Preparation of B4C-TiB2 system composites by arc melting and their thermoelectric properties

Takashi Goto, Jianhui Li, Toshio Hirai

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

B4C-TiB2 quasi-binary composites were prepared by arc melting in argon atmosphere using B4C and TiB2 powders. Uniform lamella texture indicating eutectic reaction was observed at 25mol%TiB2 in the quasi-binary system. The electrical conductivity of the B4C-TiB2 composites significantly increased with increasing TiB2 content. The thermal conductivity (κ) of the composites containing 2mol%TiB2 was slightly smaller than that of B4C, but the κ values increased with increasing TiB2 content at more than 6mol%. The Seebeck coefficient of B4C-TiB2 composites showed maxima at 6mol%TiB2. The thermoelectric figure-of-merit (Z) values exponentially increased with increasing temperature, showing maxima at 6mol%TiB2. The greatest ZT values obtained in the present study was 0.55 at T=1100K for the composite containing 6mol%TiB2.

Original languageEnglish
Pages (from-to)60-64
Number of pages5
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume44
Issue number1
DOIs
Publication statusPublished - 1997 Jan

Keywords

  • Arc melting
  • Eutectic reaction
  • Microstructure
  • Thermoelectric properties
  • TiB-BC quasi-binary

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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