采用垂直充芯连铸法制备断面尺寸为60 mm×14 mm×7 mm(长×宽×圆角半径)、铜包覆层厚度为2 mm的铜包铝复合材料，并采用扫描电子显微镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)和透射电子显微镜(TEM)等对界面的形貌和组成进行表征。结果表明：铜包铝复合材料界面层在近铜侧主要由平面状的Cu 9 Al 4(I区)和胞状的CuAl 2(II区)两区组成，在近铝侧为α(Al)+CuAl 2伪共晶组织(III区)，而在Cu 9 Al 4和CuAl 2之间还残存未转变的高温相Cu 3 Al 2+x。基于分析结果，提出了充芯连铸铜包铝的界面形成机理。
Copper cladding aluminum (CCA) composites with the section dimensions of 60 mm×14 mm×7 mm (length×width×round angle radius) and the sheath thickness of 2 mm were fabricated by vertical core-filling continuous casting (VCFC) technology, and the micro-morphology and composition at the interface of CCA composites were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS), X-ray diffractometry (XRD) and transmission electron microscopy (TEM). The results show that the interface at the side of Cu is composed of the Cu 9 Al 4 planar layer (zone I) and CuAl 2 cellular layer (zone II), and that at the Al side isα(Al)+CuAl 2 pseudo eutectic structure (zone III) , in addition, the high temperature phase Cu 3 Al 2+x is remained between Cu 9 Al 4 and CuAl 2 . Thus, the formation mechanism of interface in CCA composites fabricated by core-filling continuous casting was proposed.
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