Comparative Study Between CF/PEKK Thermoplastic Composite by Hot-Press Molding and CF/PEEK Composite Using Automated Fiber Placement Process

LIU Ya’nan; LIU Chenxiao; ZHU Minghao; LI Laixin; FENG Rongxin

doi:10.16080/j.issn1671-833x.2021.11.050

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Comparative Study Between CF/PEKK Thermoplastic Composite by Hot-Press Molding and CF/PEEK Composite Using Automated Fiber Placement Process

更新时间：2025-10-30

- Comparative Study Between CF/PEKK Thermoplastic Composite by Hot-Press Molding and CF/PEEK Composite Using Automated Fiber Placement Process
- Aeronautical Manufacturing Technology Vol. 64, Issue 11, Pages: 50-57(2021)
- 作者机构：
  
  中国商飞北京民用飞机技术研究中心，先进材料结构实验室,北京,102211
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2021.11.050
  CLC：
- Published：2021
- 稿件说明：
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刘亚男，刘晨晓，朱明浩，李来鑫，冯荣欣. 模压成型 CF/PEKK 与自动铺丝 CF/PEEK 热塑性复合材料对比研究[J]. 航空制造技术, 2021, 64(11): 50-57/68.

LIU Ya’nan, LIU Chenxiao, ZHU Minghao, LI Laixin, FENG Rongxin. Comparative Study Between CF/PEKK Thermoplastic Composite by Hot-Press Molding and CF/PEEK Composite Using Automated Fiber Placement Process. Aeronautical Manufacturing Technology, 2021, 64(11): 50-57/68.
刘亚男，刘晨晓，朱明浩，李来鑫，冯荣欣. 模压成型 CF/PEKK 与自动铺丝 CF/PEEK 热塑性复合材料对比研究[J]. 航空制造技术, 2021, 64(11): 50-57/68. DOI： 10.16080/j.issn1671-833x.2021.11.050.

LIU Ya’nan, LIU Chenxiao, ZHU Minghao, LI Laixin, FENG Rongxin. Comparative Study Between CF/PEKK Thermoplastic Composite by Hot-Press Molding and CF/PEEK Composite Using Automated Fiber Placement Process. Aeronautical Manufacturing Technology, 2021, 64(11): 50-57/68. DOI： 10.16080/j.issn1671-833x.2021.11.050.

摘要

以 CF/PEEK 和 CF/PEKK 热塑性复合材料为研究对象，对其适用的低成本模压成型、自动铺丝结合模压两步法原位成型工艺进行初步探索，并对两种热塑性复合材料体系的基本特性、成型质量与性能进行对比分析。首先采用幅宽 305mm 的 CF/PEKK 体系开展模压成型工艺研究，发现冷却速率对短梁强度影响不大，而成型压力对短梁强度有一定影响，在成型压力 2.0MPa、成型温度 370℃、冷却速率 –15℃/min 工艺条件下其短梁强度达到（135.65±4.72）MPa，纤维含量达到 61.8%，成型质量良好。同时对于 6.35mm 宽 CF/PEEK 窄带，初步探索其自动铺丝结合模压两步法原位成型工艺，发现与模压成型 CF/PEKK 同等工艺条件下，所得 CF/PEEK 层合板成型质量良好，破坏模式与 CF/PEKK 体系相近，但是短梁强度较低，微观破坏行为有一定差异。研究结果可为热塑性复合材料应用于航空主承力结构的材料和工艺选择提供基础数据和技术参考。

Abstract

In this paper

adopting CF/PEKK and CF/PEEK thermoplastic composites as research objects

a preliminary comparative study were conducted between the two systems using corresponding process of low-cost hot-press molding and automated fiber placement (AFP) process. The basic characteristics

obtained composites quality and properties of two thermoplastic composites were explored and analyzed. Firstly

hot press molding process of CF/PEKK system with a prepreg width of 305mm was optimized

which showed that its short beam strength is more affected by molding pressure rather than cooling rate. A satisfactory CF/PEKK composite was fabricated using a process with molding pressure of 2.0MPa

heating temperature of 370℃

and cooling rate of –15℃/min

generating a short beam strength up to (135.65±4.72)MPa

with fiber volume fraction of 61.8%. Meanwhile

a novel two step in-situ AFP combined with hot press molding process was preliminary explored using 6.35mm width CF/PEEK narrow thermoplastic prepreg. It is found that obtained CF/PEEK laminates using same process parameters revealed satisfactory surface and internal quality and similar failure mode to that of CF/PEKK system

while showed lower short beam strength and different micro-scale failure behavior. The research results can provide basic data and technical reference for the material and process selection of thermoplastic composite used in future aviation structures.

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