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Detonation Spraying of Ni-Based Composite Coatings Reinforced by High-Entropy Intermetallic Particles
Metals. 2023. Vol. 13. No. 11. Article 1807.
Ostovari Moghaddam A., Shaburova N., Naseri M., Latfulina Y., Samodurova M., Krymsky V., Litvinyuk K.
Ni-based composite coatings reinforced by high-entropy intermetallic compounds (HEICs) were prepared by detonation spraying (DS) on low alloy steel substrates. To this end, first (Ti-Nb)(V-Cr-Ni-Fe) and Al3(TiZrNbCrHfTa) HEIC powders were fabricated by arc melting followed by ball milling. The as-milled HEIC powders were then employed as reinforcement particles to prepare Ni-7wt.% HEIC composite coatings. The average particle size of the (Ti-Nb)(V-Cr-Ni-Fe) and Al3(TiZrNbCrHfTa) HEIC powders were 18 and 35 µm, respectively, while the average particle size of the Ni powder was 56 µm. (Ti-Nb)(V-Cr-Ni-Fe) exhibited a single hexagonal C14 Laves phase in spite of Ti and Nb segregations. The XRD pattern of Al3(TiZrNbCrHfTa) indicated the presence of a tetragonal D022-type structure along with some minor CrTi and Cr5Al8 phases. The sprayed Ni-7wt.% FeNiCrV-TiNb and Ni-7wt.% Al3(TiZrNbCrHfTa) composite coatings retained crystal structures of the powder mixtures, suggesting proper thermal stability for both powders. The coatings exhibited a dense microstructure consisting of a lamellar microstructure with low porosity and sound bonding with the substrate. The microhardness of Ni-7wt.% FeNiCrV-TiNb (450 HV) was higher than that of Al3(TiZrNbCrHfTa) (338 HV), and it exhibited lower fluctuation than that of Ni-7wt.% Al3(TiZrNbCrHfTa). DS is an effective method to fabricate metal matrix composites reinforced by HEICs with a low level of porosity.
The Journal of Physical Chemistry Letters 2026 Vol. 17 No. 18 P. 5386–5394
We demonstrate and rationalize the effect of Au nanoparticles (NPs) on the hierarchical g-C3N4/CeO2 heterojunction. g-C3N4/CeO2 decorated with monodispersed plasmonic Au NPs was synthesized. Detailed analyses showed that CeO2 nanocubes and monodispersed Au NPs were evenly distributed over the 2D g-C3N4 surface, forming a robust interface enriched with abundant active sites. The structure enabled efficient separation of photogenerated charge ...
Added: May 16, 2026
Das A., Paul R., Sharma N. et al., Colloids and Surfaces A: Physicochemical and Engineering Aspects 2026 Vol. 728 P. 138830
Niobium-doped TiO2 (Nb-TiO2), demonstrates dual functionality as an efficient photocatalyst for dye degradation and a promising photoelectrocatalyst for water oxidation. Nb incorporation via a facile hydrothermal method was confirmed by XRD (Rietveld refinement), XPS, TEM, FT-IR, Raman, and BET analyses, indicating successful lattice doping and structural modification. Photocatalytic dye degradation experiments were conducted using a model ...
Added: May 16, 2026
Гущина В. А., / Series chemrxiv-2023-vpzhz-v2 "ChemRxiv". 2023.
All-inorganic perovskite CsPbBr3 and Cs4PbBr6 nanoparticles are being intensively studied due to their unique properties and wide range of applications; however, however, the nature of their optical properties is not yet fully understood due to the difficulty of synthesis of singlephase nanoparticles. In this article we describe the features of the synthesis of single-phase particles ...
