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Laser-induced chemical modification and nanostructuring of metal surfaces for optimal adhesive bonding to thermoplastic polymers: the interface between TWIP steel and PEEK

Haubrich, Jan und Kramer, Eugen und Hausmann, Joachim (2014) Laser-induced chemical modification and nanostructuring of metal surfaces for optimal adhesive bonding to thermoplastic polymers: the interface between TWIP steel and PEEK. Euro Hybrid Materials and Structures 2014, 10.-11. April 2014, Stade.

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Kurzfassung

Surface preparation methods play a major role in many technical applications such as paint and anti-corrosion coating or adhesive joining. They are crucial for producing reliable surfaces that allow the formation of adhesive bonds with high initial strengths and high long-term stability in degrading environments. The surface preparation methods depend strongly on the material combination and the operating conditions that the joint will be exposed to. Bonding metals to thermoplastic polymers (e.g. PEEK) is a particular challenge that poses high requirements towards the chemical and structural surface properties. Contrary to chemically consolidating adhesives, thermoplastic polymers are commonly assumed to bond only via mechanical interlocking and weaker physical interactions. Previous studies showed that Nd:YAG-laser-treatments allow the formation of strong Titanium-PEEK-interfaces with high degradation resistance against humidity. The goal of our present research aims at transferring the methodology to steel-PEEK interfaces and developing a fundamental understanding of the underlying processes and problems. The knowledge of the interface’s and the laser-generated oxide film’s properties, the nature of mechanical, physical and chemical bonds formed, and the degradation processes is a prerequisite for systematic furthering of adhesive technologies for new materials and applications. In this study we report the first results obtained on laser-treated surfaces of highly ductile high-strength TWIP-steel and the adhesion properties to PEEK. Fracture-mechanical studies by means of single-lap-shear (SLS) and degradation experiments were performed with regard to the laser process parameters. Electron-microscopy showed the formation of oxide films upon laser irradiation in ambient atmosphere. Further investigation of the SLS fracture surfaces implied the occurrence of different failure mechanisms. Chemically-sensitive scanning electron microscopy allowed the differentiation between “apparent” adhesive failure as detected with a light-microscope and pseudo-adhesive failure in the PEEK-interface region by means of residual PEEK. These, besides large areas of cohesive failure, indicate a strong bonding to the functionalized metal.

elib-URL des Eintrags:https://elib.dlr.de/91722/
Dokumentart:Konferenzbeitrag (Poster)
Titel:Laser-induced chemical modification and nanostructuring of metal surfaces for optimal adhesive bonding to thermoplastic polymers: the interface between TWIP steel and PEEK
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Haubrich, JanJan.Haubrich (at) dlr.dehttps://orcid.org/0000-0002-5748-2755NICHT SPEZIFIZIERT
Kramer, EugenEugen.Kramer (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Hausmann, Joachimjoachim.hausmann (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:April 2014
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Adhesion, adherend, surface pre-treatment, pulsed laser, ageing, HSD, TWIP steel, polymer, polyetheretherketone (PEEK)
Veranstaltungstitel:Euro Hybrid Materials and Structures 2014
Veranstaltungsort:Stade
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:10.-11. April 2014
Veranstalter :DGM
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Strukturen und Werkstoffe (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Werkstoff-Forschung > Metallische Strukturen und hybride Werkstoffsysteme
Hinterlegt von: Haubrich, Jan
Hinterlegt am:11 Nov 2014 14:30
Letzte Änderung:29 Mär 2023 00:21

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