EXCIMER LASER ABLATING OF LIQUID CRYSTAL POLYMER  

作　　者：梅胜敏[1] 左敦稳[1] 余大民[2] 

机构地区：[1]南京航空航天大学机电工程学院 [2]香港理工大学制造工程系

出　　处：《Transactions of Nanjing University of Aeronautics and Astronautics》1998年第2期72-77,共6页南京航空航天大学学报（英文版）

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。

关 键 词：laser processing ablation POLYMER excimer laser 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]