Atmospheric pressure plasma activation as a surface pre-treatment for the adhesive bonding of aluminum 2024
| Autor: | Hang Yu, Thomas S. Williams, Robert F. Hicks |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Materials science
Atmospheric pressure Adhesive bonding Bond strength Plasma activation chemistry.chemical_element Atmospheric-pressure plasma Surfaces and Interfaces General Chemistry Surfaces Coatings and Films Contact angle chemistry X-ray photoelectron spectroscopy Mechanics of Materials Aluminium Materials Chemistry Composite material |
| Zdroj: | Journal of Adhesion Science and Technology. 28:653-674 |
| ISSN: | 1568-5616 0169-4243 |
| DOI: | 10.1080/01694243.2013.859646 |
| Popis: | A low-temperature, atmospheric pressure helium and oxygen plasma has been used for the surface preparation of aluminum 2024 prior to adhesive bonding. The plasma converted the aluminum from a water contact angle (WCA) of 79° to down to 38° within 5 s of exposure, while sanding reduced the WCA to only 51°. Characterization of the aluminum surface by X-ray photoelectron spectroscopy revealed a decrease in carbon contamination from 70 to 36% and an increase in the oxygen content from 22 to 50% following plasma treatment. Similar trends were observed for sanded surfaces. Lap shear results demonstrated bond strengths of 30 ± 2 MPa for the sanded aluminum vs. 33 ± 1 MPa for plasma-treated aluminum, where sol–gel and primer coatings were added to the surface preparation. Following seven days of aging, wedge crack extension tests revealed cohesive failure percentages of 86, 92, and 96% for sanded, plasma-treated, and sanded/plasma-treated aluminum, respectively. These results indicate that atmospheric pressure pl... |
| Databáze: | OpenAIRE |
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