Kinetic modelling of a N2 flowing microwave discharge with CH4 addition in the post-discharge for nitrocarburizing treatments
Identifieur interne : 001430 ( Main/Exploration ); précédent : 001429; suivant : 001431Kinetic modelling of a N2 flowing microwave discharge with CH4 addition in the post-discharge for nitrocarburizing treatments
Auteurs : C D Pintassilgo [Portugal] ; C. Jaoul [France] ; J. Loureiro [Portugal] ; T. Belmonte [France] ; T. Czerwiec [France]Source :
- Journal of Physics D: Applied Physics [ 0022-3727 ] ; 2007.
English descriptors
- Teeft :
- Active nitrogen, Active species, Afterglow, Afterglow plasma, Afterglow time, Appl, Associative ionizations, Atomic concentrations, Atomic recombination, Chain curves, Chem, Collisional, Collisional data, Collisional transfer, Combustion chemistry, Complex interplay kinetics, Compound layer, Critical density, Critical value, Data base, Different species, Discharge tube, Dominant mechanism, Early afterglow, Electron density, Electron energy distribution function, Electron impact, Experimental study, Extinction point, Fractional concentration, Full curve, Full curves, Guerra, Gure, Inner radius, Input power, Interplay kinetics, Kinetic model, Kinetic modelling, Kinetic study, Kinetics, Laboratory simulations, Large tube, Larger quartz tube, Larger tube, Late afterglow, Light emissions, Loureiro, Metastables, Methane, Methane addition, Methane decomposition, Methane percentage, Methyl radicals, Microwave, Microwave discharge, Modelling, Nitrocarburizing, Nitrocarburizing process, Nitrocarburizing treatments, Nitrogen atoms, Observation point, Optical emission spectroscopy, Other hand, Other species, Owing, Owing afterglow, Owing discharge, Owing microwave discharge, Owing microwave discharge figure, Percentage contribution, Percentage contributions, Pertinent references, Phys, Pink afterglow, Pintassilgo, Plasma nitrocarburizing, Plasma process, Positive system, Present conditions, Present value, Processes rate, Quartz tube, Quenching, Quenching reactions, Radiative, Radiative states, Recombination, Relative concentration, Relative contributions, Remote afterglow, Remote afterglow region, Ricard, Same conditions, Small percentage, Sole mechanism, Solid angle, Spectral response, Spectroscopic observations, Surf, Surface treatment, Technol, Temporal evolution, Time evolution, Titration, Total rate, Transition point, Various depopulating mechanisms, Various hydrocarbons, Various reactions, Vibrational, Wall losses.
Abstract
A kinetic study is conducted to investigate the elementary processes scheme that produces methane decomposition as a small percentage of this gas is introduced downstream in the flowing afterglow of a nitrogen microwave discharge. For this purpose a self-consistent kinetic model is used for the discharge and corresponding afterglow including, besides the species associated with active nitrogen, such as vibrationally excited molecules, and metastables and N(4S) atoms, various hydrocarbons formed from methane decomposition, and other species produced in nitrogenmethane reactions. It is observed that CH4 is primarily dissociated in CH3 and CH2 in collisions with N2(A), the stable hydrogen cyanide molecule HCN is formed at an intermediate stage of the process, HCN and CH2 give place to the formation of CN(X2), and ultimately C atoms are produced by collisions of CN(X) with N atoms. The predicted concentrations so obtained are compared with experimental determinations of N and C atoms and of N2(B3g) and CN(B2) states, these latter obtained from spectroscopic measurements.
Url:
DOI: 10.1088/0022-3727/40/12/011
Affiliations:
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Jaoul</name><affiliation wicri:level="3"><country xml:lang="fr">France</country><wicri:regionArea>Sciences des Procds Cramiques et Traitements de Surfaces, Universit de Limoges, 87068 Limoges Cedex</wicri:regionArea><placeName><region type="region" nuts="2">Nouvelle-Aquitaine</region><region type="old region" nuts="2">Limousin</region><settlement type="city">Limoges</settlement></placeName></affiliation></author><author><name sortKey="Loureiro, J" sort="Loureiro, J" uniqKey="Loureiro J" first="J" last="Loureiro">J. Loureiro</name><affiliation wicri:level="1"><country xml:lang="fr">Portugal</country><wicri:regionArea>Centro de Fsica dos Plasmas, Instituto Superior Tcnico, 1049-001 Lisboa</wicri:regionArea><wicri:noRegion>1049-001 Lisboa</wicri:noRegion></affiliation></author><author><name sortKey="Belmonte, T" sort="Belmonte, T" uniqKey="Belmonte T" first="T" last="Belmonte">T. Belmonte</name><affiliation wicri:level="1"><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire de Science et Gnie des Surfaces, Ecole des Mines, 5402 Nancy Cedex</wicri:regionArea><wicri:noRegion>5402 Nancy Cedex</wicri:noRegion><wicri:noRegion>5402 Nancy Cedex</wicri:noRegion></affiliation></author><author><name sortKey="Czerwiec, T" sort="Czerwiec, T" uniqKey="Czerwiec T" first="T" last="Czerwiec">T. Czerwiec</name><affiliation wicri:level="1"><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire de Science et Gnie des Surfaces, Ecole des Mines, 5402 Nancy Cedex</wicri:regionArea><wicri:noRegion>5402 Nancy Cedex</wicri:noRegion><wicri:noRegion>5402 Nancy Cedex</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Physics D: Applied Physics</title><title level="j" type="abbrev">J. Phys. D: Appl. Phys.