航空发动机用T800级碳纤维增强聚酰亚胺复合材料制备及性能

Preparation and properties of T800-class carbon fiber reinforced polyimide composite for aero engine

针对航空发动机对高性能耐高温树脂基复合材料的需求,开展了T800级碳纤维增强聚酰亚胺复合材料制备与性能研究。研制了苯乙炔封端聚酰亚胺树脂基体EC-380A,开发了T800级碳纤维预浸料连续制备技术,获得了复合材料性能。树脂具备370℃~400℃耐温能力,可采用热压罐工艺成型。T800级碳纤维/EC-380A复合材料表现出耐高温、高强度、高模量和高韧性特点:室温下拉伸强度和模量分别达到2120 MPa和169 GPa,冲击后压缩强度(CAI)达到256 MPa,370℃孔拉强度和模量高温保持率达到97%和84%以上。制备了典型结构件,安全裕度充足。

Aiming at the need of aero engines for high-temperature resistance polymer-matrix composites with high performance,research works were carried out on preparation and properties T800-class carbon fiber reinforced polyimide composite.Phenylacetylene(PEPA)-endcapped polyimide resin,EC-380 A,was developed.Continuous fabrication technology for the T800-class fiber prepreg was established.Properties of the composite were obtained.The resin exhibits an application temperature of 370℃~400℃,and is suitable for autoclave processing.The T800-class fiber/EC-380 A composite exhibits features of high-temperature resistance,high strength,high modulus and high toughness,with a room temperature tensile strength and modulus of 2120 MPa and 169 GPa,respectively,a compressive strength after impact(CAI)of 256 MPa,and 370℃retention rates of open-hole strength and modulus above 97%and 84%,respectively.Typical components have been fabricated,and exhibit sufficient safety margins.