石墨改性环氧树脂抗强激光辐照性能
Laser resistance capability of graphite modified epoxy resin
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摘要: 在激光硬杀伤防护体系研究中，制备了鳞片石墨改性环氧树脂涂层，分析了它与辐照激光能量耦合作用规律，研究了其热烧蚀性能、隔热性能等抗激光辐照性能，并对不同参数激光辐照后该材料的损伤形貌进行宏观、微观分析，确定了损伤阈值与损伤形式。实验结果表明：石墨改性环氧树脂具有优良的抗强激光辐照性能，连续激光辐照下功率密度损伤阈值高于2 kW/cm2；高温下与激光能量耦合系数仅为10%左右，稳定热烧蚀率低至μg/J量级；具备优良的纵向隔热性能，高温下热导率在10 W·K-1·m-1以下；低功率密度激光辐照下损伤形式为轻微氧化，高功率密度激光辐照下则以汽化烧蚀为主；材料制备工艺简单,成本低廉,与被加固材料界面结合良好。Abstract: 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
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Key words:
- graphite /
- epoxy resin /
- laser irradiation /
- energy coupling /
- damage form /
- morphology analysis
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