中文摘要：

采用Zn—Al钎料，以铝基复合材料SiC／A356为研究对象，对该材料辅助电磁场作用下的钎焊工艺及其接头界面微观行为进行了探索性的研究。试图通过电磁场效应，控制液固界面处强化相的推斥／吞没行为，并对不同交变方波电流峰值作用下的接头微观组织进行分析。研究结果表明，在磁场强度为0．5T，交变电流频率为100Hz，电流峰值为70A时SiC强化颗粒的行为得到了有效的控制，避免了SiC强化相颗粒在界面处的偏聚行为，获得了SiC强化相颗粒在钎缝中均匀分布的铝基复合材料钎焊接头。

英文摘要：

In order to control the pushing/engulfment behavior of the reinforced particles, the brazing technology and joint interfacial microstructure of aluminum alloy MMCs SIC/A356 using Zn-Al filler is studied in an electromagnetic field at different AC square peak value. Results show that the behav ior of the reinforced particles in solidified metal is controlled effectively by applying electromagnetic force when the magnetic intensity is 0. 5T, AC square current frequency is 100Hz and peak value is 70A. The SiC particles distribute uniformly and dispersive throughout the brazing seam without segregation phenomenon at the interface.