Microstructure characterization and damping behavior of the novel graphene oxide/TiNi laminate composite sheet.

• An innovative graphene oxide/TiNi laminate composite sheet was designed and prepared. • The continuous Ti 2 Ni and TiC reaction layers were generated along the GO/TiNi interface without obvious disjunct. • The composite sheet showed superior damping properties than TiNi alloy and TiNi laminate sheet without GO. In this paper, the interfacial microstructure and damping behavior of the novel graphene oxide/TiNi laminate composite sheet (GO/TiNi) were characterized. Results showed that the well-bonded GO/TiNi interface and alternating laminate structure were obtained in the composite sheet. The continuous reaction layer adjacent to the TiNi matrix was detected as the Ti 2 Ni phase with cubic structure, and the reaction layer near the GO was confirmed as the TiC nanocrystalline. The rhombohedral Ni 4 Ti 3 phase could be tracked to precipitate within the TiNi matrix. Compared with the TiNi alloy and TiNi laminate sheet without GO, the GO/TiNi laminate composite sheet has the optimal intrinsic damping capacities with the tanδ (martensite) of 0.089 and tanδ (austenite) of 0.034, which are attribute to the effective introduction of the high damping GO reinforcement. [ABSTRACT FROM AUTHOR]