Registration Number
0224U032970,
(0124U003353)
, R & D reports
Title
High performance FeAlCuNiTi-Based Metal Matrix Composites for High Temperature Applications
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Отримання армованого керамічного порошку B4C-TiB2. Іскро-плазмове спікання порошків ВЕС Fe32.3Al29.3Cu11.7Ni10.8Ti15.9 та композитів Fe32.3Al29.3Cu11.7Ni10.8Ti15.9-(В4С-ТіВ2) з різним вмістом армуючих частинок.
Head
Bogomol Yurii I., Доктор технічних наук
Registration Date
13-12-2024
Organization
National Technscal University of Ukraine "Kiev Polytechnic Institute".
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This project is aimed at developing an effective method for producing a particle-reinforced Fe32.3Al29.3Cu11.7Ni10.8Ti15.9 complex concentrated alloy (CCA) with a lower density compared to well investigated alloys of the Al-Co-Cr-Fe-Ni-Ti-Cu family.
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The study provided new insights into the microstructure and phase composition formation of B4C-TiB2-Fe32.3Al29.3Cu11.7Ni10.8Ti15.9 composites fabricated using spark plasma sintering. These findings significantly expand the understanding of the development of high-temperature materials based on high-entropy alloys (HEAs). A directionally crystallized eutectic B4C-TiB2 composite was successfully produced using the zone melting method. The mechanism of the formation of a reinforced structure, where TiB2 fibers are uniformly distributed within the B4C matrix, was investigated. The optimal crystallization rate (4 mm/min) ensured a eutectic parameter λ ~ 1.1 μm, resulting in the highest mechanical properties, including strength and hardness.
Composite materials based on HEA were obtained via spark plasma sintering at 1200 °C for 10 minutes. The phase composition includes B4C, TiB2, and reaction products of HEA components with boron and carbon atoms, such as (Al0.5Ti0.5)B2 and FeB. The formation of iron borides is likely due to localized melting during heating, driven by the eutectic Fe-B reaction. The microstructure is characterized by an Fe32.3Al29.3Cu11.7Ni10.8Ti15.9 matrix and B4C-TiB2 ceramic particles.
Reaction processes at the phase boundaries were identified, including the formation of a eutectic melt based on iron boride and the growth of titanium carbide into the B4C matrix via diffusion of Ti atoms from the HEA sublattice. The obtained results are of practical importance for the development of multifunctional materials with high mechanical performance, wear resistance, fracture toughness, and the ability to operate under extreme temperatures.
Product Description
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Kucher Oleksandr S.
Nakonechnyi Serhii O.
Teslia Serhii Yu.
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2024-12-13
