Effects of Laser Ablation on Electrical Properties of Quartz Fiber/Epoxy Wave-Transmitting Material

Modeling the microwave transmittance of glass fiber-reinforced plastics subjected to laser ablation

“…1,2 Therefore, several studies have investigated the microwave transmittance of GFRP subjected to laser ablation. [3][4][5][6][7][8] The epoxy matrix in GFRP is thermally unstable and decomposes into char-like products within a temperature range of ∼300°C to 500°C. 9 The char-like product consists of amorphous carbon (carbon without crystalline structure).…”

“…Several organic groups exist, such as ─OH, C─H, and C─O. 6 The infrared laser absorption of a char-like product can increase by two orders of magnitude, leading to a bulk-to-surface absorption transition. 5,10 However, the notable enhancement in absorption to microwave is observed at a higher temperature of ∼900°C.…”

“…Several experiments have been performed to investigate the change in the microwave transmittance of GFRP under laser ablation. 4,6,8 However, a proper predictive model is still lacking because of the lack of knowledge on the relationship between GFRPs thermal and dielectric properties. The volume fraction of pyrolysis products was associated with the radius of the circular carbon particles 7 in the novel work of Semak and Miller.…”

“…Therefore, several studies have investigated the microwave transmittance of GFRP subjected to laser ablation 3 – 8…”

“…The char-like product consists of amorphous carbon (carbon without crystalline structure). Several organic groups exist, such as ─OH, C─H, and C─O 6 . The infrared laser absorption of a char-like product can increase by two orders of magnitude, leading to a bulk-to-surface absorption transition 5 , 10 .…”