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[Display omitted] • In-situ growing carbon nanotubes (CNTs) on the surface of Ti particles prepared a novel CNTs@Ti hybrid reinforcement. • CNTs with good structural integrity were evenly dispersed into the Al matrix owing to the carrying effect of Ti particles. • The precipitation of nano-scaled TiC, Al 4 C 3 and TiAl 3 enhanced the interface bonding of CNT/Al. • The high strength of composite can attribute to the multi-phase coupling synergistic strengthening effect. The strengthening effect of carbon nanotubes (CNTs) in Al matrix composites (AMCs) is significantly weakened by CNTs agglomeration and unsubstantial interfacial bonding with the Al matrix. In this study, CNTs were grown on the surface of Ti particles by chemical vapor deposition to obtain CNTs@Ti hybrid reinforcement, followed by powder metallurgy to prepare CNTs@Ti/Al composites. Evenly dispersed CNTs with good structural integrity were successfully obtained using the carrying effect of the micron-sized Ti particles. Meanwhile, TiC, Al 4 C 3 , and TiAl 3 were generated at the CNT/Al interface, which strengthened the bearing capacity of the inner-wall of the CNTs, improved the wettability of the CNT/Al interface, and enhanced the strain-hardening ability of the Al matrix. The deficiencies in the CNTs/Al composites are compensated by this kind of materials design, and the two types of reinforcements have a synergistic strengthening effect, which greatly improves the comprehensive mechanical properties of AMCs. An excellent interface structure is formed by controlling the interface reaction such that the dispersion, grain boundary, dislocation, and load transfer strengthening mechanisms are fully realized. [ABSTRACT FROM AUTHOR]

Aluminum matrix composites (AMCs) reinforced with novel carbon nanotube (CNT)-Fe-based metallic glass (FMG) synergistic reinforcements were successfully prepared by powder metallurgy. The CNT-FMG reinforcements were obtained by growing CNTs on the surface of FMG particles using chemical vapor deposition (CVD). By controlling the catalytic temperature, the grown CNTs exhibited good morphology, a high degree of graphitization, and thermal oxidation stability. CNTs were homogeneously dispersed in the Al matrix through the carrying action of FMG particles. The CNT-FMG synergistic reinforcements significantly improved the mechanical properties of the composite, and formed a tight interfacial bonding with the Al matrix. The CNT-FMG reinforcements had a remarkable synergistic strengthening effect on the composite. • CNTs were grown on the surface of FMG particles by chemical vapor deposition. • CNT-FMG synergistic reinforced Al matrix composites were prepared. • CNTs were homogeneously dispersed in Al matrix through the carrying of FMG. • CNT-FMG contributed remarkable synergistic strengthening effect to the composite. [ABSTRACT FROM AUTHOR]