Novel laminated multi-layer graphene/Cu–Al–Mn composites with ultrahigh damping capacity and superior tensile mechanical properties

Abstract

Laminated multi-layer graphene/Cu–Al–Mn composites were prepared via packaged hot roll bonding process for the first time. Microscopic observation shows that the grains in the Cu–Al–Mn layers are remarkably refined. Multi-layer graphene films intermittently disperse at the interfaces between Cu–Al–Mn layers. Some small fragments of multi-layer graphene films are squeezed into the Cu–Al–Mn layer, and around them, due to the formation of in-situ Al2O3 phase and nano-twins, multi-stage and multi-phase structures are formed. Performance tests show that the composites have ultrahigh damping capacity. Within a wide temperature range of 25–300 °C, the value of damping plateau is up to 0.1 (about 10 times that of the original Cu–Al–Mn alloy). The composites also have superior tensile mechanical properties. Their tensile strength and elongation are up to 913.3 MPa and 13.4% respectively (2.5 times and 4.1 times that of the original Cu–Al–Mn alloy). Microstructural origins of the excellent comprehensive properties were discussed in detail.