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In this paper, the QM-3SP2 type planetary ball mill, Fe 2 O 3 powder, Fe 3 O 4 powder , Si powder and Al powder as raw material, the use of mechanical chemical method to prepare a the the Al 2 O 3 / Fe 3 Si nanocomposite powder by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and simultaneous thermal analyzer (DSC-TG) were used to characterize the composite powders. The results show that: the 1.Al powder Fe 2 O 3 and Si powders mixed powder milling 5h react, the ball milling 20h epigenetic became Al 2 O 3 / the Fe 3 Si nano composite powder; the Al powder Fe 3 O a 4 and Si powders mixed powder milling reacts after 1h, 5h after milling generated Al 2 O 3 / Fe 3 Si nanocomposite powder. 2 the average grain size of the product decreased with milling time, the grain size of the milled beginning decreased rapidly, and then the grain size decreases gradually slows down. Milling for 20h by Al, Fe , 2 the O 3 and Si powder mixture prepared the Fe 3 Si and Al 2 O 3 average grain size of 13.6nm and 19.7nm respectively, prepared by the Al, Fe 3 O 4 and Si mixed powder The showing of Fe 3 Si and Al 2 O 3 , the average grain sizes are 19.5nm and 26.0nm. Al, Fe 2 O 3 and Si mixed powder milling 5h, 10h and 20h after composite powders annealing composite powders matter not occur changes, the phase of the diffraction peaks of the respective physical type becomes more regular. By the two samples (Al-Fe 2 the O 3 the the-Si flour and Al-Fe 3 O 4 -Si powder) milling for 20h can be prepared by Al 2 O 3 / Fe 3 Si nano-composite powders, the product has a nano- The crystal structure of the particles of the composite powder is very small, most of the particles of submicron particles, the particle shape of the rules of the composite powders, most of the shape of the particles is relatively standard spherical. In short, the by mechanical chemical method can quick prepared Al 2 O 3 / Fe 3 Si nano-composite powders. This is for the preparation of Al 2 O 3 / Fe 3 Si nanocomposites provide an experimental basis.
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