中文摘要：

为研究Cu/Al固-液复合界面的微观形貌及其动态演化规律,利用共聚焦激光扫描高温显微镜（CLSM）对Cu/Al扩散偶在快速加热至Al液相温度610℃及其保温过程中的固-液复合界面进行了原位观察。并结合复合界面扫描电镜和X射线能谱仪分析结果,探讨了CLSM下界面图像视觉变化与连接界面反应扩散迁移的对应关系,以及CL SM原位观察的可行性。结果表明,高温反应扩散和局部熔合是Cu/Al固-液复合界面结合的主要机制,复合层主要为Al2Cu。且在无压力作用下,界面夹杂物和氧化层物会严重削弱界面的结合效果。

英文摘要：

In order to research the microstructure and dynamic evolution law of Cu/Al bonding interface in solid-liquid bonding process, the in-situ observation research was carried out by heating a Cu/A1 couple to reach the liquid Al phase temperature of 610℃ and holding temperature before cooling down on the platform of confocal laser scanning high-temperature microscope（CLSM）. Combining with SEM and EDS analysis results, the correlation between the change of visual sense and the migration of bonding interface caused by reaction diffusion was discussed, and the feasibility of in-situ observation with CLSM was also discussed. The results show that reaction diffusion and local fusion are the main mechanisms of Cu/Al solid-liquid bonding. The composite layer is mostly composed of Al2Cu. The research shows that the inclusions and oxide at the interface can severely weaken the interface bonding effect under no pressure.