Added: May 14, 2026
Гущина В. А., Mendeleev Communications 2025 Vol. 35 No. 2 P. 193–195
All-inorganic perovskite CsPbBr3 and Cs4PbBr6 nanoparticles are intensively studied for their unique optical properties, though synthesizing single-phase nanoparticles has posed challenges. Detailed synthesis method of CsPbBr3 and Cs4PbBr6 single-phase nanoparticles and their chemical and phase analysis are described. Distinctive optical characteristics, such as photoluminescence, optical band gap and the Urbach tail region, are revealed and explained within the current ...
Added: May 14, 2026
Гущина В. А., Physics of Complex Systems, Russia 2026 Vol. 7 No. 1 P. 3–15
Heterostructures based on ZnO nanorods and CsPbBr3 nanocrystals were investigated for their potential as semiconductor SERS substrates. We found that ZnO morphology governs the efficiency of interfacial energy transfer, leading to enhanced photoluminescence under 390 nm excitation and a noticeable reduction of the bandgap in the composites. Raman analysis revealed a pronounced intensity enhancement and ...
Added: May 14, 2026
Гущина В. А., Russian Journal of Inorganic Chemistry 2024 Vol. 69 No. 6 P. 940–948
Currently, ABX3 nanoparticles (NPs) based on lead halides attract the attention due to their unique optical properties and a wide range of applications. The preparation of NPs with lead as a partial or complete replacement is particularly interesting because of the toxicity of this chemical element and most of its compounds. In this study, we propose a ...
Added: May 6, 2026
Yasnitsky L., Голдобин М. А., Мезенцев А. С., Прикладная математика и вопросы управления 2025 № 2 С. 99–116
Представлен обзор современных методов и основанных на них программных
инструментах, применяемых для математического моделирования серийных производственных процессов с целью снижения брака и повышения качества производимых изделий. Перечисляются группы работ, нацеленных на обнаружение и классификацию дефектов, работ, в которых решаются задачи прогнозирования образования дефектов и определения значимости параметров, работ направленных на поиск
оптимального сочетания технологических параметров изготовления изделий, ...
Added: May 5, 2026
Morozov E. V., Demin A. S., Borovitskaya I. V. et al., Inorganic Materials: Applied Research 2026 Vol. 17 No. 3 P. 619–626
This article presents the results of experiments on the impact of powerful pulsed ion-plasma and
electron flows generated in the working chamber of the Plasma Focus PF-5M installation during each highvoltage
discharge on a model aluminum alloy B95. It is shown that the general characteristics of the alloy’s
damage upon exposure to pulsed flows of helium ions (HI) ...
Added: May 4, 2026
Pavlenko V. I., Bondarenko G.G., Cherkashina N. I. et al., Inorganic Materials: Applied Research 2026 Vol. 17 No. 2 P. 276–282
A composite material based on polyethylene, boron carbide (B4C), and bismuth oxide (Bi2O3) is
synthesized by the method of joint cryogenic milling of all components in liquid nitrogen environment followed
by pressing. The effect of cryogenic milling on the distribution of fillers in a composite is studied and
the prospects of using this method are assessed in comparison ...
Added: April 9, 2026
Черкашина Н. И., Павленко В. И., Bondarenko G. et al., Перспективные материалы 2026 № 4 С. 14–26
В данной работе представлен синтез гибкого полимерного композита для защиты от радиации на основе каучуковой матрицы и оксидов редкоземельных металлов, таких как Dy2O3 и Gd2O3, предназначенного для создания радиационно-защитных экранов и средств индивидуальной защиты. Исследованы его физико-механические характеристики: составы с добавлением оксида диспрозия имеют плотность от 1,31 до 2,44 г/см3, предел прочности при растяжении от ...
Added: April 2, 2026
Chowde Gowda C., Alexey Kartsev, Tiwari N. et al., Journal of Materials Chemistry C 2024 Vol. 12 No. 46 P. 18691–18703
Two-dimensional (2D) chromium telluride Cr2Te3 exhibits strong ferromagnetic ordering with high coercivity at low temperatures and paramagnetic behavior when approaching room temperature. The spin states of monolayer Cr2Te3 show ferromagnetic ordering in the ground state. In situ Raman analysis reveals a reversible structure transformation and hence proves ferromagnetic to paramagnetic transition during low-temperature heating cycles (0–25 °C). The magnetic ...
