|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Phase Stability, Phase Transformations, and Reactive Phase Formation in Electronic Materials XXI
||Self-healing of Fiber-composite Laminates via In Situ Thermal Remending
||Jason Patrick, Alexander Snyder, Zachary Phillips
|On-Site Speaker (Planned)
Fiber-reinforced polymer composites are attractive structural materials due to their high specific strength/stiffness and excellent corrosion resistance. However, the lack of throughthickness reinforcement in laminated composites creates inherent susceptibility to fiber-matrix debonding (i.e., interlaminar delamination). This damage mode has proven difficult to detect and nearly impossible to repair via conventional methods, and remains a significant factor limiting the reliability of laminated composites in lightweight structures.
Here we detail the development of an intrinsic self-healing composite based on thermally-induced dynamic bond re-association of 3D-printed polymer interlayers. In contrast to prior studies, self-repair of delamination occurs in situ and below the glass-transition temperature of the epoxy matrix, thereby maintaining elastic modulus during healing. Rapid (minute-scale)and consecutive (50+) self-healing cycles have been achieved with fracture recovery reaching 100% of the interlayer toughened composite. This latest self-healing advancement exhibits unprecedented potential for perpetual in-service repair along with material multi-functionality to meet modern application demands.