ВИКОРИСТАННЯ ВИСОКОКОНЦЕНТРОВАНИХ ПОТОКІВ ЕНЕРГІЇ ДЛЯ СТВОРЕННЯ ПОЛІФУНКЦІОНАЛЬНИХ КОМПОЗИЦІЙНИХ МАТЕРІАЛІВ СИСТЕМИ Al – Ti – C
The goal of the work is the creation of multifunctional composite materials using highly concentrated energy flows. The methods of physical experiment, registration of transient electrical processes, X-ray phase analysis, optical microscopy, as well as experimental methods of determining the physica...
Збережено в:
| Дата: | 2025 |
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| Автори: | , , |
| Формат: | Стаття |
| Мова: | Ukrainian |
| Опубліковано: |
Институт сверхтвердых материалов им. В. Н. Бакуля Национальной академии наук Украины
2025
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| Теми: | |
| Онлайн доступ: | http://altis-ism.org.ua/index.php/ALTIS/article/view/388 |
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| Назва журналу: | Tooling materials science |
Репозитарії
Tooling materials science| Резюме: | The goal of the work is the creation of multifunctional composite materials using highly concentrated energy flows.
The methods of physical experiment, registration of transient electrical processes, X-ray phase analysis, optical microscopy, as well as experimental methods of determining the physical-mechanical and operational properties of materials (hardness, wear resistance, heat resistance) are used in the work. The work is based on a new approach to obtaining metal-matrix composites (MMC), in which dispersion-strengthening inclusions are not added mechanically to the powder mixture as an additional component, but instead are synthesized during treatment with a high-voltage electric discharge (HVED) and homogeneous mixing of the components is achieved. Further consolidation of the prepared powders by the spark plasma sintering (SPS) method allows preventing grain growth and obtaining a consolidated material in a relatively short time with lower energy consumption than using conventional methods.
HVED treatment of the powder system with the initial composition of 85% Ti + 15% Al in ethanol at Ws = 10 MJ/kg allows to disperse the initial powders from an average diameter of 33 μm to an average diameter of ~ 6 μm and to synthesize the dispersion-strengthening phases of TiC, Ti2AlC, and Ti3AlC2 in them. Consolidation of the prepared powders by the SPS method allows obtaining a Ti3AlC2 – TiC nanolaminate composite with a hardness of HV5 = 4 GPa. The absolute wear intensity of the material was 0.007 g/km.
The practical significance of the work is that the preparation of powders using HVED with subsequent consolidation by the SPS method allows obtaining MMC’s with an increased level of hardness, wear resistance and heat resistance for obtaining tools for various purposes and construction materials for use in the aerospace industry and mechanical engineering.
The originality of the work stems from the fact that the new MMC is obtained by preparing the original powders with HVED, which contributes to the dispersion of the powders and the reactive synthesis of dispersing inclusions under the influence of microplasma discharges, and the subsequent SPS provides a controlled change in the phase composition and structure.
Key words: HIGH VOLTAGE ELECTRIC DISCHARGE, SPARK PLASMA SINTERING, METAL-MATRIX COMPOSITE, HARDNESS, WEAR RESISTANCE, HEAT RESISTANCE
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