氢化钛的分解行为及其在制备泡沫铝中的应用

测定了TiH2在不同温度下的分解曲线,从热力学和动力学的角度对TiH2的分解规律进行了研究,并分析了使用TiH2制备泡沫铝时的应用方式.结果表明:TiH2的分解率随着温度的升高而逐步提高,TiH2的分解过程大致可分为三个阶段.在620~680℃范围内,TiH2在前10 min分解激烈,在10~20 min内TiH2的分解速度变得缓慢,在20 min以后TiH2的分解逐渐趋于停滞.在700~720℃之间,TiH2在前6 min内的分解速度很快,在6~10 min之间分解速度降低,在10 min以后分解反应出现停滞.

Decomposition Behavior of TiH2 and Its Application to Fabricating Aluminum Foam

The decomposition curves of TiH2 were determined at different temperatures, and how to decompose TiH2 was studied thermodynamically and kinetically. The way to use TiH2 as foaming agent to prepare aluminum foam was also discussed. The results showed that the decomposition rate of TiH2 increases with increasing temperature, and the decomposition process of TiH2 can be divided into three phases in a certain temperature range. In the range from 620°C to 680°C, the decomposition of TiH2 is violent for 10 min after starting, then the decomposing speed becomes slow during the next 10 min and the decomposition tends to stagnate after 20 min. In the range from 700°C to 720°C, the decomposing speed of TiH2 becomes very rapid for 6 min after starting, then decelerates during the next 4 min and stagnates later.