Abstract
Single-crystal aluminum borate (Al 4B 2O 9) nanowhiskers with diameters from 20 to 200 nm have been synthesized on the surface of aluminum powder at relatively low temperatures after high energy ball-milling pretreatment. It was found that the reaction temperature plays an important role in determining the diameter and length of the single-crystal Al 4B 2O 9 nanowhiskers. The growth of the nanowhiskers can occur at a low temperature of 650 °C due to the ball-milling pretreatment. The growth mechanism of the nanowhiskers is considered to be the solution–liquid–solid (SLS) growth. Our in-situ growth of nanowhiskers on the aluminum matrix is an effective way to prepare Al 4B 2O 9 nanowhisker/aluminum composite powders with homogenous distribution of the reinforcement.
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