铸轧铜铝复合板界面演变规律研究
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摘要
采用铸轧法制备了铜铝复合板,利用光学显微镜、扫描电镜和X射线衍射仪等分析手段考察了界面微观形貌和物相成分,分析了轧制和退火过程中界面的演变过程。结果表明,热处理过程中的界面演变过程主要包括过饱和固溶体形成、金属间化合物形核析出、金属间化合物沿界面横向相连、界面层增厚四个阶段。剥离过程中界面沿CuAl_2层开裂,随着退火时间的延长,剥离面形貌由撕裂棱和沟槽转变为撕裂平台和裂纹。轧制过程中界面层发生脆性断裂,纯铜和纯铝挤入裂缝形成直接接触区域。随着轧制压下率的增大,铜铝直接接触区域所占比例增大,破碎的界面层以尺寸较小的碎块状嵌在纯铜和纯铝之间,且碎块与界面之间呈一定夹角分布。
The microstructure and phase compositions of the interface layer of Cu/Al composite plate prepared by cast-rolling were investigated by means of OM, SEM and XRD. The interfacial evolution law during the rolling and annealing processes were analyzed. The results showed that the process of interface evolution during heat treatment mainly consisted of four stages: the formation of supersaturated solid solution, the nucleation of intermetallic compounds, the intermetallic compounds were laterally joined along the interface and the thickening of interface layer. The interface cracks propagated along the CuAl_2 layer in the process of peeling, with the extension of annealing time, the morphology of peeled surface changed from tearing edge and groove to tearing platform and crack. During the rolling process, the interface layer was broken, pure copper and pure aluminum were squeezed into the cracks and forming a direct contact area. With the increase of rolling screwdown ratio, the proportion of direct contact zone accounted for the total length of the interface gradually increased. The broken interfacial intermetallics were embedded between pure copper and pure aluminum and the fragments were in a certain angle with the interface.
The microstructure and phase compositions of the interface layer of Cu/Al composite plate prepared by cast-rolling were investigated by means of OM, SEM and XRD. The interfacial evolution law during the rolling and annealing processes were analyzed. The results showed that the process of interface evolution during heat treatment mainly consisted of four stages: the formation of supersaturated solid solution, the nucleation of intermetallic compounds, the intermetallic compounds were laterally joined along the interface and the thickening of interface layer. The interface cracks propagated along the CuAl_2 layer in the process of peeling, with the extension of annealing time, the morphology of peeled surface changed from tearing edge and groove to tearing platform and crack. During the rolling process, the interface layer was broken, pure copper and pure aluminum were squeezed into the cracks and forming a direct contact area. With the increase of rolling screwdown ratio, the proportion of direct contact zone accounted for the total length of the interface gradually increased. The broken interfacial intermetallics were embedded between pure copper and pure aluminum and the fragments were in a certain angle with the interface.
引文
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3 Honarpisheh M,Asemabadi M,Sedighi M.Materials and Design,2012,37,122.
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6 Tian Guangmin,Li Xuanming,Zhao Yongqing,et al.Materials China,2013,32(11),696 (in Chinese).田广民,李选明,赵永庆,等.中国材料进展,2013,32(11),696.
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8 Chen G,Li J T,Yu H L,et al.Materials and Design,2016,112,263.
9 Lee S,Son I S,Lee J K,et al.International Journal of Precision Engineering and Manufacturing,2015,16(3),525.
10 Sheng L Y,Yang F,Xi T F,et al.Composites Part B:Engineering,2011,42(6),1468.
11 Kouters M H M,Gubbels G H M,Ferreira O D S.Microelectronics Reliability,2013,53(8),1068.
12 Lee K S,Kwon Y N.Transactions of Nonferrous Metals Society of China,2013,23(2),341.
13 Guo Y J,Liu G W,Jin H Y,et al.Rare Materials and Engineering,2011,40(2),215.
14 Guo Y J,Liu G W,Jin H Y,et al.Journal of Materials Science,2011,46(8),2467.
15 Dai Yumei,Ma Yongqing,Wu Yunzhong.Transactions of Materials and Heat Treatment,2012,33(3),35(in Chinese).戴玉梅,马永庆,吴云忠.材料热处理学报,2012,33(3),35.
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