Effect of mechanical activation on TiC synthesis reaction in Al-Ti-C powder mixture
来源期刊：中国有色金属学报(英文版)2001年第5期
论文作者：马乃恒 梁工英 方小汉 苏俊义
文章页码：704 - 707
Key words：Al-Ti-C powder mixture; mechanical activation; reactive synthesis; activation energy
Abstract: After milling in a high-energy ball miller for various times, the synthesis reaction process of the Al-Ti-C powder mixture were investigated by difference thermal analysis (DTA) and X-ray diffractometry (XRD). According to the patterns of reaction peaks on the DTA curves, the activation energy of each reaction was calculated. The experimental results of DTA show that the synthesis reaction of Al-Ti-C powder mixture can be enhanced after high-energy milling. The longer the milling time, the lower the reaction temperature. The synthesis reaction of TiC is transformed from Ti+C→TiC to Al3Ti+C→TiC+3Al with long period milling. Meanwhile, the activation energy of the reaction reduces with increasing milling time. The effect of milling time on reduced activation energy for low temperature region is more significant than that for high temperature region.
