Investigation on particle formation during laser ablation process with high brilliant radiation
Investigation on particle formation during laser ablation process with high brilliant radiation
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高亮度辐射激光烧蚀过程中颗粒形成的研究
DOI：
10.1016/j.phpro.2010.08.151
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
K. Dickmann
中科院分区：
文献类型：
--
作者：
T. Scholz;K. Dickmann
在激光烧蚀金属的过程中，在蒸汽羽流中形成纳米级颗粒。因此，粒子形成率在很大程度上取决于所使用的激光源的强度。高亮度激光源在连续波工作时，能够产生高于1⋅108W/cm2的强度。由于高亮度激光源在研究和工业应用中的广泛应用，研究粒子形成对烧蚀过程的影响非常重要。因此，本文主要研究了单模光纤激光烧蚀不锈钢过程中颗粒的形成。给出了实验结果并进行了分析。在实验工作中，用探针激光束穿过烧蚀羽流，并对其散射强度进行了分析。TEM图像显示，在1.92⋅108Wcm2的强度下，颗粒的平均粒径为9 nm。
Nanometer sized particles are formed within the vapor plume during the ablation of metal with laser radiation. Thereby, the particle formation rate depends strongly on the used intensity of the laser source. High brilliant laser sources have the ability to generate intensities higher than 1⋅108W/cm2during cw operation. Due to the widespread use of high brilliant laser sources in research and industrial applications, it is important to investigate the influence of particle formation on the ablation process. Therefore, the presented work is focused on the particle formation during the ablation process of stainless steel with a single-mode fiber laser. Results of experimental work are shown and analyzed. In the experimental work a probe laser beam is directed through the ablation plume and the scattered intensity is analyzed. TEM images of particles show an average particle size of 9 nm at an intensity of 1.92⋅108Wcm2.