Abstract
TiC-TiB2-SiC composites were synthesized by arc-melting using TiC, TiB2 and SiC powders as starting materials in Ar atmosphere. TiC-TiB2-SiC system was a ternary eutectic, whose eutectic composition was 34TiC-22TiB2-44SiC (mol%). The TiC-TiB 2-SiC eutectic composite showed a lamellar texture, where lamellar SiC grains paralleled to lamellar TiC grains. TiB2 grains had an angle of about 30 to 60° with lamellar SiC and TiC grains. The hardness of TiC-TiB2-SiC eutectic composite was 25.5 GPa at the load of 1.96 N and increased with increasing TiC content. The electrical conductivity of the eutectic composite was 2.81 × 103 Sm-1 at the room temperature and decreased with increasing temperature. The thermal conductivity of the eutectic composite was 25 to 60 WK-1 m-1 at the room temperature and decreased with increasing temperature. The electrical conductivity of TiC-TiB2-SiC ternary composites decreased with increasing SiC content, and the thermal conductivity decreased with increasing TiC content.
Original language | English |
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Pages (from-to) | 1193-1197 |
Number of pages | 5 |
Journal | Materials Transactions |
Volume | 47 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2006 Apr |
Keywords
- Arc-melted method
- Eutectic composite
- Phase diagram
- Tic-tib-sic
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering