(1. 北京科技大學(xué) 材料科學(xué)與工程學(xué)院，北京 100083；
2. 河北工程大學(xué) 機(jī)電工程學(xué)院，邯鄲 056038)
摘 要: 采用垂直充芯連鑄法制備斷面尺寸為60 mm×14 mm×7 mm(長×寬×圓角半徑)、銅包覆層厚度為2 mm的銅包鋁復(fù)合材料，并采用掃描電子顯微鏡(SEM)、能譜儀(EDS)、X射線衍射儀(XRD)和透射電子顯微鏡(TEM)等對界面的形貌和組成進(jìn)行表征。結(jié)果表明：銅包鋁復(fù)合材料界面層在近銅側(cè)主要由平面狀的Cu9Al4(I區(qū))和胞狀的CuAl2(II區(qū))兩區(qū)組成，在近鋁側(cè)為α(Al)+CuAl2偽共晶組織(III區(qū))，而在Cu9Al4和CuAl2之間還殘存未轉(zhuǎn)變的高溫相Cu3Al2+x。基于分析結(jié)果，提出了充芯連鑄銅包鋁的界面形成機(jī)理。
關(guān)鍵字: 銅包鋁復(fù)合材料；充芯連鑄；界面；形成機(jī)理
（1.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. School of Mechanical and Electrical Engineering, Hebei University of Engineering, Handan 056038, China）
Abstract: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 Cu9Al4 planar layer (zone I) and CuAl2 cellular layer (zone II), and that at the Al side is α(Al)+CuAl2 pseudo eutectic structure (zone III) , in addition, the high temperature phase Cu3Al2+x is remained between Cu9Al4 and CuAl2. Thus, the formation mechanism of interface in CCA composites fabricated by core-filling continuous casting was proposed.
Key words: copper cladding aluminum composites; core-filling continuous casting; interface; formation mechanism
