(1. 山东工业大学 材料科学与工程学院，济南250061； 2. 中国科学院物理研究所，北京100080)
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。
关键字: Mg-Li合金；SiO2；反应动力学；复合材料
（1. College of Materials Science and Engineering, Shandong University of Technology, Ji'nan 250061, P.R.China
2. Physics Institute, Chinese Academy of Sciences, Beijing 100080, P.R.China）
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.
Key words: Mg-Li alloy; SiO2; reaction dynamics; composites
