Quantitative analysis of C, Si, Mn, Ni, Cr and Cu in low-alloy steel under ambient conditions via laser-induced breakdown spectroscopy  

作　　者：Dan LUO Ying LIU Xiangyu LI Zhenyang ZHAO Shigong WANG Yong ZHANG 罗丹;刘英;李香宇;赵珍阳;王世功;张勇(Guobiao（Beijing）Test ＆ Certification Co.,Ltd,Beijing 100088,People＇s Republic of China;Naval Aviation University,Yantai 264001,People＇s Republic of China;Shandong Dongyi Photoelectric Instruments Co.,Ltd,Yantai 264670,People＇s Republic of China)

机构地区：[1]Guobiao (Beijing) Test & Certification Co., Ltd, Beijing 100088, People's Republic of China [2]Naval Aviation University, Yantai 264001, People's Republic of China [3]Shandong Dongyi Photoelectric Instruments Co., Ltd, Yantai 264670, People's Republic of China

出　　处：《Plasma Science and Technology》2018年第7期152-158,共7页等离子体科学和技术（英文版）

基　　金：supported by the Development Fund of National Autonomous Demonstration Innovation Zone of Shandong Peninsula(Grant No.ZCQ17104);the National Key Research and Development Program of China(Grant No.2017YFB0305400);‘double hundred plan’ Yantai talent funding project

摘　　要：A diode-pumped solid-state laser （DPSSL） with a high energetic stability and long service life is applied to ablate the steel samples instead of traditional Nd：YAG laser pumped by a xenon lamp, and several factors, such as laser pulse energy, repetition rate and argon flow rate, that influence laser-induced breakdown spectroscopy （LIBS） analytical performance are investigated in detail. Under the optimal experiment conditions, the relative standard deviations for C, Si, Mn, Ni, Cr and Cu are 3.3%-8.9%, 0.9%-2.8%, 1.2%-4.1%, 1.7%-3.0%, 1.1%-3.4% and 2.5%-8.5%, respectively, with the corresponding relative errors of 1.1%-7.9%, 1.0%-6.3%, 0.4%-3.9%, 1.5%-6.3%, 1.2%-4.0% and 1.2%-6.4%. Compared with the results of the traditional spark discharge optical emission spectrometry technique, the analytical performance of LIBS is just a little inferior due to the less stable laser-induced plasma and smaller amount of ablated sample by the laser. However, the precision, detection limits and accuracy of LIBS obtained in our present work were sufficient to meet the requirements for process analysis. These technical performances of higher stability of output energy and longer service life for DPSSL, in comparison to the Q-switch laser pumped by xeon lamp, qualify it well for the real time online analysis for different industrial applications.A diode-pumped solid-state laser （DPSSL） with a high energetic stability and long service life is applied to ablate the steel samples instead of traditional Nd：YAG laser pumped by a xenon lamp, and several factors, such as laser pulse energy, repetition rate and argon flow rate, that influence laser-induced breakdown spectroscopy （LIBS） analytical performance are investigated in detail. Under the optimal experiment conditions, the relative standard deviations for C, Si, Mn, Ni, Cr and Cu are 3.3%-8.9%, 0.9%-2.8%, 1.2%-4.1%, 1.7%-3.0%, 1.1%-3.4% and 2.5%-8.5%, respectively, with the corresponding relative errors of 1.1%-7.9%, 1.0%-6.3%, 0.4%-3.9%, 1.5%-6.3%, 1.2%-4.0% and 1.2%-6.4%. Compared with the results of the traditional spark discharge optical emission spectrometry technique, the analytical performance of LIBS is just a little inferior due to the less stable laser-induced plasma and smaller amount of ablated sample by the laser. However, the precision, detection limits and accuracy of LIBS obtained in our present work were sufficient to meet the requirements for process analysis. These technical performances of higher stability of output energy and longer service life for DPSSL, in comparison to the Q-switch laser pumped by xeon lamp, qualify it well for the real time online analysis for different industrial applications.

关 键 词：laser-induced breakdown spectroscopy （LIBS） diode-pumped solid-state laser（DPSSL） optical emission spectrometry laser-induced plasma 

分 类 号：TN241[电子电信—物理电子学] O433[机械工程—光学工程]