Abstract
Abstract: Ceramic matrix composites based on cubic boron nitride with a TaC binder phase are sintered under conditions of high pressure and high temperature. The sintering is carried out in a high-pressure apparatus of the toroid type in the temperature range of 1450–2450°C. It is shown that a chemical reaction between components of the mixture with the formation of TaB2 takes place at a sintering temperature above 2150°C. The microhardness of the composites increases with an increase in the sintering temperature and reaches a maximum value (34 GPa) at 2150°C. The composites show high resistance to mechanochemical wear when used for high-speed machining of nickel-based alloy Inconel 718.
Original language | English |
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Pages (from-to) | 51-57 |
Number of pages | 7 |
Journal | Journal of Superhard Materials |
Volume | 42 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2020 Mar 1 |
Subject classification (UKÄ)
- Mechanical Engineering
- Materials Engineering
Free keywords
- boron nitride
- high pressure
- microhardness
- tantalum carbide