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Obtaining at High Pressure the TiN-TiB<sub>2</sub> Ceramic Nano-Composite
Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, Kiev, Ukraine
Center of Investigation in Engineering and Applied Sciences, The Autonomous University of the State of Morelos (CIICAp-UAEMor), Cuernavaca, Mexico
Center of Investigation in Engineering and Applied Sciences, The Autonomous University of the State of Morelos (CIICAp-UAEMor), Cuernavaca, Mexico
Center of Investigation in Engineering and Applied Sciences, The Autonomous University of the State of Morelos (CIICAp-UAEMor), Cuernavaca, Mexico
- 1 Institute for Problems of Materials Science, National Academy of Sciences of Ukraine, Kiev, Ukraine
- 2 Center of Investigation in Engineering and Applied Sciences, The Autonomous University of the State of Morelos (CIICAp-UAEMor), Cuernavaca, Mexico
- 3 Center of Investigation in Engineering and Applied Sciences, The Autonomous University of the State of Morelos (CIICAp-UAEMor), Cuernavaca, Mexico
- 4 Center of Investigation in Engineering and Applied Sciences, The Autonomous University of the State of Morelos (CIICAp-UAEMor), Cuernavaca, Mexico
Materials Sciences and Applications·Volume 07 (2016)·Pages 232–237·Published 5 May 2016·DOI10.4236/msa.2016.75023
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Abstract
The process of consolidation of TiN nanopowders under a hydrostatic pressure of 3 GPa was evaluated from the evolution of substructure parameters of compacts obtained after different exposure of powder bodies under constant pressure at room temperature. It has been established that in compaction, changes in the substructure reflect deformation processes of the porous body, which are accompanied by relaxation processes and the corresponding decrease in microstresses. The sintering of consolidated 80 wt% TiN - 20 wt% TiB 2 powders at 3 GPa in the temperature range 1300 ℃ - 1600 ℃ leads to the substitution of N atoms by B atoms in TiN and possibly to the substitution of B atoms by N atoms in TiB 2 . The presence of oxygen in powders promotes the formation of titanium oxynitride, which increases the microhardness of specimens.
KeywordsTiNTiN-TiB<sub>2</sub>Baric TreatmentSubstructureCeramics
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