利用非自耗电弧熔融技术制备的22Ti-78Si (wt%)高温共晶钎料实现SiC陶瓷连接. 采用SEM、材料试验机研究了工艺参数对钎焊接头的组织结构、强度和断口形貌的影响规律. 结果表明: 在钎焊温度1380~1420℃、保温时间5~20min、钎料厚度50~200 μm条件下, 均能实现SiC陶瓷连接, 在1400℃、保温时间10min和钎料厚度100μm的条件下, SiC/22Ti-78Si/SiC接头剪切强度最大值可达125MPa.
SiC ceramic was joined using 22Ti-78Si (wt%) brazing alloy which was prepared by the non-consumable arc-melting technology. The effects of brazing parameters on the microstructures and the fracture morphologies of the brazed joints were investigated by SEM. The mechanical properties of the brazed joints were measured by a universal mechanical testing machine. The results show that SiC ceramic is successfully joined in a proper condition, brazing temperature of 1380-1420℃, soaking time of 5?20min and the brazing alloy thickness of 50-200μm. The maximum shear strength of the brazed joint reaches 125 MPa at brazing temperature of 1400℃, soaking time of 10min and the brazing alloy thickness of 100μm.
参考文献
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