当密度分布指数p=2时,根据密度分布函数设计的材料密度和厚度要求,叠层不同组分不同厚度流延膜烧结制备了Mg-Cu密度梯度材料。通过XRD、光学显微镜、SEM、超声波扫描显微镜等对材料显微结构、不同层间结合及平整性、密度进行了表征。结果表明：所制备的Mg-Cu密度梯度材料整体致密,中间层的平整性和平行度较好,结合紧密,不存在明显的界面扩散,密度和厚度方向的分布满足密度分布函数（p=2）要求。
According to the requirement of the density and thickness when the density distribution index p=2 in the density distribution function,the green tapes with different composition and thickness were laminated and then sintered to prepare Mg-Cu density graded materials.XRD,metallographic analysis,SEM,and ultrasound scanning microscope（USM） were used to characterized the material microstructure and combination between different layers.The results show that Mg-Cu density graded material is dense.The parallelism and flatness of intermediate layer are good and the combination is tight.The interface diffusion of different layers is not obvious.The density distribution in thickness direction meets the design requirement of the density distribution function（p=2）.
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