Synthesis and Characterization of In Situ Al-Al13Fe4-Al2O3-TiB2 Nanocomposite Powder by Mechanical Alloying and Subsequent Heat Treatment

Al-Al 13 Fe 4 -Al 2 O 3 -TiB 2 nanocomposite powder was fabricated by mechanical alloying (MA) and subsequent heat treatment of aluminum, ferrotitanium and boron oxide as a raw material. The obtained nanocomposite powder was evaluated by scanning electron microscopy (SEM) and X-ray diffraction (XRD)...

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Bibliographic Details
Published in:Inorganic and nano-metal chemistry 2014-02, Vol.44 (2), p.177-184
Main Authors: Jazi, E. Haghshenas, Esalmi-Farsani, R., Borhani, Gh, Jazi, F. Sharifian
Format: Article
Language:English
Subjects:
Al-TiB
Alloy powders
Aluminum
Aluminum oxide
Boron oxides
characterization
Crystallites
Ferrotitanium
Heat treatment
Mechanical alloying
Microhardness
nano- composite
Nanocomposites
Raw materials
Solid solutions
synthesis
Titanium diboride
X-ray diffraction
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Summary:Al-Al 13 Fe 4 -Al 2 O 3 -TiB 2 nanocomposite powder was fabricated by mechanical alloying (MA) and subsequent heat treatment of aluminum, ferrotitanium and boron oxide as a raw material. The obtained nanocomposite powder was evaluated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Also; microhardness values of powder particles after different milling times were measured. Microhardness of this nanocomposite was found to be about 161 HV. The results of XRD showed that the nanocrystalline supersaturated solid solutions of aluminum (α-Al) that formed within 30 h of MA with a mean crystallite size of 12 nm. The above experimental results showed that the heat-treated 30 h of MA powders leads to the in situ formation of nanocrystalline TiB 2 in an Al matrix with a mean crystallite size of 45 nm. It was also found that after the heat treatment, moreover, the TiB 2 phase, the other compounds such as Al 2 O 3 and Al 13 Fe 4 have been formed.
ISSN:1553-3174
2470-1556
1553-3182
2470-1564
DOI:10.1080/15533174.2013.768660