Journal ArticleDOI
In situ analysis of metal melts in metallurgic vacuum devices by laser-induced breakdown spectroscopy.
J. Gruber,Johannes Heitz,Nikita Arnold,Dieter Bäuerle,Norbert Ramaseder,W. Meyer,J. Hochörtler,F. Koch +7 more
TLDR
Rapid in situ analysis of liquid metal melts under reduced ambient pressure by laser-induced breakdown spectroscopy (LIBS) using a transportable system and the influence of variations in the ambient pressure on the results is discussed.Abstract:
We report on rapid in situ analysis of liquid metal melts under reduced ambient pressure by laser-induced breakdown spectroscopy (LIBS) using a transportable system. LIBS denotes a method in which characteristic optical emission line intensities of excited species in laser-generated plasma plumes are used for a quantitative chemical analysis of target materials. It is a fast, noncontact method that can be carried out under various atmospheric conditions, allowing large working distances between the sample under investigation and the detection system. For these reasons, LIBS is applicable in particular for process control in metallurgy under reduced ambient pressure. This was demonstrated for two types of vacuum devices under production conditions at a steel mill. The results of these experiments, including calibration curves for Cr, Ni, and Mg in liquid steel, are presented. The influence of variations in the ambient pressure on the results of the LIBS analysis is discussed within the frame of a generalized shock-wave model for the expansion of the laser-induced plasma plume.read more
Citations
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Journal ArticleDOI
Correction of self-absorption effect in calibration-free laser-induced breakdown spectroscopy by an internal reference method
Lanxiang Sun,Haibin Yu +1 more
TL;DR: Through the IRSAC method, the points on the Boltzmann plot become more regular, and the evaluations of the plasma temperature and material composition are more accurate than the basic CF-LIBS.
Journal ArticleDOI
Evaluation of self-absorption of manganese emission lines in Laser Induced Breakdown Spectroscopy measurements
F. Bredice,F.O. Borges,Hugo Sobral,Mayo Villagrán-Muniz,H. O. Di Rocco,Gabriele Cristoforetti,Stefano Legnaioli,Vincenzo Palleschi,L. Pardini,Azenio Salvetti,Elisabetta Tognoni +10 more
TL;DR: In this paper, a method for evaluating self-absorption coefficients in LIBS measurements is presented, which does not require the knowledge of Stark coefficients of the lines of interest and can be used for characterization and control of the experimental conditions in which the analysis is performed.
Journal ArticleDOI
Laser-Induced Breakdown Spectroscopy in open-path configuration for the analysis of distant objects
TL;DR: A review of recent results on stand-off laser-induced breakdown spectroscopy (LIBS) analysis and applications is presented in this paper, which only refers to the use of the open-path LIBS configuration in which the laser beam and the returning plasma light are transmitted through the atmosphere.
Journal ArticleDOI
Design, construction and assessment of a field-deployable laser-induced breakdown spectrometer for remote elemental sensing
TL;DR: In this paper, a field-deployable laser-induced breakdown spectrometer for measurements in the hundreds of meters range has been presented, which is capable of elemental analysis with no previous preparation and in near real time, with the only requirement of a free line-of-sight between the instrument and the sample.
Journal ArticleDOI
In situ analysis of steel melt by double-pulse laser-induced breakdown spectroscopy with a Cassegrain telescope
TL;DR: In this article, a laser-induced breakdown spectroscopy (LIBS) system combining a Cassegrain telescope and a double-pulse laser mode was developed for the in situ analysis of steel melt.
References
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Book
Laser Processing and Chemistry
TL;DR: In this paper, the authors provide an overview and fundamentals of Lasers in Medicine, Biotechnology and Arts: Lasers In Medicine and Biotechnology, Restoration and Conservation of Artworks.
Journal ArticleDOI
Laser-induced breakdown spectrometry — applications for production control and quality assurance in the steel industry
Reinhard Noll,Holger Bette,Adriane Brysch,Marc Oliver Kraushaar,Ingo Mönch,László Péter,Volker Sturm +6 more
TL;DR: In this paper, a laser-induced breakdown spectrometry (LIBS) was used to detect light and heavy elements in slag samples in the steel making and processing industry.
Journal ArticleDOI
In uence of ambient conditions on the laser air spark
Journal ArticleDOI
Laser-induced breakdown spectroscopy of steel samples using multiple Q-switch Nd:YAG laser pulses
R. Sattmann,V. Sturm,R. Noll +2 more
TL;DR: In this article, double and multiple Q-switch Nd:YAG laser pulses are used to vaporize material from solid steel samples and to induce a plasma, and the material ablation of different pulse bursts, emission intensities of iron lines and electron temperatures and densities are determined.
Journal ArticleDOI
A comparison of nanosecond and femtosecond laser-induced plasma spectroscopy of brass samples
TL;DR: In this paper, the ablation of brass samples in argon shield gas by 170 fs and 6 ns laser pulses has been studied by optical emission spectroscopy of the evolving plasmas.