摘要
Mg/Al复合材料在汽车、航空航天和电子设备等领域广泛应用.相对于制备复合板的轧制工艺,铸造能够用于制备复杂的复合材料构件,并具有成本低和生产效率高等优点.然而,铸造Mg/Al复合材料存在微观组织难以控制和界面结合强度较低等问题,限制了材料性能.影响复合材料性能的因素包括铸造工艺、界面处理和扩散层组织等.目前,主要通过控制晶粒尺寸、界面强化和界面反应等方式来强化复合材料.本文综述了铸造法制备Mg/Al复合材料过程中的工艺参数对复合界面的影响,包括扩散层厚度、晶粒尺寸等,最后对此方向提出自己的见解.
Abstract
Mg/Al composites are widely used in automotive,aerospace and electronic equipment.Compared with the rolling process for preparing composite plates,the casting method can be used to prepare complex composite components,and has the advantages of low cost and high production efficiency.However,the microstructures of Mg/Al composites prepared by casting process is difficult to control and the interface bonding strength is relatively low,limiting the material performances.The factors affecting the properties of the composite include casting process,interface treatment and diffusion layer structure.At present,composites are strengthened mainly by controlling grain size,interface strengthening and interface reaction.In this paper,the effects of the process parameters on the interface of Mg/Al composites prepared by casting process are reviewed,including diffusion layer thickness,the grain size and so on.Finally,proposed author's opinions in this dierction.
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