摘要
Ablation experiments of A950 Liquid Crystal Polymer (LCP), as a kind of typical matrix of fibre reinforced polymer composites, are carried out in this paper. Data on the ablation of A950 LCP by excimer laser at 248 nm are presented. The experimental results show that the ablation depth is a linear function of the number of pulse at constant laser fluence, The ablation rate varies with the logorithm of the fluence in a linear manner at different fluences. A satisfactory linear relationship is found between ablation energy and incident fluence. Perhaps due to the plume absorption and thermal effect, the ablation rate varies complicatedly with pulse repetition frequency.
利用波长为２４８ｎｍ的ＫｒＦ准分子激光对液晶聚合物材料进行了融蚀实验。系统研究了单位脉冲融蚀率及材料单位体积融蚀能量与入射激光能量密度之间的关系。结果表明，在恒定的激光能量密度下，融蚀深度与激光的脉冲数成正比。融蚀率是能量密度对数值的线形函数。单位体积融蚀能量与激光脉冲能量密度成正比。此外，由于热效应和加工所产生等离子体对激光能量吸收等因素的影响，融蚀率还与激光脉冲重复频率有关。
