Thermal barrier coating for carbon fiber-reinforced composite materials

碳纤维增强复合材料热障涂层

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量级和高性能应用场景，包括超级跑车、飞行器和航天器部件。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Al₂O₃的热障涂层(TBC)。TBC包含平均直径为9.27μm的α相Al₂O₃颗粒。利用三点抗弯试验评估了TBC和CFRP基材之间的强附着力。当CFRP基材经受500-700°C火焰炙烤时，1.45-mm厚的TBC通过将表面温度降低到188-228°C为CFRP基材提供显著保护。在热冲击试验后分析了这种TBC/CFRP复合材料的热及力学响应。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的弯曲强度显著降低了95%。

Kim, H., Kim, J., Lee, J., & Lee, M. W. (2021). Thermal barrier coating for carbon fiber-reinforced composite materials. Composites Part B: Engineering, 109308.