その場生成したCuAl2を分散させたポーラスAlコア充填パイプ複合部材の創製

概要

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Porous Al is superior in lightweight, high sound insulation and high energy absorption. In this study, copper powder dispersed porous Al core filled in hollow pipe composite materials was fabricated by friction welding and in-situ formation of CuAl2 was attempted for the reinforcement of porous Al. Al hollow disc filled with blowing agent, stabilization agent and Cu powder was put into hollow pipe and the rotating tool was pressed into Al hollow disc. Frictional heat softened Al hollow disc and precursor of porous Al was fabricated because the rotating tool dispersed the powder into Al by means of plastic flow of Al. It was shown that porous Al core filled in hollow pipe composite materials with porosity of approximately 60% and in-situ formation of CuAl2 was successfully fabricated at a holding temperature of 1003 K and at a holding time of 6 min 30 sec.