Effect of Argon Ion Bombardment on Diffusion Bonded Joint of Various Metals

Abstract

Specimens of aluminum (Al), austenitic stainless steel (SUS304L), pure iron (Fe) and Oxygen-free high conductivity copper (Cu) were treated by argon ion bombardment, and then were bonded by diffusion bonding method. The effects of argon ion bombardment on diffusion-bonded joints of four kinds of metallic materials were compared from the tensile strength at real bonded area and the fractographs. The results showed that bonding temperature was lowered by argon ion bombardment treatment for four kinds of materials. The effect of argon ion bombardment on diffusion-bonded joint depended strongly on the chemistry of the surface to be bonded, and increased in Al, SUS304L, Fe, and Cu in turn.

Effect of Surface Asperity on Diffusion Bonding

“…It has been shown that oxide films on a faying surface form inclusions at the bonding interface, and the inclusions degrade the bond. 1,2) Ion beam bombardment removes the oxide film on the faying surface, thus lowering the bonding temperature. [1][2][3] Using Ar-beam surface treatment, some joints can be made even at room temperature, e.g.…”