التفاصيل البيبلوغرافية
| العنوان: |
Densification of boron carbide under high pressure. |
| المؤلفون: |
Matović, B.1 (AUTHOR) mato@vinca.rs, Urbanovich, V.2 (AUTHOR), Girman, V.3 (AUTHOR), Lisnichuk, M.3 (AUTHOR), Nikolić, D.1 (AUTHOR), Erčić, J.1 (AUTHOR), Cvijović-Alagić, I.1 (AUTHOR) |
| المصدر: |
Materials Letters. May2022, Vol. 314, pN.PAG-N.PAG. 1p. |
| مصطلحات موضوعية: |
*BORON carbides, *SPECIFIC gravity, *CUTTING tools, *CERAMICS, *HARDNESS |
| مستخلص: |
[Display omitted] • B 4 C ceramic was obtained by high-pressure sintering at 1500–1900 °C. • Densification was achieved at 4 GPa without the addition of sintering aids. • A high relative density of B 4 C ceramic samples in the 95–99% range was obtained. • The highest hardness of 37 GPa was achieved at 1900 °C for a 99% dense sample. • Amorphous or secondary phases were absent in the obtained B 4 C ceramic samples. Additive-free boron carbide (B 4 C) powders were densified at 4 GPa using the high-pressure "anvil-type with hollows" apparatus in the temperature range of 1500–1900 °C. The boron carbide ceramics prepared by this method showed a hardness of 37 GPa, which is very close to the hardness of mono-crystal boron carbide. The study showed that the boron carbide grains are uniformly sized without observed grain growth in the sintered materials. Obtained results revealed that high-pressure sintering can be a very effective low-temperature densification method for the obtainment of additive-free B 4 C ceramics. Moreover, the process can be scaled-up for the production of large-size composites required in various cutting tools and other extreme condition applications. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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