Sorting zamak alloys via chemometric analysis of their LIBS spectra

Aberkane, Sabrina Messaoud; Abdel‐Hamid, Mona; Mokdad, Fatiha; Yahiaoui, K.; Abdelli‐Messaci, S.; Harith, M. A.

doi:10.1039/c7ay01138e

Cited by 21 publications

(9 citation statements)

References 28 publications

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“…The industrial applications of LIBS on copperbased alloys, in contrast, are not particularly numerous. Among the few, one that is worthy of mention is the use of LIBS for determining the composition of industrial copper concentrates proposed by Łazarek et al 113 Zinc-alloys (Zamac) were analyzed using LIBS by Messaoud et al 114…”

Section: Metal Industrymentioning

confidence: 99%

Industrial applications of laser-induced breakdown spectroscopy: a review

et al. 2020

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Section: Metal Industrymentioning

confidence: 99%

Industrial applications of laser-induced breakdown spectroscopy: a review

et al. 2020

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“…However, additional efforts are required to establish appropriate materials methodological approaches for an accurate quantitative LIBS analysis. Previously [9], we have demonstrated the feasibility of using LIBS technique for sorting zinc based alloys, for the first time. We used chemometric methods applied on LIBS spectra registered at a delay and gate time of 2 µs and 1.5 µs, respectively.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal evaluation of plasma parameters during LIBS analysis for on- line sorting of zinc-based alloy

LELLOUCHE

Yahiaoui

Kellou

et al. 2022

Preprint

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In the present work, plasma generated by fundamental radiation from a Q-switched Nd:YAG laser focused onto a zinc based alloy is studied spectroscopically. The quantification of the zinc based alloy using the calibration free- laser induced breakdown spectroscopy (CF-LIBS) is only possible under the assumption of local thermodynamic equilibrium (LTE). In this study, we investigated the spatiotemporal evolution of plasma parameters (Te, Ne) as well as the spatiotemporal evaluation of LTE in order to find regions where LTE is valid. For an accurate plasma temperature estimation, only times ranging from 0.8 µs to 6 µs and for axial distance from 0.6 to 2.6 mm were chosen. The electron temperature values were calculated using the Saha-Boltzmann method applied on neutral and singly ionized copper lines, while the electron number density was calculated using the Stark broadened profile of the Hα line using the relation of Gigosos.

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“…To avoid the inuence of the matrix effect, a before support vector machine was used to model the spectra. [26][27][28] The stability of the system was characterized by comparing the relative standard deviations (RSDs) of Si, Mn, Cr, and Mo aer normalization, and the qualitative performance of the system was characterized by comparing the classication accuracy.…”

Section: Introductionmentioning

confidence: 99%