Effect of filler on dissimilar materials joining between surface-treated metal and rubber

Abstract

An aluminum alloy surface-treated with pure water was directly joined to a rubber containing different fillers to prepare a dissimilar materials joint. In order to study effect of filler on joint strength and joint state, a peeling test and observation for aluminum alloy surface before and after joining were performed in the dissimilar materials joints. There was a difference in the joining strength of the dissimilar materials joint depending on added filler. Microstructure formed by the surface treatment remained on the aluminum alloy surface in dissimilar materials joints after the peeling test, however its morphology was different depending on added filler. Therefore, it is speculated that the filler influences the surface morphology and results in different joining strength.