【摘要】 采用垂直充芯连铸法制备断面尺寸为60 mmmmmm(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CuI区)和胞状的CuAlII区)两区组成,在近铝侧为αAl)+CuAl伪共晶组织(III区)而在Cu和CuAl之间还残存未转变的高温相Cux。基于分析结果,提出了充芯连铸铜包铝的界面形成机理。更多还原

【Abstract】 Copper cladding aluminum(CCA) composites with the section dimensions of 60 mmmmmm(lengthangle 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 Cuplanar layer(zone I) and CuAlcellular layer(zone II), and that at the Al side is αAl)+CuAlpseudo eutectic structure(zone III), in addition, the high temperature phase Cux is remained between Cuand CuAlThus, the formation mechanism of interface in CCA composites fabricated by core-filling continuous casting was proposed.更多还原