Synthesis of ultra-refractory transition metal diboride compounds

William G. Fahrenholtz*, Jon Binner, Ji Zou

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)
894 Downloads (Pure)

Abstract

This paper critically evaluates methods used to synthesize boride compounds with emphasis on diborides of the early transition metals. The earliest reports of the synthesis of boride ceramics used impure elemental powders to produce multiphase reaction products; phase-pure borides were only synthesized after processes were established to purify elemental boron. Carbothermal reduction of the corresponding transition metal oxides emerged as a viable production route and continues to be the primary method for the synthesis of commercial transition metal diboride powders. Even though reaction-based processes and chemical synthesis methods are mainly used for research studies, they are powerful tools for producing diborides because they provide the ability to tailor purity and particle size. The choice of synthesis method requires balancing factors that include cost, purity, and particle size with the performance needed in expected applications.

Original languageEnglish
Pages (from-to)2757-2772
JournalJournal of Materials Research
Volume31
Issue number18
Early online date1 Jul 2016
DOIs
Publication statusPublished - Sep 2016

Keywords

  • boron
  • ceramic
  • compound

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanical Engineering
  • Mechanics of Materials
  • Condensed Matter Physics

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