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Detonation Spraying Of AlCoCrFeNi2.1 Eutectic High Entropy Alloy Composite Coatings Reinforced By Al2O3 Particles
Journal of Chemical Technology and Metallurgy. 2025. Vol. 60. No. 4. P. 645–652.
Ostovari Moghaddam A., Shaburova N. A., Mikhailov D., Pashkeev K., Trofimova S., Rybin D., Samodurova M., Lezhnev S., Panin E., Trofimov E. A.
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 lamellar microstructure matrix with Al2O3reinforcement particles. The crystalline structure and lamellar microstructure of the coatings highly retained after annealing at 500°C and 800°C. However, a partial dissolution of BCC was noted after annealing. Moreover, annealing improved inter-diffusion and annihilated pores, therefore highly compensated the decline in microhardness due to strain relief effect of annealing. The as-deposited composite exhibited a microhardness value of 415 HV, which slightly decreased to about 409 HV and 403 HV after annealing at 500°C and 800°C, respectively. The microhardness values demonstrated low fluctuation over the thickness of the coatings.
Publication based on the results of:
Ostovari Moghaddam A., Mehrabi-Kalajahi S., Solizoda I. A. et al., Metals and Materials International 2026 P. 1–9
Off-stoichiometric boron-doped chemically complex intermetallic alloys (CCIMAs) have recently emerged as a new avenue for overcoming the low temperature brittleness of ordered superlattices. However, their behavior at high temperatures remains unexplored. In this study, a novel (Ni39.6Co29.3Cr10Al15.8Ta3.3Nb2)98.5B1.5 CCIMA was prepared and its oxidation resistance over a wide temperature range (500 °C–950 °C) was studied. The ...
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Piliugin L., Antropov A., Lobashev E. et al., Journal of Nuclear Materials 2026 Vol. 632 Article 156876
The effects of dislocations on the mobility of gas nanobubbles pinned to them are considered as novel unex- plored mechanisms of accelerated fission gas release and investigated using classical molecular dynamics of helium bubbles in FCC aluminum. Non-equilibrium methods are developed to calculate the mobility of a pinned bubble both along and across the dislocation ...
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Проведено сравнение, обобщение и систематизация механизмов эрозии и разрушения
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V – 10 Ti – 6 Cr – 0,05 Zr – 0,1 Si и вольфрама при последовательном воздействии на
них ионных и тепловых потоков. Тепловые потоки имитировали с помощью мощного
импульсного лазерного излучения (ЛИ), создаваемого ...
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Danil Kobtsev, Jarashneli A., Maman N. et al., Applied Sciences (Switzerland) 2026 Vol. 16 No. 17 Article 8577
AIVBVI semiconductors, particularly lead chalcogenides, remain key materials for mid-wave infrared (MWIR) photodetection due to their narrow bandgap and exceptional carrier transport properties. However, the realization of high-quality p-type PbTe thin films, suitable for p–n junction devices, remains a technological challenge. In this work, we report the fabrication of high-mobility p-type PbTe thin films grown on ...
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Сформулирована модель тлеющего газового разряда в смеси аргона и паров ртути при наличии
на поверхности катода тонкой диэлектрической пленки. Рассчитаны зависимости характеристик
разряда от температуры в интервале ее изменения, в котором заметный вклад в ионизацию
рабочей газовой смеси дает ионизация атомов ртути метастабильными возбужденными атомами
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Zirnik G., Ostovari Moghaddam A., Zhukov S. et al., Journal of Materials Science: Materials in Electronics 2026 Vol. 37 Article 738
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деградации подзатворного диэлектрика структур металл-диэлектрик-полупроводник (МДП)
с алюминиевым и поликремниевым затвором. Зарядовые явления в МДП-структурах
изучали методом сильнополевой инжекции электронов в диэлектрик в режиме возрастания
плотности стрессового инжекционного тока с кратковременными переключениями
в измерительный режим при постоянной низкой плотности инжекционного тока.
Использование данного метода позволило получить новые данные о процессах зарядовой
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Shaburova N., Pashkeev I., Samoilova O. et al., COATINGS 2022 Vol. 13 No. 1 Article 70
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Added: February 18, 2025
Samoilova O., Shaburova N., Samodurova M. et al., Journal of Thermal Spray Technology 2023 Vol. 32 No. 5 P. 1220–1229
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Added: February 18, 2025