【摘 要】
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Si/ SiC ceramic composite and Invar alloy were successfully joined by vacuum brazing using Ti50Cu-W filler metals into which W was added to release the thermal
【机 构】
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School of Materials Science and Engineering
论文部分内容阅读
Si/ SiC ceramic composite and Invar alloy were successfully joined by vacuum brazing using Ti50Cu-W filler metals into which W was added to release the thermal stress of the brazed joint.Microstructures of the brazed joints were investigated by scanning electron microscope (SEM) and energy dispersive spectrometer (EDS).The mechanical properties of the brazed joints were measured by shearing tests.The results showed that the brazed joints were composed of Ti-Cu phase,W phase and Ti-Si phase.W had no effect on the wettability and mobility of the filler metals.The growth of Ti2 Cu phase was restrained,and the reaction between ceramic composite and filler metals was weakened.The specimen,brazed at 970 C for 5 min,had the maximum shear strength of 108 MPa at room temperature.
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