| Affiliation: | 1. CIRIMAT, Université de Toulouse, CNRS, Physique des Polymères, 118 route de Narbonne 31062, Toulouse cedex 09, France
Institut de Recherche Technologique (IRT) Saint Exupéry, 3 rue Tarfaya, CS 34436 31405 Toulouse cedex 4, France;2. CIRIMAT, Université de Toulouse, CNRS, Physique des Polymères, 118 route de Narbonne 31062, Toulouse cedex 09, France;3. Institut de Recherche Technologique (IRT) Saint Exupéry, 3 rue Tarfaya, CS 34436 31405 Toulouse cedex 4, France |
| Abstract: | A new kind of high electrical conductive epoxy coating with low filler rate was investigated for lightning strike protection (LSP) of carbon fiber reinforced polymer (CFRP). The coating without CFRP substrate was firstly studied. The influence of silver submicronic wires (AgSWs) with a high aspect ratio on the electrical behavior is observed; that is, the electrical resistivity evolution, the current density value, and the electrical conduction mechanisms as function of temperature. The preponderant electrical conduction mechanism is an Ohmic behavior. The higher level of conductivity obtained is 5.5 × 105 S m?1 for 9% vol of AgSWs. Lightning strike tests were carried out on an epoxy/AgSWs coating filled with 8% in volume (74 gsm) and deposited on a CFRP. The ultrasonic testing after lightning strike on coated CFRP shows no structural delamination and demonstrates the interest of this new route for an efficient LSP. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 137, 48700. |
