Infrared Spectra of Nitrogen, Argon, and Helium Plasmajets*

Tourin, Richard H.; Henry, Paul M.; Liang, Eliot T.

doi:10.1364/josa.51.000800

Cited by 5 publications

(2 citation statements)

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“…The more intriguing is an observation of low temperature values when using narrow band filter CWL 3.99 µm (Fig. 6b), but this could be explained 10.21611/qirt.2018.001 by the shielding gas (argon) infrared spectra transmission presented in [14]. Nevertheless, it should be emphasized that shielding gas transmission becomes a key issue in case of temperature measurement in IR spectrum.…”

Section: Fig 4 Image Of Laser Beam Scattering On Powder Particles Omentioning

confidence: 96%

Thermal imaging of laser powder interaction zone in Ultra-High Speed Laser Cladding process

Koruba¹,

Reiner²

2018

Proceedings of the 2018 International Conference on Quantitative InfraRed Thermography

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Laser cladding process is a coating deposition technology, where the layer of additional material is cladded due to interaction of powder particles with laser heat source and melt pool. The monitoring of interaction between laser beam and powder became more vital in specific Ultra-High Speed Laser Cladding process, since the cladding speed requires particles to be melted before reaching the substrate. Therefore, this paper presents the preliminary study of lateral measurement of powder concentration under the cladding nozzle and its temperature distribution during the process. Moreover, the evaluation of used spectral bands for observation of laser-powder interaction was carried out.

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Section: Fig 4 Image Of Laser Beam Scattering On Powder Particles Omentioning

confidence: 96%

Thermal imaging of laser powder interaction zone in Ultra-High Speed Laser Cladding process

Koruba¹,

Reiner²

2018

Proceedings of the 2018 International Conference on Quantitative InfraRed Thermography

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“…Also, the concentration of H 2 O vapor in the atmosphere is a function of local relative humidity. However, other gases, such as N 2 , O 2 and Ar do not absorb in the IR range, therefore having these gases in the measurement path would make the temperature measurements more reliable [64,65].…”

Section: Applicability Of Irt To Gas Microflows and Current Limitationsmentioning

confidence: 99%

Review of Optical Thermometry Techniques for Flows at the Microscale towards Their Applicability to Gas Microflows

et al. 2022

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Thermometry techniques have been widely developed during the last decades to analyze thermal properties of various fluid flows. Following the increasing interest for microfluidic applications, most of these techniques have been adapted to the microscale and some new experimental approaches have emerged. In the last years, the need for a detailed experimental analysis of gaseous microflows has drastically grown due to a variety of exciting new applications. Unfortunately, thermometry is not yet well developed for analyzing gas flows at the microscale. Thus, the present review aims at analyzing the main currently available thermometry techniques adapted to microflows. Following a rapid presentation and classification of these techniques, the review is focused on optical techniques, which are the most suited for application at microscale. Their presentation is followed by a discussion about their applicability to gas microflows, especially in confined conditions, and the current challenges to be overcome are presented. A special place is dedicated to Raman and molecular tagging thermometry techniques due to their high potential and low intrusiveness.

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Emissivity of CO2-H2O mixtures at temperatures up to 1000� K

Kuznetsova¹,

Podkladenko²

1967

J Appl Spectrosc

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Infrared Spectra of Nitrogen, Argon, and Helium Plasmajets*

Cited by 5 publications

References 1 publication

Thermal imaging of laser powder interaction zone in Ultra-High Speed Laser Cladding process

Thermal imaging of laser powder interaction zone in Ultra-High Speed Laser Cladding process

Review of Optical Thermometry Techniques for Flows at the Microscale towards Their Applicability to Gas Microflows

Emissivity of CO2-H2O mixtures at temperatures up to 1000� K

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