</title><idno type="ISSN">0022-3727</idno><idno type="eISSN">1361-6463</idno><imprint><publisher>IOP Publishing</publisher><date type="published" when="2007">2007</date><biblScope unit="volume">40</biblScope><biblScope unit="issue">12</biblScope><biblScope unit="page" from="3620">3620</biblScope><biblScope unit="page" to="3632">3632</biblScope><biblScope unit="production">Printed in the UK</biblScope></imprint><idno type="ISSN">0022-3727</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0022-3727</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="Teeft" xml:lang="en"><term>Active nitrogen</term><term>Active species</term><term>Afterglow</term><term>Afterglow plasma</term><term>Afterglow time</term><term>Appl</term><term>Associative ionizations</term><term>Atomic concentrations</term><term>Atomic recombination</term><term>Chain curves</term><term>Chem</term><term>Collisional</term><term>Collisional data</term><term>Collisional transfer</term><term>Combustion chemistry</term><term>Complex interplay kinetics</term><term>Compound layer</term><term>Critical density</term><term>Critical value</term><term>Data base</term><term>Different species</term><term>Discharge tube</term><term>Dominant mechanism</term><term>Early afterglow</term><term>Electron density</term><term>Electron energy distribution function</term><term>Electron impact</term><term>Experimental study</term><term>Extinction point</term><term>Fractional concentration</term><term>Full curve</term><term>Full curves</term><term>Guerra</term><term>Gure</term><term>Inner radius</term><term>Input power</term><term>Interplay kinetics</term><term>Kinetic model</term><term>Kinetic modelling</term><term>Kinetic study</term><term>Kinetics</term><term>Laboratory simulations</term><term>Large tube</term><term>Larger quartz tube</term><term>Larger tube</term><term>Late afterglow</term><term>Light emissions</term><term>Loureiro</term><term>Metastables</term><term>Methane</term><term>Methane addition</term><term>Methane decomposition</term><term>Methane percentage</term><term>Methyl radicals</term><term>Microwave</term><term>Microwave discharge</term><term>Modelling</term><term>Nitrocarburizing</term><term>Nitrocarburizing process</term><term>Nitrocarburizing treatments</term><term>Nitrogen atoms</term><term>Observation point</term><term>Optical emission spectroscopy</term><term>Other hand</term><term>Other species</term><term>Owing</term><term>Owing afterglow</term><term>Owing discharge</term><term>Owing microwave discharge</term><term>Owing microwave discharge figure</term><term>Percentage contribution</term><term>Percentage contributions</term><term>Pertinent references</term><term>Phys</term><term>Pink afterglow</term><term>Pintassilgo</term><term>Plasma nitrocarburizing</term><term>Plasma process</term><term>Positive system</term><term>Present conditions</term><term>Present value</term><term>Processes rate</term><term>Quartz tube</term><term>Quenching</term><term>Quenching reactions</term><term>Radiative</term><term>Radiative states</term><term>Recombination</term><term>Relative concentration</term><term>Relative contributions</term><term>Remote afterglow</term><term>Remote afterglow region</term><term>Ricard</term><term>Same conditions</term><term>Small percentage</term><term>Sole mechanism</term><term>Solid angle</term><term>Spectral response</term><term>Spectroscopic observations</term><term>Surf</term><term>Surface treatment</term><term>Technol</term><term>Temporal evolution</term><term>Time evolution</term><term>Titration</term><term>Total rate</term><term>Transition point</term><term>Various depopulating mechanisms</term><term>Various hydrocarbons</term><term>Various reactions</term><term>Vibrational</term><term>Wall losses</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">A kinetic study is conducted to investigate the elementary processes scheme that produces methane decomposition as a small percentage of this gas is introduced downstream in the flowing afterglow of a nitrogen microwave discharge. For this purpose a self-consistent kinetic model is used for the discharge and corresponding afterglow including, besides the species associated with active nitrogen, such as vibrationally excited molecules, and metastables and N(4S) atoms, various hydrocarbons formed from methane decomposition, and other species produced in nitrogenmethane reactions. It is observed that CH4 is primarily dissociated in CH3 and CH2 in collisions with N2(A), the stable hydrogen cyanide molecule HCN is formed at an intermediate stage of the process, HCN and CH2 give place to the formation of CN(X2), and ultimately C atoms are produced by collisions of CN(X) with N atoms. The predicted concentrations so obtained are compared with experimental determinations of N and C atoms and of N2(B3g) and CN(B2) states, these latter obtained from spectroscopic measurements.</div></front></TEI><affiliations><list><country><li>France</li><li>Portugal</li></country><region><li>Limousin</li><li>Nouvelle-Aquitaine</li></region><settlement><li>Limoges</li></settlement></list><tree><country name="Portugal"><noRegion><name sortKey="Pintassilgo, C D" sort="Pintassilgo, C D" uniqKey="Pintassilgo C" first="C D" last="Pintassilgo">C D Pintassilgo</name></noRegion><name sortKey="Loureiro, J" sort="Loureiro, J" uniqKey="Loureiro J" first="J" last="Loureiro">J. Loureiro</name><name sortKey="Pintassilgo, C D" sort="Pintassilgo, C D" uniqKey="Pintassilgo C" first="C D" last="Pintassilgo">C D Pintassilgo</name></country><country name="France"><region name="Nouvelle-Aquitaine"><name sortKey="Jaoul, C" sort="Jaoul, C" uniqKey="Jaoul C" first="C" last="Jaoul">C. Jaoul</name></region><name sortKey="Belmonte, T" sort="Belmonte, T" uniqKey="Belmonte T" first="T" last="Belmonte">T. Belmonte</name><name sortKey="Czerwiec, T" sort="Czerwiec, T" uniqKey="Czerwiec T" first="T" last="Czerwiec">T. Czerwiec</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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