Optical emission characterization of CH4+H2discharges for diamond deposition

1993 ◽  
Vol 74 (6) ◽  
pp. 3752-3757 ◽  
Author(s):  
C. Gomez‐Aleixandre ◽  
O. Sanchez ◽  
A. Castro ◽  
J. M. Albella
Keyword(s):  
Optical Emission ◽  
Diamond Deposition

Characterization of ultraintense laser produced fast electron propagation in insulatorsvs.conductors by optical emission diagnostics

2006 ◽  
Vol 133 ◽  
pp. 499-502 ◽  
Author(s):  
M. Manclossi ◽  
J. J. Santos ◽  
J. Faure ◽  
A. Guenmie-Tafo ◽  
D. Batani ◽  
...  
Keyword(s):  
Fast Electron ◽  
Optical Emission ◽  
Electron Propagation

scholarly journals Comparison of Elemental Analysis Techniques for the Characterization of Commercial Alloys

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 736
Author(s):  
Peter Seidel ◽  
Doreen Ebert ◽  
Robert Schinke ◽  
Robert Möckel ◽  
Simone Raatz ◽  
...  
Keyword(s):  
Accurate Determination ◽  
Analytical Techniques ◽  
Optical Emission ◽  
Breakdown Spectroscopy ◽  
General Evaluation ◽  
Sample Composition ◽  
Laser Induced Breakdown ◽  
Copper Aluminum

Better quality control for alloy manufacturing and sorting of post-consumer scraps relies heavily on the accurate determination of their chemical composition. In recent decades, analytical techniques, such as X-ray fluorescence spectroscopy (XRF), laser-induced breakdown spectroscopy (LIBS), and spark optical emission spectroscopy (spark-OES), found widespread use in the metal industry, though only a few studies were published about the comparison of these techniques for commercially available alloys. Hence, we conducted a study on the evaluation of four analytical techniques (energy-dispersive XRF, wavelength-dispersive XRF, LIBS, and spark-OES) for the determination of metal sample composition. It focuses on the quantitative analysis of nine commercial alloys, representing the three most important alloy classes: copper, aluminum, and steel. First, spark-OES is proven to serve as a validation technique in the use of certified alloy reference samples. Following an examination of the lateral homogeneity by XRF, the results of the techniques are compared, and reasons for deviations are discussed. Finally, a more general evaluation of each technique with its capabilities and limitations is given, taking operation-relevant parameters, such as measurement speed and calibration effort, into account. This study shall serve as a guide for the routine use of these methods in metal producing and recycling industries.

scholarly journals Merits of microwave plasmas for optical emission spectrometry – characterization of an axially viewed microwave-sustained, inductively coupled, atmospheric-pressure plasma (MICAP)

2020 ◽  
Vol 35 (10) ◽  
pp. 2369-2377
Author(s):  
Helmar Wiltsche ◽  
Matthias Wolfgang
Keyword(s):  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Optical Emission ◽  
Plasma Source ◽  
Optical Emission Spectrometry ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Microwave Plasmas ◽  
Inductively Coupled

The MICAP is a microwave driven plasma source employing nitrogen as the plasma gas. In this work we compare LODs and LOQs obtained in axial viewing with those obtained by ICP-OES and evaluate the effect of air instead of nitrogen as the plasma gas.

Effect of Annealing Conditions on the Dissolution Process of Complex Carbonitrides in a V-Nb-Ti Microalloyed Steel

2018 ◽  
Vol 941 ◽  
pp. 21-26
Author(s):  
Gloria Basanta ◽  
Ana L. Rivas ◽  
Ervis Díaz ◽  
Carlos Parra
Keyword(s):  
Inductively Coupled Plasma ◽  
Microalloyed Steel ◽  
Optical Emission ◽  
Dissolution Process ◽  
Emission Spectrometry ◽  
Inductively Coupled ◽  
Annealing Conditions ◽  
Plasma Optical Emission Spectrometry

The present work has been undertaken to assess the evolution of dissolution process of large dendritic precipitates in a V-Nb-Ti microalloyed steel. The study was performed by reheating the samples at 1250°C, simulating the industrial reheating practices at laboratory scale and in situ, following industrial profile; afterwards the samples were quenched in 10%NaCl aqueous solution. The characterization of the material was carried out by scanning electron microscopy accompanied with dispersive energy spectrometry, and chemical analysis by inductively coupled plasma optical emission spectrometry. The results showed a partial dissolution of dendritic precipitates. This process ocurred by a progressive dissolving the Nb-rich shells formed over cuboidal particles and primary arm of well-faceted dendritic precipitates, and by fragmentation and spheroidization of secondary branches. These processes gave rise to spherical Nb rich precipitates and cuboidal particles at the reheating conditions used in this study. Both type of particles contain vanadium.

scholarly journals CHEMICAL AND PHISICAL CHARACTERIZATION OF MEMORY BOARDS FROM OBSOLETE COMPUTERS THROUGH OPTICAL EMISSION SPECTROMETRY AND SCANNING ELECTRON MICROSCOPY

2019 ◽  
Vol 16 (2) ◽  
pp. 212-221
Author(s):  
Marcos Paulo Kohler Caldas ◽  
Mariana Alves de Carvalho ◽  
Viviane Tavares de Moraes ◽  
Jorge Alberto Soares Tenório ◽  
Denise Crocce Romano Espinosa
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Optical Emission ◽  
Optical Emission Spectrometry ◽  
Emission Spectrometry ◽  
Scanning Electron

Applicability of optical emission spectroscopy techniques for characterization of Ar and Ar/O2 discharges

2021 ◽  
Vol 54 (27) ◽  
pp. 275203
Author(s):  
M Nikolić ◽  
I Sepulveda ◽  
C Gonzalez ◽  
N Khogeer ◽  
M Fernandez-Monteith
Keyword(s):  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Optical Emission
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