Atmospheric pressure plasma effects on the adhesive bonding properties of stainless steel and epoxy composites
| Autor: | Robert F. Hicks, Po-Ching Yeh, Jenn-Ming Yang, Hang Yu, Thomas S. Williams |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Materials science
Adhesive bonding Atmospheric pressure Mechanical Engineering Plasma activation fungi Composite number technology industry and agriculture chemistry.chemical_element Atmospheric-pressure plasma Adhesion Epoxy chemistry Mechanics of Materials visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Composite material Helium |
| Zdroj: | Journal of Composite Materials. 48:219-233 |
| ISSN: | 1530-793X 0021-9983 |
| Popis: | An atmospheric pressure helium and oxygen plasma has been used for the surface preparation of 410 stainless steel and carbon-fiber epoxy laminates prior to bonding to themselves or to each other. Lap shear results for stainless steel coupons and carbon-fiber epoxy laminates demonstrated an 80% and a 150% increase in bond strength, respectively, after plasma activation. Following 7 days of aging, wedge crack extension tests revealed a crack extension length of 7.0 mm and 2.5 mm for the untreated and plasma-activated steel. The untreated stainless steel had 30% cohesive failure compared to 97% for steel activated with the plasma. Surface analysis by X-ray photoelectron spectroscopy showed that carbonaceous contamination was removed by plasma treatment, and specific functional groups, e.g. carboxylic acids, were formed on the surface. These functional groups promoted strong chemical bonding to the epoxy film adhesive. Atmospheric pressure plasmas are an attractive alternative to abrasion techniques for surface preparation prior to bonding. |
| Databáze: | OpenAIRE |
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