SiO₂与Mg-Li合金熔体反应动力学分析

来源期刊：中国有色金属学报1999年第4期

论文作者：于化顺 闵光辉 刘玉先 陈熙琛

文章页码：785 - 789

关键词：Mg-Li合金；SiO₂；反应动力学；复合材料

Key words：Mg-Li alloy; SiO₂; reaction dynamics; composites

摘    要：基于液淬试样组织观察的结果，对SiO₂与Mg-Li 合金熔体反应动力学进行了分析。建立了SiO₂与Mg-Li熔体反应的动力学模型，提出了控制粒子尺寸及其在熔体分布的措施。得出了SiO₂与Mg-Li熔体反应的速度表达式，确定了Mg₂Si的形成位置。结果表明：SiO₂与Mg-Li合金熔体的反应是分两步进行的，即首先在界面处反应生成MgO与Si，而后Si与Mg反应生成Mg₂Si。

Abstract: On the base of microstructure observation of quenching samples, dynamics of the reaction of SiO₂ with Mg-Li melt was discussed. The dynamic model of the reaction was established, and the ways for controlling particle size and particle distribution in melt were proposed. The equation of the reaction rate and formed location of Mg₂Si were obtained finally. The results indicate that the reaction is carried out by two steps, MgO and Si is firstly formed at the interface, and then Mg₂Si is formed apart from the interface.