Abstract
Porous aluminum is superior in lightweight, high sound insulation and high energy absorption. In this study, copper powder dispersed porous aluminum core filled in hollow pipe composite materials was fabricated by friction welding. Al hollow disc filled with blowing and reinforcing agent powder was put into hollow pipe and the rotating tool was pressed into Al hollow disc. Frictional heat was softened Al and precursor of porous Al was fabricated because the rotating tool dispersed blowing and reinforcing agent powder into Al by means of plastic flow. It was shown that copper powder dispersed porous aluminum core filled in hollow pipe composite materials with porosity of approximately 60% and formation of CuAl_2 was successfully fabricated at a holding temperature of 1003 K and at a holding time of 6 min 30 sec.
