原位自动纤维铺放碳纤维增强低熔聚芳醚酮层压板的特性,第 1 部分:生产影响因素

IF 2.3 3区 材料科学 Q3 MATERIALS SCIENCE, COMPOSITES Journal of Composite Materials Pub Date : 2024-04-15 DOI:10.1177/00219983241244882
Ines Mössinger, Lukas Raps, Daniel Fricke, Jonathan Freund, Miriam Löbbecke, Ashley R Chadwick
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引用次数: 0

摘要

本研究对使用新型碳纤维增强低熔点聚芳醚酮聚合物材料制造的自动纤维贴装层压板的机械和热性能以及微观结构进行了研究。与现有的高温热塑性材料(如 PEEK)相比,这种材料的熔化温度更低,熔体粘度也更低,这为自动纤维贴放工艺提供了有利的特性。这项工作旨在研究原位固结以及加热工具和后处理回火步骤的影响,这两种方法在之前的研究中都证明很有前途。使用冷模具、加热模具配置、带有后续回火工艺步骤的冷模具和热压参考层压板制造了层压板。差示扫描量热法显示,与冷模具相比,加热模具和后处理回火配置的结晶度值增加了一倍多,分别达到 24% 和 30%。机械强度值显示层间剪切强度和压缩强度有所提高,但与结晶度提高的预期程度不同。扫描电子显微镜可以检测到聚合物基体微观结构的差异。后处理回火步骤主要导致片状结晶结构,而加热模具配置和后处理热压则导致结晶球状体占主导地位,这可能会对机械性能产生积极影响。计算机断层扫描显示,在原位制造的样品和未加工的胶带材料中存在大量孔隙,这可能会减轻结晶度增加带来的积极影响。
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Characteristics of in-situ automated fiber placement carbon-fiber-reinforced low-melt polyaryl ether ketone laminates part 1: Manufacturing influences
This study presents an investigation into mechanical and thermal properties, as well as the microstructure of Automated Fiber Placement-manufactured laminates using a novel carbon fiber-reinforced low-melt polyaryl ether ketone polymer material. The material’s lower melting temperature and lower melt viscosity as compared to established high-temperature thermoplastic materials as PEEK, promises favourable characteristics for the Automated Fiber Placement process. This work aims at in-situ consolidation and the influence of a heated tooling and a post process tempering step, which both turned out to be promising in previous investigations. Laminates were manufactured using a cold tooling, a heated tooling configuration, a cold tooling with a subsequent tempering process step and a hot-pressed reference laminate. Differential Scanning Calorimetry showed that crystallinity values more than doubled for the heated tooling and post process tempering configurations, compared to the cold tooling, reaching 24% and 30%, respectively. Mechanical strength values showed an increase in interlaminar shear strength and compression strength but did not increase to the same extent as was expected from the increase in crystallinity. With Scanning Electron Microscopy differences in the microscopic structure of the polymer matrix could be detected. While the post process tempering step leads to a mostly lamellar crystalline structure, the heated tooling configuration and the post process hot pressing induce a predominance of crystalline spherulites, which might positively affect the mechanical performance. Computed Tomography scans revealed a high amount of porosity in the in-situ-manufactured samples and unprocessed tape material, which likely mitigated the positive effect of increased crystallinity.
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来源期刊
Journal of Composite Materials
Journal of Composite Materials 工程技术-材料科学:复合
CiteScore
5.40
自引率
6.90%
发文量
274
审稿时长
6.8 months
期刊介绍: Consistently ranked in the top 10 of the Thomson Scientific JCR, the Journal of Composite Materials publishes peer reviewed, original research papers from internationally renowned composite materials specialists from industry, universities and research organizations, featuring new advances in materials, processing, design, analysis, testing, performance and applications. This journal is a member of the Committee on Publication Ethics (COPE).
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