The ultrasonic-assisted brazing of 30 vol.% Si₃N₄/6061Al composites in air using a filler metal comprising a Zn-Al alloy was investigated. Effects of the ultrasonic action duration and brazing temperature on the microstructure and mechanical properties of the brazed joints were focused on. The surface oxide layer between the composites and filler metals appeared to be broken and gradually removed by the ultrasonic action, and a composite bond with uniformly distribution of the reinforcements was formed eventually. As the ultrasonic action duration and brazing temperature increased, the proportion of Si₃N₄ particles and the atomic percentage of Al in the bond layer increased. Increasing the brazing temperature led to grain coarsening of the α-Al phase. The maximum shear bond strength of the joints was 183 MPa, and fracture occurred on the Al metal matrix composites side. The higher strength was attributed to the α-Al phase and Si₃N₄ particles being uniformly distributed in the bond layers.

研究了在空气中使用包含Zn-Al合金的填充金属对30％（体积）的Si ₃ N ₄ / 6061Al复合材料进行的超声辅助钎焊。重点研究了超声波作用时间和钎焊温度对钎焊接头组织和力学性能的影响。复合材料和填充金属之间的表面氧化物层似乎被破坏并通过超声作用逐渐去除，最终形成了具有均匀分布的增强材料的复合材料粘结。随着超声波作用时间和钎焊温度的增加，Si ₃ N ₄的比例颗粒和键合层中Al的原子百分比增加。钎焊温度的升高导致α-Al相的晶粒粗化。接头的最大剪切粘结强度为183 MPa，在Al金属基复合材料侧发生断裂。较高的强度归因于α-Al相和Si ₃ N ₄颗粒均匀地分布在粘结层中。