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Investigation of surface pre-treatments for the structural bonding of titanium
- Publication Year :
- 2012
-
Abstract
- This paper evaluates wet-chemical pre-treatments (alkaline etching, anodising) and a plasma treatment for structural bonding of titanium (Ti6Al4V). The main objective of this study is the comparison of the applicability of the plasma pre-treatment to wet-chemical treatments on titanium for structural bonding. In this context, an atmospheric pressure plasma device was used to deposit thin functional films from hexamethyldisiloxane (HMDSO) precursor on titanium. X-ray photoelectron spectroscopy (XPS) was employed to assess the chemical composition of the surface after different pre-treatments on the titanium substrate, while the morphology and the film thickness were investigated with scanning electron microscopy (SEM). The adhesion properties on titanium were evaluated by means of a wedge test in hot/wet conditions. After bonding tests the fracture surface and the failure loci were analysed. Using a long arc plasma generator and HMDSO precursor almost stoichiometric SiO2 coatings were obtained on the titanium substrate. These coatings exhibit good long-term durability and bond strength compared to an alkaline etching in the wedge test. The investigated anodising process leads to oxide layers revealing a highly porous nanostructure. In contrast to the alkaline etching, the plasma derived coatings and the oxide layer produced by the anodising process exhibit a higher micro, respectively nano roughness, and hence a better long-term durability.
- Subjects :
- Hexamethyldisiloxane
Materials science
Polymers and Plastics
Anodizing
Scanning electron microscope
General Chemical Engineering
Metallurgy
technology, industry, and agriculture
Oxide
Titanium alloy
chemistry.chemical_element
Atmospheric-pressure plasma
surface treatment
atmospheric pressure plasma
wedge test
Biomaterials
chemistry.chemical_compound
X-ray photoelectron spectroscopy
chemistry
titanium and alloys
Composite material
Titanium
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....32998cd0b3015c01e34f4c698f52d4d2