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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (3): 035502.doi: 10.1088/2058-6272/aa97ce

• Plasma Technology • Previous Articles     Next Articles

Accurate quantitative CF-LIBS analysis of both major and minor elements in alloys via iterative correction of plasma temperature and spectral intensity

Shuxia ZHAO (赵书霞)1,2, Lei ZHANG (张雷)1,2,3, Jiajia HOU (侯佳佳)1,2 , Yang ZHAO (赵洋)1,2, Wangbao YIN (尹王保)1,2,3, Weiguang MA (马维光)1,2 , Lei DONG (董磊)1,2, Liantuan XIAO (肖连团)1,2 and Suotang JIA (贾锁堂)1,2   

  1. 1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, People’s Republic of China 2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, People’s Republic of China
  • Received:2017-09-06 Published:2017-11-01
  • Supported by:

    The work was financially supported by the National Key Research and Development Program of China (No. 2017YFA0304203), the Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China (No. IRT13076), National Natural Science Foundation of China (Nos. 61475093, 61378047, 61775125), the Shanxi ‘1331 Project’ Key Subjects Construction and the Major Special Science and Technology Projects in Shanxi Province (No. MD2016-01). The authors thank the State Key Lab of Power Systems for technical contribution and financial support.

Abstract:

The chemical composition of alloys directly determines their mechanical behaviors and application fiields. Accurate and rapid analysis of both major and minor elements in alloys plays a key role in metallurgy quality control and material classification processes. A quantitative calibration-free laser-induced breakdown spectroscopy (CF-LIBS) analysis method, which carries out combined correction of plasma temperature and spectral intensity by using a second-order iterative algorithm and two boundary standard samples, is proposed to realize accurate composition measurements. Experimental results show that, compared to conventional CF-LIBS analysis, the relative errors for major elements Cu and Zn and minor element Pb in the copper-lead alloys has been reduced from 12%, 26% and 32% to 1.8%, 2.7% and 13.4%, respectively. The measurement accuracy for all elements has been improved substantially.

Key words: spectral intensity, plasma temperature, iterative correction, calibration-free laser-induced breakdown spectroscopy (CF-LIBS)