Carbon nanotube（CNT）-reinforced 6061 Al（CNT/6061 Al） composites were fabricated via powder metallurgy combined with friction stir processing（FSP）. CNTs were dispersed after FSP and accelerated the precipitation ...Carbon nanotube（CNT）-reinforced 6061 Al（CNT/6061 Al） composites were fabricated via powder metallurgy combined with friction stir processing（FSP）. CNTs were dispersed after FSP and accelerated the precipitation process of the CNT/6061 Al composites. However, the strengthening effect of CNTs on the T6-treated materials was insignificant,while the composites under the FSP and solution treatment conditions exhibited increased strength compared to the matrix.Precipitate-free zones（PFZs） were detected around CNTs in the T6-treated CNT/6061 Al composites, and a model was proposed to describe the effect of PFZs on strength. The calculations indicated that the strength of PFZs was similar to that of the T6-treated 6061 Al. As a result, the strengthening effect of CNTs on the T6-treated CNT/6061 Al composites was insignificant.展开更多
基金support of National Key Research & Development Plan under Grant No.2017YFB0703100Key Research Program of Frontier Sciences, CAS+1 种基金the CAS/SAFEA International Partnership Program for Creative Research Teamsthe National Natural Science Foundation of China under Grant No. 51501189
文摘Carbon nanotube（CNT）-reinforced 6061 Al（CNT/6061 Al） composites were fabricated via powder metallurgy combined with friction stir processing（FSP）. CNTs were dispersed after FSP and accelerated the precipitation process of the CNT/6061 Al composites. However, the strengthening effect of CNTs on the T6-treated materials was insignificant,while the composites under the FSP and solution treatment conditions exhibited increased strength compared to the matrix.Precipitate-free zones（PFZs） were detected around CNTs in the T6-treated CNT/6061 Al composites, and a model was proposed to describe the effect of PFZs on strength. The calculations indicated that the strength of PFZs was similar to that of the T6-treated 6061 Al. As a result, the strengthening effect of CNTs on the T6-treated CNT/6061 Al composites was insignificant.
