Optimized preparation and aerospace applications of wear-resistant POM composites: a mini-review

Polyoxymethylene (POM) composites are promising self-lubricating materials for aerospace bearings due to their excellent friction properties, mechanical rigidity and dimensional stability. However, inherent drawbacks including high volatile organic compound emissions and poor high-temperature thermal stability severely restrict their large-scale aerospace applications. This review systematically summarizes the state-of-the-art optimization strategies of aviation-oriented POM composites, covering low-VOC and heat-resistant resin modification, particle/fiber reinforcement, and intelligent porous self-lubricating structural design. The service mechanisms and key performance evaluation criteria of POM composites under complex aerospace working conditions are analyzed, and the advantages and limitations of mainstream molding processes are clarified. Current technical bottlenecks limiting the aerospace engineering application of POM composites are discussed. Finally, future development directions focusing on multi-scale synergistic modification, intelligent lubrication design and closed-loop performance optimization are proposed, aiming to promote the high-reliability application of POM-based composites in advanced aviation bearing systems. Application and performance of aviation low-speed heavy-load self-lubricating bearings. Optimization of high-performance polyoxymethylene resin. Preparations of different POM wear-resistant composites.