Laser resistance capability of graphite modified epoxy resin

Graphitemodified epoxy resin was prepared, the mechanisms of energy coupling between the modified epoxy resin and laser were discussed, and the laser resistance capability of the resin was studied. Damage morphologies of the resin irradiated by laser of different parameters were analyzed, and the ablation threshold and damage forms were confirmed. The results indicate that irradiated by continuous wave laser, the resin has a ablation threshold higher than 2 kW/cm2. The energy coupling coefficient is only about 10%, the thermal-ablation rate is as low as several μg/J, and the longitudinal adiabatic capability is excellent, with the thermal conductance lower than 10 W·K-1·m-1. At lower power density, the ablation of the resin is caused by slight oxidation, while it is caused by vaporizati