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 language | English |
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Pages (from-to) | 1457-1462 |
Number of pages | 6 |
Journal | Journal of the European Ceramic Society |
Volume | 32 |
Issue number | 7 |
DOIs | |
Publication status | Published - Jun 2012 |
Keywords
- Boride
- Mechanical alloying
- Powders-solid state reaction
- Thermal properties
- X-ray methods