Abstract
One possible route for producing the fine and homogenous distribution of hard particles in composite microstructure is the mechanochemical processing in which high-energy ball milling promotes the reaction in a mixture of reactive powders. In this study mechanochemical reaction of B 2O 3 and Al powder during ball milling was studied. The phase transformation and microstructure of powder particles during ball milling were investigated by X-ray diffractometry and scanning electron microscopy. The results showed that during ball milling the B 2O 3–Al reacted with a combustion mode producing Al 2O 3–AlB 12 nanocomposite. The crystallite size of Al 2O 3 and AlB 12 was 40 and 25 nm, respectively. This structure appeared to be stable upon annealing.
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