期刊
RARE METALS
卷 25, 期 6, 页码 659-664出版社
NONFERROUS METALS SOCIETY CHINA
DOI: 10.1016/S1001-0521(07)60009-6
关键词
in situ composites; gas injection; aluminum nitride; titanium carbide
The fabrication of AlN-TiC/Al composites by carbon- and nitrogen-containing gas injection into Al-Mg-Ti melts was studied. It was shown that AlN and TiC particles could be formed by the in situ reaction of mixture gas (N-2 + C2H2 + NH3) with Al-Mg-Ti melts. The condition for the formation of AlN was that the treatment temperature must be higher than 1373 K, and the amounts of AlN and TiC increased with the increase of the treatment temperature and the gas injection time. It was considered that AIN was formed by the direct reaction of Al with nitrogen-containing gas at the interface of the gas bubble and the melt. However, the mechanism of TiC formation is a combination mechanism of solution-precipitation and solid-liquid reaction.
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