Research Article
Cold Plasma Pretreatment of Carbon Fibre Composite Substrates to Improve Adhesive Bonding Performance
Table 4
Mode of failure of the adhesive joints with different surface treatments of the substrates.
| |
Surface treatment | Mode of failure | Standard deviation (%) |
| |
No treatment | 100% adhesive | — | |
Solvent treatment | 100% adhesive | — | |
Abrasion | 25 % cohesive in adhesive | 10 | |
Plasma treatment | | |
| | Power input (W) | Time (s) | | |
| | 100 | 5 | 100% adhesive | — | | 100 | 60 | 100% adhesive | — | | 100 | 180 | 100% adhesive | — | | 100 | 300 | 100% adhesive | — | | 100 | 450 | — | — | | 100 | 600 | — | — | | 200 | 5 | 15% cohesive in adhesive | 5 | | 200 | 60 | 48% cohesive in adhesive | 8 | | 200 | 180 | 53% cohesive in adhesive | 12 | | 200 | 300 | 95% cohesive in adhesive | 4 | | 200 | 450 | 98% cohesive in adhesive | 2 | | 200 | 600 | 52% cohesive in adhesive | 13 |
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