摘要
文章简要介绍了飞秒激光发展过程及其特点,讨论了利用飞秒激光的超快速时间和超高峰值的特性烧蚀加工烟火药剂Mg/PTFE的可行性与安全性。建立了飞秒激光与Mg/PTFE作用过程中的传热模型,根据模型计算了药剂内部的温度分布以及烧蚀反应放出的热量对周围药剂的影响;在本研究的计算条件下,确定了在切割过程中,受激光作用表面的温度可达3000℃以上,单个激光脉冲的作用深度小于5.0×10-7m,药剂反应放出的热量对周边基本上没有影响,因而飞秒激光能够用于Mg/PTFE药剂的加工。
The development process and characteristics of femtosecond laser were introduced briefly, the feasibility and security in ablation of Mg/PTFE composition by femtosecond laser based on its characteristics of ultrafast time and ultrahigh energy peak value were discussed. The heat transfer model in the ablation process of Mg/PTFE composition by femtosecond laser was established first, and the temperature distribution in the composition and the influence of heat released in ablation reaction on the composition were calculated based on the heat transfer model. Temperature in the composition surface processed by femtosecond laser is more than 3000℃, the ablation depth is less than 5.0 × 10^-7m, and there is less influence of the heat released by composition reaction on the surrounding composition during the process of ablation based on the calculation conditions. The Mg/PTFE composition can be machined with femtosecond laser.
出处
《激光与红外》
CAS
CSCD
北大核心
2007年第3期214-216,共3页
Laser & Infrared
关键词
飞秒激光
Mg/PTFE
烧蚀加工
温度分布
femtosecond laser
Mg/PTFE composition
ablation
temperature distribution
