Performance enhancement of advanced aero-engines sets a higher requirement for their overall structural lightweighting. Polymer-matrix composite (PMC) are one of the key materials to achieve aeroengine lightweighting. In recent years, focusing on the aero-engine cold-section parts, AECC Beijing Institute of Aeronautical Materials (BIAM) has systematically developed PMCs of high-toughness epoxy, high-temperature and high-toughness bismaleimide, high-temperature polyimide and high-toughness thermoplastic resins. This article introduces the foreign profile of PMCs for aero-engines and the demands of aeroengines for PMCs. Then, taking BIAM as the representative, domestic current status of PMCs for aero-engines and application are introduced. PMC development trend and emphasis for aero-engines are proposed. Overall, domestic PMC for aero-engines have made breakthrough in such aspects as high-temperature resistance, impact resistance, structure/function integration and integral fabrication technology, and have achieved batch application in such parts as fan blades, containment casings and outer ducts. For the needs of future aero-engines, PMC would focus more and more on the directions including thermal resistance enhancement, toughness improvement, structure integration, processing automation and intelligentization, full-life cost minimization.

Poly（aryl ether ketone）（PAEK） thermoplastic composites exhibit exceptional impact resistance and possess significant application potential in the aerospace industry. To address mechanical performance limitations of PAEK composites fabricated through automated in-situ placement, this study systematically investigates the impacts of post-processing parameters-including temperature, pressure and time-on pore elimination and mechanical properties. Utilizing the automated fiber placement, PAEK prepregs are processed into laminates. A viscosity-pressure-time coupling model is formulated through differential scanning calorimetry（DSC）, rheological assessments and mechanical characterizations. The results demonstrate the model predicts reasonably pore elimination across varying process parameters and the critical post-processing temperature is identified as 340 ℃. The pore elimination is facilitated rapidly due to low and stable resin viscosity at 340-360 ℃. The post-processing pressure significantly influences pore removal efficiency, with a critical pressure of 0.7 MPa at 360 ℃ and requiring 60 min for complete pore elimination. Higher pressures lead to only marginal performance enhancements. The time dependency of material performance depends on pressure: at 0.7 MPa and 360 ℃, full pore elimination is achieved within 60 min, whereas at 1.6 MPa, the required time is reduced to 20 min. At 0.7 MPa, 360 ℃ and 60 min, the tensile strength, flexural strength and interlaminar shear strength are 2844, 1653 MPa and 103 MPa, respectively.