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Information × Registration Number 0224U032700, (0123U103092) , R & D reports Title Development of scientific and technological bases for the creation of new materials based on Fe-Al intermetallics with increased resistance and heat resistance to ensure efficient operation and environmental safety in the nodes of energy and transport engineering popup.stage_title Розробка та оптимізація складу та режимів отримання інтерметаліду із суміші порошків Fe+Al+карбід (борид) Head Yuliia V. Fartushna, Доктор хімічних наук Registration Date 02-12-2024 Organization Frantsevich Institute for Problems of Materials Science National Academy of Science of Ukraine popup.description1 According to the results of the study of the influence of the composition of the initial charge and the main technological parameters on the phase and structure and physical-mechanical properties of alloys to develop new compositions and optimized technology for powder metallurgy intermetallics based on FeAl system with increased stability and heat resistance to ensure efficient operation and environmental safety in the units of energy and transport engineering in a wide range of temperature popup.description2 New data has been obtained regarding the phase and structure formation in the Fe-Al-{C,B,Mo} and Fe-Al-Ti-{C,B} systems. Phase diagrams covering melting/crystallization regions have been constructed, and thermodynamic modeling using the CALPHAD method was performed, allowing the optimization of alloy compositions and alloying elements. A new binary compound, Al45Mo7, was identified for the first time. A two-stage sintering technology for iron aluminide reinforced with ceramic particles was developed. Materials with up to 5% porosity, bending strength exceeding 900 MPa, and yield strength at 650 °C reaching 470 MPa were produced. A scheme for obtaining non-porous products through direct powder forging was proposed. An enhanced three-step forging technology enabled the implementation of dynamic recrystallization, increasing the strength to 1835 MPa and improving heat resistance. The impact of reinforcing particles (TiC, Ni₃B, TiB₂, CrB₂, B₄C) on the structure and properties of iron aluminide-based composites was studied. Reinforcement with TiC particles (10-30 vol.%) provided low-temperature strength of 1500–1700 MPa and heat resistance at 700°C reaching 450 MPa. In the Fe3Al-Fe3AlC system, the effectiveness of strengthening with Fe₃AlC perovskite-type carbide (k-phase) was demonstrated using fine carbonyl iron powders with a particle size of 10 μm enriched with 1 wt.% carbon. The material strengthened by the k-phase exhibited the best combination of low- and high-temperature properties after three-step forging consolidation at 1220 °C, achieving a yield strength of 430–460 MPa at 700°C and a room-temperature strength of 1250 MPa. Materials reinforced with Ni₃B and CrB₂ particles demonstrated strengths of 1500–2029 MPa and plasticity up to 3% at room temperature, while at 700°C, the yield strength reached 450–480 MPa. Reinforcement with B₄C particles provided strength up to 1600 MPa under normal conditions, although plasticity and heat resistance were somewhat lower. Product Description popup.authors Yevych Yan I. Baglyuk Gennadii A. Danylenko Mykola I. Kyryliuk Stepan F. Tolochyn Oleksandr I. Tolochyna Oleksandra V. popup.nrat_date 2024-12-02 Close