Aluminum diboride synthesis from elemental powders by mechanical alloying and annealing

Duygu Aĝaoĝullari, Hasan Gökçe*, Ismail Duman, M. Lütfi Öveçoĝlu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

In this study, AlB 2 powders were synthesized by using a combined method of mechanical alloying (MA) and annealing of elemental aluminum (Al) and boron (B) powders. Milling was performed in a planetary ball-mill (Fritsch™ Pulverisette 7 Premium Line) up to 15h under argon (Ar) atmosphere. Annealing process was carried out in a tube furnace at 650°C for 6h under Ar atmosphere. The effects of MA durations on the annealing process and AlB 2 formation were investigated. The conversion of Al and B powders to AlB 2 starts after only MA for 3h or after MA for 1h and subsequent annealing. A slight formation of AlB 12 occurs at 242°C for as-blended powders and it shifts to about 272°C for MA'd powders. Al-B powder blends MA'd for 9h and annealed have AlB 2 particles in size between 35 and 75nm in the presence of Al 13Fe 4, Fe 3B and Fe 2B contaminations.

Original languageEnglish
Pages (from-to)1457-1462
Number of pages6
JournalJournal of the European Ceramic Society
Volume32
Issue number7
DOIs
Publication statusPublished - Jun 2012

Keywords

  • Boride
  • Mechanical alloying
  • Powders-solid state reaction
  • Thermal properties
  • X-ray methods

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