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Information × Registration Number 0224U033372, (0123U102977) , R & D reports Title Structure and properties of high-entropy alloys AlCr0.5FeCo1.75Ni3W0.5TixBy and electrospark coatings based on them. popup.stage_title Визначення зносостійкості отриманих покриттів при різних умовах навантаження. Проведення випробовувань на жаростійкість, та дослідження фазоутворення при окисненні покриттів AlCr0.5FeCo1.75Ni3W0.5Ti0,5 та AlCr0.5FeCo1.75Ni3W0.5Ti0,8B0,6. Узагальнення результатів досліджень по фазоутворенню, зносо та корозійній стійкості високоентропійних сплавів AlCr0.5FeCo1.75Ni3W0.5Ti0,5 та AlCr0.5FeCo1.75Ni3W0.5Ti0,8B0,6 та покриттів на їх основі. Head Myslyvchenko Oleksandr M., Кандидат технічних наук Registration Date 25-12-2024 Organization Frantsevich Institute for Problems of Materials Science National Academy of Science of Ukraine popup.description1 The goal of the project is to obtain wear- and heat-resistant high-entropy AlCr0.5FeCo1.75Ni3W0.5TixBy alloys and electrospark coatings based on them. The project is aimed at creating highly effective wear- and heat-resistant materials and coatings for the protection of machine parts. Complex experimental work planned as part of the project is aimed at comparing phase formation in cast alloys and coatings based on them and provides for the optimization of coating application regimes. popup.description2  During the work, the AlCr0,5FeCo1,75Ni3W0,5Ti0,8B0,6 coating on the St3sp steel substrate was treated with a laser and examined. The wear resistance of the coatings under quasi-static and dynamic loading conditions was determined and the influence of laser processing and indenter material on wear resistance was investigated. The scale resistance of the investigated coatings was compared. X-ray analysis has established that after laser treatment the phase composition of the coating undergoes significant changes, namely: the content of BСС solid solution increases significantly, and the diffraction maxima from boride disappear. The surface hardness of the laser-treated coating is 11 GPa. Wear resistance testing was performed for two different counterbody materials, Si3N4 and WC-6%Co, using quasi-static and dynamic loading modes. For all types of indentors and coatings, wear in the dynamic loading mode exceeds wear in the quasi-static mode. Among all the indentors tested, the lowest wear values under both loading modes were recorded for the laser-treated sample. After oxidation testing, it was found that Fe2O3 and Fe3O4 oxides are formed on the surface of the studied coatings. The best scale resistance is provided by the AlCr0,5FeCo1,75Ni3W0,5Ti0,8B0,6 coating, on the surface of which the dominant phase is Fe2O3. Its content decreases as it approaches the substrate and a mixture of FeO and Fe3O4 oxides is formed there. Product Description popup.authors Ivanchenko Serhii E. Myslyvchenko Oleksandr M. popup.nrat_date 2024-12-25 Close