Synthesis of TiB2 from a carbon-coated precursors method

Zhezhen Fu, Rasit Koc

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

This article deals with the synthesis of TiB2 from carbon-coated TiO2 precursors with the addition of B4C. The carbon-coated precursors method alters the reaction process, compared with the conventional mixing of reactants, to produce high-quality TiB2 powders. The produced powders have a single phase, a submicron particle size (~0.3 to 0.8 μm), regular shape, loose agglomeration, and low level of contaminations (less than 0.5 wt% carbon and 0.6 wt% oxygen). The formation mechanism proposed is based on experimental results and thermodynamic evaluations. For comparison, the powders obtained from the mixture of reactants show higher agglomeration, a large particle size (>1 μm), high level of contaminations (0.7 wt% carbon and 1.1 wt% oxygen), and difficulty to control the reaction process (formation of TiBO3 and Ti2O3 as the intermediate phases). The synthesized powders from the precursors method can be hot pressed to a relative density of ~94.5% with the formation of platelike grains at 1800°C under a pressure of 35 MPa without additives.

Original languageEnglish (US)
Pages (from-to)2471-2481
Number of pages11
JournalJournal of the American Ceramic Society
Volume100
Issue number6
DOIs
StatePublished - Jun 1 2017

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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