Testing Application of Scanning Acoustic Microscope for Adhesive Characteristics of Explosive-Aluminum-Alloy Interface

The working principle of scanning acoustic microscope (SAM) is introduced, and the acoustic transmission action is analyzed according to the geometrical and structural characteristics of explosive/Aluminum-alloy binding. The adhesive status of the interface in some typical parts of the binding is detected by SAM and 30MHz ultrasonic focal field lens. The results show that the interfaces between the Aluminum alloy and explosive tile adhere perfectly at the central gelatinized area. There is a 40μm-thickness thin interstice layer at most of the fringe nonglue area, but there are also some points less than Φ0.5mm that is tending to cohere. So, SAM is a feasible method to detect adhesive characteristics of interface between thin objects.