摘要
Mg-Li matrix composites are one of the ideal structural materials in the fields of aerospace and military due to their high specific strength and stiffness, good damping and wear resistance, and small thermal expansion coefficient. The preparation technologies of Mg-Li matrix composites including powder metallurgy, pressure infiltration, stir-casting, foil metallurgy, and in-situ synthesis were introduced, and their advantages and disadvantages were compared. The common matrix alloys and reinforcements for Mg-Li matrix composites as well as the structure and performance of typical composites were mainly summarized. Then the interface chemistry between matrix and reinforcement was briefly reviewed. Finally, some problems existing at present and the possible solutions were discussed.
Mg-Li基复合材料由于具有高比强度和比刚度、良好的阻尼特性和耐磨性、以及较小的热膨胀系数,成为航空航天和军事领域的理想结构材料之一。介绍了粉末冶金、压力浸渗、搅拌铸造、薄膜冶金以及原位生成等Mg-Li基复合材料常用的制备方法,并对其优缺点进行比较。总结了Mg-Li基复合材料常用的基体合金和增强体,以及典型Mg-Li基复合材料的组织与性能。概述了Mg-Li基体复合材料中基体和增强体的界面化学。最后,针对目前存在的问题以及可能的解决途径进行了探讨。
基金
Project(2017zzts005)supported by the Fundamental Research Funds for the Central Universities of Central South University,China
Project(CSUZC201814)supported by the Open-End Fund for the Valuable and Precision Instruments of Central South University,China
