摘要
在钎焊时间3～30min，钎焊温度860-1000℃的条件下，采用AgCuTi钎料对C／C复合材料和TC4合金进行了钎焊试验。利用扫描电镜及EDS能谱分析的方法对接头的界面组织及断口形貌进行了研究。结果表明，接头界面结构为C／C复合材料／TiC＋C／TiCu＋TiC／Ag（s．s）＋Ti3Cu4＋TiCu／Ti3Cu4／TiCu／Ti2Cu／Ti2Cu＋Ti（s．s）／TC4。由压剪试验测得的接头抗剪强度结果可知，在钎焊温度910℃，保温时间10min的条件下，接头获得的最高抗剪强度为25MPa。接头的断口分析结果表明，接头断裂的位置与被连接界面的碳纤维方向有关，当碳纤维轴平行于连接面时，断裂发生在复合材料中；当碳纤维轴垂直于连接面时，断裂主要发生在复合材料与钎料的界面处。
C/C composites and TC4 were joined by brazing and using AgCuTi as filler metal at the 860 ℃-1000 ℃ for 3 min -30 min. The interfacial microstructures and fracture surfaces were investigated by scanning electron microscopy and electron energy spectrum analysis. The results showed that the typical interface microstructure of brazed joints could be expresses as C/C composite/TiC＋C/TiCu＋ TiC/Ag（s.s）＋Ti3Cu4＋TiCu/Ti3Cu4/TiCu/Ti2Cu/Ti2Cu＋Ti（s.s）/TC4 with the maximal shear strength of 25 MPa at brazing temperature of 910 ℃ for 10min. The fracture surface analysis showed that the position of fracture surface was related to the orientation of carbon fiber. The joints were fractured in the composites when carbon fiber was parallel to the joined surface. The joints were fractured at the C/C composite/AgCuTi interface when the carbon fiber was vertical to the joined surface.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2007年第7期1210-1214,共5页
Rare Metal Materials and Engineering
基金
国家杰出青年科学基金资助项目(50325517)