Added: March 16, 2026
Argunov E., Alexey I. Kartsev, Computational Materials Science 2024 Vol. 244 Article 113192
Magnetothermopower and giant magnetoresistance in spinel-type compound has attracted a lot of attention recently. Ab initio computations of the electronic structure and the Seebeck coefficient of the structure are reported. The mixed nature of magnetism was identified to be caused by the competition between ferromagnetic and anti-ferromagnetic impacts, with the corresponding determined exchanged parameters: meV, meV, meV. Seebeck coefficient and electrical conductivity of the compound in the temperature range of K along with its ...
Added: March 16, 2026
Xiao Y., Xue W., Xu N. et al., Rare Metals 2025 Vol. 44 No. 11 P. 8757–8768
Complete collection of target fluids and effective capture of biomolecules are essential when designing and fabricating sensor electrodes. Assembling a conductive metal–organic framework (MOF) film onto a high-surface-area porous aerogel to create a three-dimensional (3D) hierarchically ordered structure represented an effective strategy for fabricating sensor electrodes for body fluid detection. In this study, high-precision, confined ...
Added: March 2, 2026
Zhavoronok E. S., Lenkova K. A., Matrenina A. V. et al., Protection of Metals and Physical Chemistry of Surfaces 2025 Vol. 61 No. 5 P. 1231–1238
This study investigated two groups of surgical suture materials—nonabsorbable (polyethylene terephthalate,
polyamide, and silk) and absorbable (glycolic/lactic acid copolymer)—before and after accelerated aging. The analysis employed tensile strength testing, Fourier-transform infrared (FTIR) spectroscopy, and differential scanning calorimetry (DSC). Following domestic and international standards for polymer aging, the samples were subjected to the following initial accelerated aging ...
Added: February 19, 2026
Mehrabi-Kalajahi S., Vasigh S. A., Yousefi Bavili H. et al., Materials Advances 2026 Vol. 7 No. 2 P. 1127–1137
A series of monometallic catalysts, such as Fe3O4, CoO, NiO, and CuO, along with their entropy-stabilized nanoparticles [(Fe,Co,Ni,Cu)3O4 medium-entropy oxide (MEO)], were synthesized and subsequently utilized for the solvent-free and selective aerobic oxidation of benzyl alcohol when supported on graphene oxide (GO). The resulting nanocomposites underwent characterization through various techniques including X-ray diffraction (XRD), scanning electron ...
Added: February 18, 2026
Samoilova O., Pratskova S., Plotnikova P. et al., Materials Letters 2026 Vol. 403 Article 139506
Herein, the positive effect of Pt doping on the high-temperature oxidation of AlCoCrNiPt0.1 multi-principal element alloy (MPEA) is demonstrated. It is shown that platinum is not separated as a secondary phase; rather, it is dissolved in the solid solution phase. The studied alloy exhibited good resistance to high-temperature oxidation during a 100-hour isothermal holding at ...
Added: February 18, 2026
Mehrabi-Kalajahi S., Ostovari Moghaddam A., Vasigh S. A. et al., Industrial & Engineering Chemistry Research 2025 Vol. 64 No. 36 P. 17495–17506
The growing demand for noble metal-free heterogeneous catalysts in selective, solvent-free oxidation reactions faces a persistent challenge: balancing high activity with practical scalability. Addressing this gap, we present a scalable route for the synthesis of the (MnFeCuCoNi)3O4 high-entropy oxide (HEO) catalyst and its composite with reduced graphene oxide (HEO-rGO). Comprehensive characterizations, including X-ray diffraction (XRD), ...
