期刊
PLASMA SCIENCE & TECHNOLOGY
卷 20, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2058-6272/aa97ce
关键词
spectral intensity; plasma temperature; iterative correction; calibration-free laser-induced breakdown spectroscopy (CF-LIBS)
资金
- National Key Research and Development Program of China [2017YFA0304203]
- Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China [IRT13076]
- National Natural Science Foundation of China [61475093, 61378047, 61775125]
- Shanxi '1331 Project' Key Subjects Construction
- Major Special Science and Technology Projects in Shanxi Province [MD2016-01]
- State Key Lab of Power Systems
The chemical composition of alloys directly determines their mechanical behaviors and application fields. 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.
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