当前镁合金的研究主要集中于镁合金及其复合材料的制备与加工,但对制备轻金属纳米多层复合材料的研究很少.通过在镁合金板之间插嵌镁粉与多壁碳纳米管(CNTS)的球磨混合粉,然后在一定温度下采用累积叠轧(ARB)的方法,制备镁碳多层复合材料.分别用扫描电镜和光学显微镜来表征累积叠轧过程中材料微观组织的演变.结果表明所采用的工艺制备出了层界面之间机械结合较好的镁碳多层复合材料,由于部分镁合金层之间存在融合现象,其理论层厚为685 nm,实际层厚约为4μm.另外,在反复动态再结晶和层界面对晶粒长大的阻碍作用的共同作用下,材料中较薄的镁合金层具有较细小的晶粒.
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