the combustion synthesis. SEM/EDS revealed a porous, sponge-like SHS microstructure with bimodal particle-size distribution, evolving into a dense, well-bonded composite after SPS, with fine TiC uniformly dispersed in the metallic matrix. The intrinsic reactivity of SHS powders made them particularly suitable for spark plasma sintering, enabling rapid densification while preserving the fine TiC reinforcement and the entropy-stabilized FCC metallic matrix.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"35 2","pages":"125 - 131"},"PeriodicalIF":0.6,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148011826","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}
H.-S. Kim, S.-J. Kim, J.-Y. Kim, C.-N. Sin, C.-H. Kwon, K.-H. Ham, R.-J. Kim
{"title":"Synthesis of Few-Layer Graphene via Solution Combustion Method from Sucrose","authors":"H.-S. Kim, S.-J. Kim, J.-Y. Kim, C.-N. Sin, C.-H. Kwon, K.-H. Ham, R.-J. Kim","doi":"10.3103/S1061386225600217","DOIUrl":"10.3103/S1061386225600217","url":null,"abstract":"<p>Solution combustion synthesis (SCS) to make few-layer graphene (FLG) from sucrose was demonstrated. Such a mass-producible and low-cost method is competitive as a candidate for industrial production of graphene. We used sucrose as a carbon source and ammonium nitrate as an oxidizing agent. The synthesized sample had a three-dimensional network and a porous structure with various kinds of sheets and sponge shapes, but after ultrasonication, it included lots of FLG. It was confirmed that the obtained production is highly defective and contains a large number of FLGs which don’t have enough bonding between them and can be easily separated. SEM, SPM, XRD, Raman, and BET analyses were carried out to confirm the characteristics of graphene, which prove ~5–8 layers of graphene. The mechanical properties of nitrile butadiene rubber–graphene (NBR@FLG) composites were investigated by adding the synthesized FLG to NBR. It was confirmed that the addition of 0.5 phr of FLG to NBR increases tensile strength by 2.49 times, elongation by 2.28 times, and hardness by 1.66 times.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"35 2","pages":"93 - 102"},"PeriodicalIF":0.6,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148011884","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}
A. Sargsyan, H. Kirakosyan, S. Aydinyan, S. Kharatyan
{"title":"Combustion-Synthesized Ferrimagnetic Spinel MnFe2O4 with Enhanced Magnetic Response","authors":"A. Sargsyan, H. Kirakosyan, S. Aydinyan, S. Kharatyan","doi":"10.3103/S1061386226600029","DOIUrl":"10.3103/S1061386226600029","url":null,"abstract":"<p>Manganese ferrite (MnFe<sub>2</sub>O<sub>4</sub>) is a technologically important soft ferrimagnetic spinel oxide with high saturation magnetization for magnetic and electronic devices. In this work, manganese ferrite (MnFe<sub>2</sub>O<sub>4</sub>) nanoparticles were synthesised by the solution combustion synthesis method using glycine as a reducing agent and the corresponding metal nitrates as oxidizers. By adjusting the fuel-to-oxidizer ratio, phase-pure manganese ferrite with a porous microstructure was obtained. In fuel-lean mixtures, the formation of Mn<sub>3</sub>O<sub>4</sub>, α-Fe<sub>2</sub>O<sub>3</sub>, and non-stoichiometric ferrites (Mn<sub>0.43</sub>Fe<sub>1.57</sub>)FeO and Mn<sub>0.202</sub>Fe<sub>0.798</sub>O was observed, whereas fuel-rich mixtures yielded single-phase manganese ferrite. Considering the minimal residual carbon content in the synthesized material (0.06%), 7 mol of glycine was selected as the optimal amount for obtaining the target material. The influence of glycine content on the combustion parameters was also investigated. Under optimal conditions, the combustion temperature reached 510°C and the combustion velocity was 0.71 cm s<sup>–1</sup>. Microstructural analysis revealed a porous, network-like structure with a uniform distribution of manganese ferrite nanoparticles of ferrimagnetic behaviour.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"35 2","pages":"117 - 124"},"PeriodicalIF":0.6,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148011883","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}
A. O. Sivakova, P. A. Lazarev, Yu. G. Morozov, A. E. Sytschev
{"title":"Self-Propagating High-Temperature Synthesis of Fe–Mn–Si Alloy: Structure and Magnetic Properties","authors":"A. O. Sivakova, P. A. Lazarev, Yu. G. Morozov, A. E. Sytschev","doi":"10.3103/S1061386226700032","DOIUrl":"10.3103/S1061386226700032","url":null,"abstract":"<p>Fe<sub>2</sub>Mn<sub>3</sub>Si<sub>3</sub>-based alloy with minor cubic Heusler Fe<sub>2</sub>MnSi phase was prepared for the first time via self-propagating high-temperature synthesis. The reaction initiated at 668°C, reaching a maximum of 1115°C, indicating high exothermicity driven by Fe–Mn interaction. Room-temperature magnetic properties showed weak ferromagnetism (coercive force of 42 Oe and and remanent magnetization of 0.20 emu/g), attributed to paramagnetism of Fe<sub>2</sub>MnSi and impurity-induced disordering in Fe<sub>2</sub>Mn<sub>3</sub>Si<sub>3</sub>.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"35 2","pages":"111 - 116"},"PeriodicalIF":0.6,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148011886","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}
S. L. Silyakov, Yu. N. Rozhkov, N. Yu. Khomenko, A. E. Sytschev
