Carbothermal production of ZrB 2-ZrO 2 ceramic powders from ZrO 2-B 2O 3/B system by high-energy ball milling and annealing assisted process

Özge Balci*, Duygu Aǧaoǧullari, Ismail Duman, M. Lütfi Öveçoǧlu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Zirconium diboride (ZrB 2)-zirconium dioxide (ZrO 2) ceramic powders were prepared by comparing two different boron sources as boron oxide (B 2O 3) and elemental boron (B). The production method was high-energy ball milling and subsequent annealing of powder blends containing stoichiometric amounts of ZrO 2, B 2O 3/B powders in the presence of graphite as a reductant. The effects of milling duration (0, 2 and 6 h), annealing duration (6 and 12 h) and annealing temperature (1200-1400°C) on the formation and microstructure of ceramic powders were investigated. Phase, thermal and microstructural characterizations of the milled and annealed powders were performed by X-ray diffractometer (XRD), differential scanning calorimeter (DSC) and transmission electron microscope (TEM). The formation of ZrB 2 starts after milling for 2 h and annealing at 1300°C if B 2O 3 is used as boron source and after milling for 2 h and annealing at 1200°C if B is used as boron source.

Original languageEnglish
Pages (from-to)2201-2207
Number of pages7
JournalCeramics International
Volume38
Issue number3
DOIs
Publication statusPublished - Apr 2012

Keywords

  • A. Milling
  • Annealing
  • D. Borides
  • D. Carbon
  • D. ZrO

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