Ultrasonic Welding of Thin-Alumina/Aluminum Using Inserts
Tomoaki ISHIKURO and Shin-ichi MATSUOKA
Abstract:This paper describes an experimental study of ultrasonic welding of thin ceramics and metals using inserts. Ultrasonic welding has made it possible to join various thick ceramics, such as Al2O3 and ZrO2, to aluminum at room temperature, quickly and easily compared to other welding methods. However, for thin ceramics, which are brittle, it is expected that welding is difficult to perform without causing damage. In this experiment, anodizing aluminum oxide film was used as thin alumina ceramics. Actually, aluminum was not able to be directly welded to an anodic oxide film without breakage. Vapor deposition of aluminum alloys (target material : A2017, A6061, A7075) on the film was contributed as an effective insert layer for welding at low pressure and a short duration without causing damage to the anodic oxide film. For example, the ultrasonic welding of thin Al2O3/Al was accomplished under the conditions of ultrasonic horn top amplitude of 32mm, welding pressure of 5MPa and required duration of 0.1s. Key Words:Ultrasonic welding, Vapor deposited film, Insert material, Anodic oxide film, Welding strength