铝基活性钎料真空钎焊Cf /C复合材料焊接接头的组织及性能
Microstructure and Properties of Vacuum Brazing Cf / C Composites Using Reactive Al Based Filler Metals
王 敏1， 亓效刚2， 陈茂爱2， 耿浩然3
点击：3622次 下载：0次
作者单位：1.山东山大产业集团有限公司， 山东 济 250061；2. 山东大学 材料学院，山东 济南 250061； 3.济南大学 材料学院，山东 济南 250022
中文关键字：Cf /C复合材料；铝基活性钎料；真空钎焊；剪切强度
英文关键字：Cf /C composite; reactive filler metal; vacuum brazing; shearing strength
中文摘要：用铝基活性钎料对Cf /C复合材料进行真空钎焊，并对接头的微观组织、形成机理和接头强度进行了试验研究。结果表明，使用铝基活性钎料可以实现Cf /C复合材料的连接,且在试验温度范围内，接头强度随钎料成分不同而发生变化。电子探针观察表明，钎料与Cf /C复合材料钎焊接头润湿性良好，存在成分偏聚层，这种层状结构对缓和焊接残余应力十分有利。室温下接头最高剪切强度可达16 MPa。
英文摘要：Vacuum brazing experiments of Cf /C composites were carried out using pure Al and Al-5Ti-B as filler metals. The microstructure of the brazing joints were studied by means of scanning electron microscopy (SEM) and energy dispersive X-ray spectrometer, the shearing strength of the joints were measured. The joining mechanisms were explored. The results indicate that the brazing temperature is the important processing parameter affecting the quality of the brazed joints. Vacuum brazing of Cf /C composites can be achieved using the pure Al and Al-5Ti-B brazing fillers at the brazing temperature of 730 or 750 ℃, respectively. Moreover, the joints have excellent microstructure and shear strength gets the level of practical applications up to 16 MPa.