为了研究激光辐照过程中芳纶纤维/环氧和碳纤维/环氧两种复合材料吸收特性的变化情况,采用双积分球-光电管测试系统和对实验回收样品进行微观分析的方法,得到了两种复合材料在1.319μm连续激光辐照过程中吸收率的变化结果。在烧蚀前,材料的吸收率随激光功率增大而缓慢减小,芳纶纤维/环氧材料从0.6减小到0.55,碳纤维/环氧材料从0.85减小到0.8;当材料发生烧蚀时,芳纶纤维/环氧材料的吸收率迅速增大,而碳纤维/环氧材料的吸收率无明显变化。结果表明,烧蚀对芳纶纤维/环氧材料的吸收特性影响较大,对碳纤维/环氧材料无明显影响。

The absorption characteristics of polyaryl amide-fibers/epoxy and carbon-fibers/epoxy composite radiated by continuous wave laser beam at of 1.319μm were obtained by means of double integrating spheres-photodiode system and micro-analysis of recovery specimen.When laser power intensity increases before composite ablation,the absorptive of both the composites slowly decreases.It changes from 0.6 to 0.55 for polyaryl amide-fibers/epoxy composite and from 0.85 to 0.8 for carbon-fibers/epoxy composite.When ablation appears on the composite,the absorptivity of polyaryl amide-fibers/epoxy composite rapidly increases.However,it change little for carbon-fibers/epoxy composite.The results show that ablation has obvious effect on the absorption characteristics of polyaryl amide-fibers/epoxy composite and has little effect on carbon-fibers/epoxy composite.