(1.哈尔滨工业大学 现代焊接生产技术国家重点实验室，
哈尔滨 150001；
2.电子元器件可靠性物理国防科技重点实验室， 广州 510610)
摘 要: 以Al/Cu，Al/Si接触反应偶为例，研究了不同基体与反应材料组合下，共晶液相的产生及其铺展行为。结果表明： Al/Cu， Al/Si接触反应偶中共晶液相的产生具有明显的方向性—优先在Al侧产生，这是扩散偶之间的互扩散系数不等所造成的必然结果。而在接触反应钎焊的中间层材料选择过程中，考虑接触反应液相产生的方向性是发挥接触反应钎焊优越性的保障。
关键字: Al/Cu；接触反应偶；共晶反应；中间层选择
reactive brazing
——Orientation of production of eutectic liquid in
contact reaction
（1.National Key Laboratory of Welding，
Harbin Institute of Technology，Harbin 150001，China;
2.National Key Laboratory of Reliability Physics of
Electronic Product，Guangzhou 510610，China）
Abstract:The production and spread behavior of the eutectic liquid in the cont act reaction composing of different substrate and reactant was investigated by taking the example of Al/Cu and Al/Si contact reactive couple. Analysis results show that the production of the eutectic liquid has the orientation, and it prior to appear on the side of aluminum, which is caused by the difference between the diffusion coefficients of the diffusion couple. So，in order to gain good brazed joint in contact reactive brazing，the orientation o f the eutectic liquid must be taken into account during selecting an interlayer.
Key words: Al/Cu; contact reactive couple; eutectic reaction; interlayer selecting
