Research progress and perspective on bonding technologies of metal/CFRP materials and its interfacial bonding mechanism

Carbon fiber reinforced polymer (CFRP) has been applied in the fields of land, sea, air, and space due to advantages of light weight, high modulus, and low expansion. In recent years, with the development of carbon fiber reinforced thermoplastic plastics (CFRTP), bonding technologies for CFRPs and metals have gained extensive attention from domestic and foreign industry and scholars. This study summarizes the main technologies and bonding mechanisms of metal/CFRP. In addition, the forming principles of different bonding processes were analyzed, and contributing factors at the interface between metals and CFRPs were summarized. Furthermore, the technical breakthrough direction of high-quality metal/CFRP connections was explored based on development status and engineering application needs.