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 |
|---|---|
| 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 |
Funding
The authors would like to express their appreciations to Aziz Genç for his help in TEM experiments. We would like to express our gratitude to State Planning Organization (DPT) for funding the projects entitled “Advanced Technologies in Engineering” with the project number 2001K120750 and “Development of Al–Cu Based Metal Matrix Composites via Powder Metallurgy Techniques” with the project number 90189 out of which the main infrastructure of the Particulate Materials Laboratories was founded.
| Funders | Funder number |
|---|---|
| Al–Cu Based Metal Matrix Composites via Powder Metallurgy Techniques | 90189 |
| DPT | 2001K120750 |
| Devlet Planlama Örgütü |
Keywords
- Boride
- Mechanical alloying
- Powders-solid state reaction
- Thermal properties
- X-ray methods