Investigation of surface pre-treatments for the structural bonding of titanium

Mertens, Tobias; Gammel, F.; Kolb, M.; Rohr, O.; Kotte, Liliana; Tschöcke, Sebastian; Kaskel, Stefan; Krupp, Ulrich

doi:10.1016/j.ijadhadh.2011.12.007

Cited by 52 publications

(43 citation statements)

References 13 publications

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“…However, most evident is a thin gap for the steel substrate, right below the nano-structure at the interface to the bulk material. Similar to previous investigations [17,35], micrographs do not reveal a nanoscaled morphology for alkaline or acid etched surfaces. The wet chemical process applied on stainless steel leads to a smooth and flat surface, not creating porous microstructure.…”

Section: Figure 4: Reinforcement Fracture Surfacessupporting

confidence: 88%

“…The wet chemical process applied on stainless steel leads to a smooth and flat surface, not creating porous microstructure. Exposure of SAE 304 to a pickling environment impedes oxide layer formation due to its chromium dissolving characteristic [36], whereas for a titanium α+β-alloy oxide thicknesses of 20-30 nm were documented [35].…”

Section: Figure 4: Reinforcement Fracture Surfacesmentioning

confidence: 99%

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Interfacial phenomena in metallic z-reinforced CFRP joints after hygrothermal ageing

Jürgens¹

2017

Zeitschrift Kunststofftechnik

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Section: Figure 4: Reinforcement Fracture Surfacessupporting

confidence: 88%

Section: Figure 4: Reinforcement Fracture Surfacesmentioning

confidence: 99%

Interfacial phenomena in metallic z-reinforced CFRP joints after hygrothermal ageing

Jürgens¹

2017

Zeitschrift Kunststofftechnik

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“…The depth profile shows that after first few minutes the carbon content is reduced to 3-5 at%. This value is caused by plasma fragmentation/polymerization of the HMDSO precursor [2]. The availability of the Si-CH3 group is necessary to achieve a good adhesion of titanium alloys [2].…”

Section: Resultsmentioning

confidence: 99%

“…This value is caused by plasma fragmentation/polymerization of the HMDSO precursor [2]. The availability of the Si-CH3 group is necessary to achieve a good adhesion of titanium alloys [2]. Figure 5 shows that the surface, treated at 2 cm working distance and 50 nm nominal oxide thickness, exhibits no Si-CH3 groups for both titanium alloys.…”

Section: Resultsmentioning

confidence: 99%

“…All titanium samples are processed with the same conditioning steps prior to the plasma process: cleaning with the alkaline cleaner using P3 Almeco 18 (Henkel AG and co. KGaA, Düsseldorf, Germany) at 65 ± 3 °C for 15 min, alkaline etching with Turco 5578 (Henkel AG and co. KGaA, Düsseldorf, Germany) at 95 ± 3 °C for 5 min using a concentration of 500 g/L [2].…”

Section: Surface Preparationmentioning

confidence: 99%

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Atmospheric Plasma Deposition of SiO2 Films for Adhesion Promoting Layers on Titanium

Kotte

Haag

Mertens

et al. 2014

Metals

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This paper evaluates the deposition of silica layers at atmospheric pressure as a pretreatment for the structural bonding of titanium (Ti6Al4V, Ti15V3Cr3Sn3Al) in comparison to an anodizing process (NaTESi process). The SiO2 film was deposited using the LARGE plasma source, a linearly extended DC arc plasma source and applying hexamethyldisiloxane (HMDSO) as a precursor. The morphology of the surface was analyzed by means of SEM, while the characterization of the chemical composition of deposited plasma layers was done by XPS and FTIR. The long-term durability of bonded samples was evaluated by means of a wedge test in hot/wet condition. The almost stoichiometric SiO2 film features a good long-term stability and a high bonding strength compared to the films produced with the wet-chemical NaTESi process.

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Extended DC arc atmospheric pressure plasma source for large scale surface cleaning and functionalization

Kotte

Mäder

Roch

et al. 2018

Contributions to Plasma Physics

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Plasma technologies at atmospheric pressure (AP) promise efficient integration into industrial manufacturing technology and save considerable investment and maintenance costs. The development of new fields of application of AP techniques increasingly requires the provision of adapted, large‐area plasma sources. The linearly extended direct current (DC) arc plasma source, long arc generator principle (LARGE) for short, with a working width of up to 350 mm was developed at the Fraunhofer IWS for the large area plasma surface treatment. In contrast to other jet‐based AP sources arrays, the LARGE plasma source has a very long afterglow flame length, which makes it possible to efficiently treat surfaces over the range ±40 mm. Especially for large‐area plasma applications, commercial jet nozzle arrays are very complex to control and require more than one power generators which increases the equipment cost. In this paper we discuss selected application fields, namely the rapid (up to 50 m/min) removal of oil films on aluminium sheets, the large‐area functionalization (removal of release agents) of carbon‐fibre reinforced plastic (CFRP) materials, and the deposition of SiO2 adhesive layers on titanium to improve adhesion in the structural bonding of these materials.

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Investigation of surface pre-treatments for the structural bonding of titanium

Cited by 52 publications

References 13 publications

Interfacial phenomena in metallic z-reinforced CFRP joints after hygrothermal ageing

Interfacial phenomena in metallic z-reinforced CFRP joints after hygrothermal ageing

Atmospheric Plasma Deposition of SiO2 Films for Adhesion Promoting Layers on Titanium

Extended DC arc atmospheric pressure plasma source for large scale surface cleaning and functionalization

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