The Mg–Al composite heat dissipation structure has a good application prospect in the aviation industry. In view of the key problem that brittle Al
12
Mg
17
Al
3
Mg
2
compounds are easily generated in the connection of Mg–Al dissimilar materials
this experiment adopts the ultrasonic-assisted transient liquid phase bonding (U-TLP Bonding)
and uses pure Zn as the interlayer
the reliable connection of Mg/Zn/Al joint is realized at 350 ℃ . The effect of ultrasonic time on the microstructure evolution and mechanical properties of the joint is studied. Under the optimal process parameters
the joint is mainly composed of Mg+MgZn eutectoid structure
and the average shear strength of the joint reaches 50.2 MPa.