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

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.

FundersFunder number
Al–Cu Based Metal Matrix Composites via Powder Metallurgy Techniques90189
DPT2001K120750
Devlet Planlama Örgütü

    Keywords

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

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