Journal
PLASMA SCIENCE & TECHNOLOGY
Volume 20, Issue 3, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2058-6272/aa97ce
Keywords
spectral intensity; plasma temperature; iterative correction; calibration-free laser-induced breakdown spectroscopy (CF-LIBS)
Categories
Funding
- 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
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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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