Carbon nanomaterials (graphene and carbon nanotubes) possessing excellent mechanical properties

outstanding thermodynamic stability

and superior electrical conductivity

are regarded as the ideal reinforcement for metal matrix composites. The employment of carbon nanomaterials in the magnesium alloy composites help to overcome the low strength

hardness

and modulus of magnesium alloys. However

due to the paucity of chemical reactions between magnesium and carbon nanomaterials and their poor wettability

the interfacial strength between the two materials is weak

thereby limiting the performance of the reinforcement. The utilization of interfacial regulatory substances is a conventional approach to enhancing the bonding strength at the interface of composite materials. This paper mainly introduces the preparation methods and types of interfacial regulatory materials for carbon nanomaterials reinforced magnesium matrix composites; focuses on the methods of adding interfacial regulatory substances to the composites

the interfacial bonding of interfacial regulatory substances to reinforcement and matrix

and the mechanism of improving the interfacial bonding strength of the composite materials.