A novel surface modification process for porous metals using friction phenomena

摘要

The surfaces of the aluminum foams were modified by the friction surface modification (FSM) process. The aluminum foams with a new surface structure were successfully obtained by the FSM process. The surface-modified zone (SMZ) had smoother surface than the unprocessed zone (UZ). A very dense layer without the cell structure was formed near the surface of the SMZ. The SMZ exhibited more high indentation strength than the UZ. Especially for 1390 rpm, the indentation strength was about twice the value of the UZ.The FSM process was a very effective technology for the improvement in the mechanical properties as well as the surface morphology of the porous metals. And then, the tool rotation speed was a very important parameter in order to control in the characteristics of the friction-surface-modified porous metals.