{"title":"Borosilicide Coating on Steel via Induction Boriding Using FeSix","authors":"S. L. Silyakov, Yu. N. Rozhkov, N. Yu. Khomenko, A. E. Sytschev","doi":"10.3103/S1061386226700068","DOIUrl":"10.3103/S1061386226700068","url":null,"abstract":"<p>Induction (high-frequency) boriding of steel was performed at ~1200°C using a novel combined charge of 30 wt % B<sub>4</sub>C + 70 wt % FeSi<sub><i>x</i></sub> (prepared via high-temperature synthesis of Fe<sub>2</sub>O<sub>3</sub>/Al/Si thermite mixture). The process conducted below melting points of charge components and substrate yielded 400–600 μm thick multiphase coatings. XRD analysis identified Fe<sub>2</sub>B, martensitic Fe<sub>1.93</sub>C<sub>0.07</sub>, and B(Fe,Si)<sub>3</sub> derived from silicon substitution in Fe<sub>3</sub>B structure. It was demonstrated that these silicide–boride phases achieve a significant hardening effect, with microhardness values between 8770 and 9980 MPa.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"35 2","pages":"143 - 145"},"PeriodicalIF":0.6,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148011838","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}
{"title":"Combustion Front Propagation in a Layered Ti–C–xCu System","authors":"S. G. Vadchenko","doi":"10.3103/S1061386226700019","DOIUrl":"10.3103/S1061386226700019","url":null,"abstract":"<p>Combustion wave dynamics were analyzed in a two-layer Ti–C–Cu system under SHS conditions. Utilizing equimolar Ti–C mixture with varying Cu amounts, the study showed that combustion temperatures surpassing the Cu liquidus drive interfacial metal migration and metallurgical welding. Variation in Cu content allowed for controlling the burning velocity, revealing that the refraction of the combustion wave front at the layer interface adheres to a relationship analogous to Snell’s law.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"35 2","pages":"71 - 75"},"PeriodicalIF":0.6,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148011888","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}
{"title":"SHS-Derived (CrTi)B2–NiMnAl Cast Composites for Protective Coating Fabrication","authors":"V. A. Gorshkov, P. A. Miloserdov","doi":"10.3103/S1061386226700020","DOIUrl":"10.3103/S1061386226700020","url":null,"abstract":"<p>Cast Ti–Cr boride composites with a Ni–Al–Mn binder were prepared via high-temperature synthesis to develop high-performance surfacing electrodes. It was revealed that the burning velocity and phase composition/microstructure of synthesized products are highly dependent on the initial reactor pressure and charge composition (CrO<sub>3</sub>/TiO<sub>2</sub>/Al/B<sub>2</sub>O<sub>3</sub>). A specific composite containing 15 wt % metallic binder—derived from a supplemental NiO–MnO<sub>2</sub>–Al mixture—was selected for electric arc surfacing applications. The resulting protective coatings achieved a hardness of 8000–9500 MPa, demonstrating wear characteristics superior to currently available commercial surfacing materials.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"35 2","pages":"86 - 92"},"PeriodicalIF":0.6,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148011837","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}
{"title":"Self-Propagating High-Temperature Synthesis of Porous Hollow β-SiAlON Cylinder","authors":"A. A. Reger, P. E. Vashurkin","doi":"10.3103/S1061386225600230","DOIUrl":"10.3103/S1061386225600230","url":null,"abstract":"<p>In this study, porous hollow cylinders based on β-SiAlON were produced via self-propagating high-temperature synthesis (SHS). The synthesis process involved two stages: (1) the preliminary structuring of a powder mixture of silicon, aluminum, and microsilica, with the incorporation of reinforcing basalt fibers into the porous reactive blanks, and (2) the nitridation of these blanks through SHS. The investigation examined the effect of the cylinder inner diameter on nitrogen content, burning velocity, maximum combustion temperature, porosity, gas permeability, compressive strength, and the phase composition of the products. The microstructure of the combustion products was also analyzed. For reaction blanks with an outer diameter of 90 mm, the combustion reaction could be initiated when the inner diameter was 50 mm or less. The porosity of the resulting β-SiAlON-based materials ranged from 49.5 to 51.8%, predominantly featuring open-type gas-permeable pores. Single-phase hollow cylinders were obtained using reaction blanks with the inner diameter of 20 mm or less. Increasing the inner diameter beyond 20 mm led to incomplete nitridation, as indicated by the multiphase composition of the resulting combustion products. As the inner diameter increased, the compressive strength of the combustion products decreased from 1.35 to 0.25 MPa.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"35 2","pages":"76 - 85"},"PeriodicalIF":0.6,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148011890","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}
A. R. Bobozhanov, S. G. Vadchenko, D. Yu. Kovalev, A. E. Sytschev, A. O. Sivakova, A. S. Rogachev, K. V. Kuskov
{"title":"Spark Plasma Sintering of CoCrNi–TiC Cermet","authors":"A. R. Bobozhanov, S. G. Vadchenko, D. Yu. Kovalev, A. E. Sytschev, A. O. Sivakova, A. S. Rogachev, K. V. Kuskov","doi":"10.3103/S1061386226700044","DOIUrl":"10.3103/S1061386226700044","url":null,"abstract":"<p>CoCrNi–TiC cermet was synthesized by spark plasma sintering, resulting in the formation of secondary chromium-rich (CoCrNi)<sub>3</sub>C<sub>2</sub> phase during consolidation. The cermet was found to exhibit a markedly enhancement in mechanical properties, achieving a Vickers hardness of 16 320 MPa compared to 2025–2332 MPa for CoCrNi, while preserving a fracture toughness of 8.12–10.60 MPa m<sup>1/2</sup>. This strengthening effect is directly attributed to the reinforcing role of TiC grains within the composite structure.</p>","PeriodicalId":595,"journal":{"name":"International Journal of Self-Propagating High-Temperature Synthesis","volume":"35 2","pages":"132 - 136"},"PeriodicalIF":0.6,"publicationDate":"2026-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148011827","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}