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采用固/液熔接法制备了CuW/ZL101A整体材料,并对CuW/ZL101A扩散溶解层组织结构与形成机制进行了研究。实验表明,当熔接条件为(690~705)℃/60 min可以获得良好的结合界面,其界面结合为扩散与溶解结合,界面扩散溶解层主要由平面状扩散溶解层、柱状方向性扩散溶解层、共晶扩散溶解层3部分组成,其生长方向均趋于沿界面法线方向生长,利用扫描电子显微镜和X射线衍射仪观察和分析了各扩散溶解层的新相组成。以705℃/60 min为例,分析了整体界面扩散溶解层组织结构演变和形成机理:平面状扩散溶解层和柱状方向性扩散层分别由铜钨界面原子沿CuW界面形核结晶横向生长连成整体形成小平面状扩散溶解层,再转向正常纵向生长所形成;共晶扩散溶解层是由接近及远离共晶成分点的铝铜形成层片状伪共晶及网状离异共晶组织;以熔接690℃保温不同时间对界面扩散溶解层的影响可知:随着熔接时间延长,界面扩散溶解层形貌相同,无新相层的形成,仅扩散厚度存在差异。
The CuW / ZL101A monolithic material was prepared by solid / liquid fusion method, and the microstructure and formation mechanism of CuW / ZL101A diffusion dissolution layer were studied. Experiments show that when the welding conditions (690 ~ 705) ℃ / 60 min can get a good bonding interface, the interface combination of diffusion and dissolution combined, the interface diffusion solution mainly consists of planar diffusion dissolved layer, columnar directional diffusion dissolved layer , The eutectic diffusion and dissolution layer 3 parts, the growth direction tends to grow along the interface normal direction, the use of scanning electron microscopy and X-ray diffraction instrument observed and analyzed the new phase composition of each diffusion layer. Taking 705 ℃ / 60 min as an example, the evolution and formation mechanism of the global interface diffusion and dissolution layer structure were analyzed. The planar diffusive and columnar diffusion layers were formed by lateral growth of copper-tungsten interface atoms along the CuW interface nucleation and crystallization The entire formation of a small planar diffuse dissolution layer, and then turned to the normal longitudinal growth of the formation; eutectic diffusion layer is dissolved by the proximity and away from the eutectic composition of the point of aluminum-copper layered lamellar pseudo-eutectic and reticular dissimilar eutectic structure; The effect of welding at 690 ℃ for different time on the interfacial diffusion and dissolution layer shows that the interfacial diffusion and dissolution layer has the same morphology with no diffusion of new phase layer, only the diffusion thickness is different with the extension of welding time.