Added: February 18, 2026
Petrakova N., Demina A., Zobkova Y. et al., Journal of Alloys and Compounds 2025 Vol. 1037 Article 181865
The hydroxyapatite powders with co-doping of Ca2+ with Na+ and Ce3+ were obtained by aqueous precipitation.
Co-doping was considered as a method of charge compensation in the cationic sublattice of the HA structure by
means of the 2Ca2+→Ce3+ + Me+ in order to maintain the stability of phase composition, improve the optical
and microstructural properties of the HA ...
Added: November 5, 2025
Ostovari Moghaddam A., Shaburova N. A., Mikhailov D. et al., Journal of Chemical Technology and Metallurgy 2025 Vol. 60 No. 4 P. 645–652
AlCoCrFeNi2.1 eutectic high entropy alloy (HEA)composite coatings reinforced by Al2O3 particles were prepared by detonation spraying (DS) on low alloy steel substrates. The effect of annealing at different temperatures on the microstructure and mechanical properties of the coatings was further studied. The as-deposited AlCoCrFeNi2.1 - 30 wt. % Al2O3 composite coating exhibited a dual-phase FCC+BCC ...
Added: August 29, 2025
Samoilova O., Pratskova S., Shaburova N. et al., Materials 2025 Vol. 18 No. 15 Article 3701
The microstructure, phase composition, and high-temperature oxidation resistance of Fe-free AlCoCrNiNb0.2 and AlCoCr0.5NiNb0.2 high-entropy alloys (HEAs) were investigated. In the as-cast HEAs, niobium was found to mainly release as a Laves phase in the interdendritic region, and its solubility in the dendrites of the BCC solid solution was about 2 at.%. Both samples exhibited parabolic behavior during ...
Added: August 29, 2025
Ostovari Moghaddam A., Shaburova N., Abdollahzadeh A. et al., Journal of Alloys and Compounds 2025 Vol. 1035 Article 181537
In this study, an off-stoichiometric boron-doped chemically complex intermetallic alloy with a dual phase ordered-L12/disordered-FCC structure was developed, which exhibited an outstanding combination of high strength and ductility. The superior mechanical properties were attributed to the synergistic features of dual-phase microstructure, increased antiphase boundary energy due to the multi-additions of Ti, Nb and Ta elements ...
Added: June 30, 2025
Nechvoglod O., Ostovari Moghaddam A., Pratskova S. et al., The Minerals, Metals & Materials Society 2025 Vol. 77 P. 1005–1028
This work provides an overview on the fabrication process, composition and properties of high-entropy alloy (HEA) coatings fabricated by electrodeposition. Special attention is paid to the effect of electrodeposition parameters and electrolyte composition on the microstructure, morphology, and mechanical/functional properties of the HEA coatings. It is demonstrated that the majority of researches has been focused ...
Added: June 10, 2025
Дудников Д. О., Коннов Э. А., Огурцов Н. А., Вестник Астраханского государственного технического университета. Серия: Управление, вычислительная техника и информатика 2025 Т. 2025 № 2 С. 69–75
Представлены современные подходы к автоматизации анализа микроструктуры металлических материалов, направленные на повышение точности и эффективности исследований. Описана разработка программного обеспечения для идентификации и классификации зерен в металлах, что является ключевым аспектом в изучении их структуры и прогнозировании механических свойств. Программа включает модули для частично автоматизированной обработки изображений, анализа характеристик зерен, визуализации результатов и интеграции с ...
Added: May 15, 2025
Shaburova N., Pashkeev I., Samoilova O. et al., COATINGS 2022 Vol. 13 No. 1 Article 70
Saturation diffusion with chromium has not been adequately studied among all the surface thermochemical treatment (STCT) processes of steels. Especially, the complex saturation behavior when several elements are added directly for chemical treatment needs to be systematically studied. This work aims at determining the effect of V, Mo, and Co on the parameters of chromium ...
Added: February 18, 2025