Preparation of TiC-TiB2-SiC ternary eutectic composites by arc-melting and their characterizations

Wen Jun Li, Rong Tu, Takashi Goto

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

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 languageEnglish
Pages (from-to)1193-1197
Number of pages5
JournalMaterials Transactions
Volume47
Issue number4
DOIs
Publication statusPublished - 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

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