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On the Bonding Strength Degradation by Humidity of Different Titanium-PEEK Interfaces

Schulze, Karola and Hausmann, Joachim and Wielage, Bernhard (2011) On the Bonding Strength Degradation by Humidity of Different Titanium-PEEK Interfaces. 16th International Conference on Composite Structures (ICCS 16), 28.-30. Juni 2011, Porto, Portugal.

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Abstract

Fibre Metal Laminates (FML) consisting of alternating stacked layers of polymer matrix composites and metallic foils are considered for structures with high fracture toughness and good impact resistance in aeronautic applications. The properties of thermoplastic Fibre Metal Laminates composed of titanium and carbon fibre reinforced polyetheretherketone (Ti/CF-PEEK laminates) are under investigation at DLR. The adhesion between the polyetheretherketone (PEEK) matrix and titanium degrades by the influence of humidity. Physical, chemo-physical and chemical surface pre-treatments of the titanium layers were tested to improve the long-term behaviour of the interface. To compare the different surface treatments lap shear specimens were prepared and partly exposed to hot water (80°C). Lap shear tests were conducted to determine the degradation of the initial strength by the influence of water. Concerning the physical pre-treatment the laser pre-treatment offers the highest magnitude of humidity resistance because of the magnitude and kind of surface roughness. Concerning the chemo-physical pre-treatment the anodization offers reduced initial bonding strength and reduced humidity resistance caused by the created oxide layer. Concerning the chemical pre-treatment the usage of adhesion promoter causes enhanced initial bonding strength but also reduced humidity resistance.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:On the Bonding Strength Degradation by Humidity of Different Titanium-PEEK Interfaces
Authors:
AuthorsInstitution or Email of Authors
Schulze, Karolakarola.schulze@dlr.de
Hausmann, Joachimjoachim.hausmann@dlr.de
Wielage, Bernhardbernhard.wielage@mb.tu-chemnitz.de
Date:2011
In Open Access:Yes
Keywords:Fibre metal laminate (FML), Interfaces, Titanium, PEEK, Aging
Event Title:16th International Conference on Composite Structures (ICCS 16)
Event Location:Porto, Portugal
Event Type:international Conference
Event Dates:28.-30. Juni 2011
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Metallic Structures and Hybrid Material Systems
Deposited By: Karola Schulze
Deposited On:06 Dec 2011 16:23
Last Modified:06 Dec 2011 16:23

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