航空复合涂层材料的激光烧蚀效应  

Laser ablation effect of composite coating applied to aerospace material

作　　者：李静[1] 郑轶[2] 罗晋[2] 陈松林[2] 关振威[1] 梁璐[1] 

机构地区：[1]中航工业北京航空材料研究院,北京100095 [2]成都精密光学工程研究中心,成都610041

出　　处：《强激光与粒子束》2014年第2期303-308,共6页High Power Laser and Particle Beams

摘　　要：针对航空激光防护技术研究需求,开展了复合涂层材料的激光烧蚀效应综合研究。采用圆棒固体激光器作为测试光源,搭建了具有在线温度测量功能的烧蚀实验平台。在此基础上,对聚碳硅烷(PCS)涂层样品开展了激光烧蚀实验。通过对烧蚀区域形貌和温度数据的对比分析,证明了PCS复合材料具备显著的激光防护作用。同时,从理论方面对涂层的激光防护机理进行了研究,基于材料热传导方程,建立了激光烧蚀过程的热力学模型,对温度场变化进行了模拟。研究结果表明,在复合涂层的保护下,kW级激光仅产生百℃的金属基底升温。This paper concentrates on the measurement and analysis of laser ablation effect of particularly prepared aerospace material, polycarbosilane （PCS）. Laser ablation experiment setup is designed and built, based on a continuous-wave high-power solid state laser （CWHPSSL）. Metal-shell samples with composite PCS are prepared. Then a group of laser ablation experiments are performed on those samples. ,They are processed by laser beam with thousands of W/cm2. The results, including the ablation morphology and temperature data, are shown and discussed. Temperature data give a good demonstration of the protection effect of composite coating, and in the meanwhile the mino^morphologies in the ablated region hint the principle of PCS laser-proof effect. After that, a theoretical investigation is carried out. Fourier equation of heat conduction is applied to modeling the temperature field during ablation process. The simulation provides a good explanation on the principle of laser-proof effect of PCS composite coating. The results demonstrate that, with the protection of PCS composite coating, kilowatt-level laser only results in hundreds of Celeius temperature increment of steel substrate.

关 键 词：激光烧蚀 激光防护 复合材料 航空材料 固体激光 

分 类 号：TN246[电子电信—物理电子学]