Carbon fiber-reinforced plastic (CFRP) composites are widely employed in lightweight and high performance applications including supercars, aero-vehicles, and space components. However, although carbon fibers are thermally stable, the low thermal endurance of the matrix materials remains a critical problem in terms of the performance of the material. In this study, we proposed a new, Al₂O₃-based thermal barrier coating (TBC) for the CFRP composites. The TBC comprised α-phase Al₂O₃ particles with a mean diameter of 9.27 μm. The strong adhesion between the TBC and the CFRP substrate was evaluated using a three-point bending test. When the CFRP substrate was subjected to a 500–700 °C flame, the 1.45-mm thick TBC protected the CFRP substrate remarkably by reducing the surface temperature to 188–228 °C. The thermo-mechanical responses of this TBC/CFRP composite were analyzed after thermal shock tests. Surprisingly, 50% of the pristine flexural strength of the TBC/CFRP composite was preserved, whereas that of neat CFRP was reduced significantly by 95%.

碳纤维增强塑料 (CFRP) 复合材料广泛用于轻型和高性能应用，包括超级跑车、航空车辆和航天部件。然而，尽管碳纤维具有热稳定性，但基体材料的低耐热性仍然是影响材料性能的关键问题。在这项研究中，我们为 CFRP 复合材料提出了一种新的基于Al ₂ O ₃的热障涂层 (TBC)。TBC 包含 α 相 Al ₂ O ₃平均直径为 9.27 μm 的颗粒。使用三点弯曲试验评估 TBC 和 CFRP 基材之间的强附着力。当CFRP基材经受500-700°C的火焰时，1.45-mm厚的TBC通过将表面温度降低到188-228°C来显着保护CFRP基材。在热冲击试验后分析了这种 TBC/CFRP 复合材料的热机械响应。令人惊讶的是，TBC/CFRP 复合材料的原始弯曲强度保留了 50%，而纯 CFRP 的弯曲强度显着降低了 95%。