FORMATION MECHANISM OF TiC IN Al/TiC COMPOSITES PREPARED BY DIRECT REACTION SYNTHESIS
来源期刊：中国有色金属学报(英文版)1998年第1期
论文作者：Zhang Erlin Yang Bo Zeng Songyan Li Qingchun Ma Mingzhen
文章页码：92 - 96
Key words：reaction; composites; Al/TiC; microstructure; mechanism
Abstract: The mechanism of reaction synthesis TiC in Al/TiC composites prepared by direct reaction synthesis(DRS) has been investigated in detail using quenching experiment, XRD and SEM. The results have shown that the reaction mechanism is a solution-precipitation mechanism, in which titanium dissolves into melted aluminium and reacts with carbon to form TiC, and then TiC particles precipitates out of the melt. It has also been shown that the processing of reaction synthesis TiC can be divided into three stages: melting of aluminium powder in the preform, formation and resolution of Al3Ti phase in the melted aluminium and the synthesis of TiC particles. Finally, a mechanism model of DRS to prepare Al/TiC has been established.
