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Analysis and development of a brazing method to weld carbon fiber-reinforced poly ether ketone ketone with amorphous PEKK

Kotzur, Karola and Doll, Georg and Herrmann, Peter (2022) Analysis and development of a brazing method to weld carbon fiber-reinforced poly ether ketone ketone with amorphous PEKK. Advanced Manufacturing: Polymer and Composites Science, 8 (3). Taylor & Francis. doi: 10.1080/20550340.2022.2122119. ISSN 2055-0340.

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Official URL: https://www.tandfonline.com/doi/full/10.1080/20550340.2022.2122119

Abstract

n this study, a brazing method for carbon fiber-reinforced poly ether ketone ketone (CF-PEKK) is developed that allows welding below the melting temperature of the single components. During the manufacturing of CF-PEKK laminates, a pseudo-amorphous PEKK film is consolidated to its surface which acts as interlayer polymer during subsequent joining (brazing). Five different brazing temperatures, determined from thermal analysis of the material, are characterized for their weld quality mechanically, analytically, and through ultrasonic testing. Microanalytically Scanning Electron Microscope (SEM) investigations focus on the morphology of the weld zone in order to evaluate the diffusion processes at the interfaces. Compared to Differential Scanning Calorimetry measurements, the SEM investigations offer a basic understanding of the welded process and its influence on the welding properties. A welding temperature of 60 °C below the processing temperature of CF-PEKK laminates (380 °C) is shown to yield a welding factor of 0.93. Furthermore, based on the SEM investigation, it is possible to derive more promising improvement measures for the brazing method.

Item URL in elib:https://elib.dlr.de/190398/
Document Type:Article
Title:Analysis and development of a brazing method to weld carbon fiber-reinforced poly ether ketone ketone with amorphous PEKK
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Kotzur, KarolaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Doll, GeorgUNSPECIFIEDhttps://orcid.org/0000-0002-5961-6593UNSPECIFIED
Herrmann, PeterBT-BGFUNSPECIFIEDUNSPECIFIED
Date:19 September 2022
Journal or Publication Title:Advanced Manufacturing: Polymer and Composites Science
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:8
DOI:10.1080/20550340.2022.2122119
Publisher:Taylor & Francis
ISSN:2055-0340
Status:Published
Keywords:PEKK, Thermoplastic, Brazing, welding
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - Structural Materials and Design
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Design and Manufacture Technologies
Institute of Materials Research > Metallic Structures and Hybrid Material Systems
Deposited By: Doll, Georg
Deposited On:21 Nov 2022 09:45
Last Modified:29 Nov 2022 14:26

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