Table 1 Mechanical Testing and Adhesion Data for PEI and UFG/PEI Coatings on AA 7075.
Sample | nanoindentation elastic modulus (GPa) | nanoindentation hardness (MPa) | ASTM D4541-09 (pull off) | ASTM D3359 (tape) | ASTM D2197-13 (scrape) |
|---|---|---|---|---|---|
PEI | 5.07 ± 0.25 | 410 ± 40 | no failure | 5B | >10 kg |
1 wt.% UFG/PEI | 5.50 ± 0.33 | 443 ± 10 | no failure | 5B | >10 kg |
3 wt.% UFG/PEI | 5.48 ± 0.40 | 426 ± 60 | no failure | 5B | >10 kg |
5 wt.% UFG/PEI | 5.53 ± 0.08 | 418 ± 50 | no failure | 5B | >10 kg |
