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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CLSM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Al_2Cu。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。
In order to study the microstructure and dynamic evolution of the Cu / Al solid-liquid interface, the confocal laser scanning microscopy (CLSM) The solid-liquid composite interface was observed in situ. Combined with the results of composite interface scanning electron microscopy and X-ray energy dispersive spectroscopy, the relationship between the visual change of interface image and the reaction diffusion and migration at the interface of CLSM and the feasibility of CLSM in situ observation were discussed. The results show that high temperature reactive diffusion and local fusion are the main mechanisms for the Cu / Al solid-liquid composite interface bonding, and the composite layer is mainly Al 2 Cu. In the absence of pressure, interfacial inclusions and oxides can seriously impair the interfacial bonding effect.