Mécanismes de décomposition catalytique dans un plasma d'ammoniac basse pression. Etude cinétique en présence d'argon comme actinomètre

Gicquel, A.; Saillard, P.; Laidani, N.; Amouroux, J.

doi:10.1051/rphysap:01989002403028500

Cited by 7 publications

(1 citation statement)

References 12 publications

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“…A previous work on the correlation between those measurements has demonstrated that, for a pressure varying up to 20 mbars, the chemical reactivity is controlled by electron energy and/or density, residence time and vibrational excitation of the reagent (endothermic limiting step) (ref. 29). For a 20 ms residence time, NH3 decomposition increases from 22 to 75 % for an increase of 3150 to 4000 K in the N2(C311u) vibrational temperature, obtained assuming a Bolztmann distribution.…”

Section: Chemical Reactivity and Recombination Processesmentioning

confidence: 89%

Plasma and nitrides: application to the nitriding of titanium

Gicquel¹,

Laidani²,

Saillard³

1990

Pure and Applied Chemistry

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-Plasmas technologies are known to be very efficient for surface treatments, and this is the case for the production of titanium nitride. We demonstrate an increase of the kinetics due to the plasma in a diffusion reactor. Different growth laws have been obtained, they depend on the substrate surface state, on the temperature and on the active species flux. The competition between nitrogen atoms recombination and diffusion processes is also discussed.

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Section: Chemical Reactivity and Recombination Processesmentioning

confidence: 89%

Plasma and nitrides: application to the nitriding of titanium

Gicquel¹,

Laidani²,

Saillard³

1990

Pure and Applied Chemistry

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Role of oxygen contamination on titanium nitriding

Saillard¹,

Gicquel²,

Amouroux³

et al. 1990

Surface & Interface Analysis

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Parametric study of the decomposition of NH3 for an induction plasma reactor design

Soucy

Jurewicz

Boulos

1995

Plasma Chem Plasma Process

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The present paper reports a study of the gas mixing and chemical transformation in an induction plasma reactor under atmospheric pressure, and its dependence on the plasma operating conditions. For this purpose, the thermal dissociation of ammonia into nitrogen and hydrogen was chosen because of the relative simplicity of the reactions involved and its use in a number of studies on plasma synthesis of ultrafine nitride ceramic powders using ammonia as nitriding agent. A hot-wall reactor configuration is investigated in which ammonia is injected radially through multiple orifices into the gases at the exit nozzle of an induction plasma torch. Concentration mapping in the mixing zone was carried out, using a VG-Micromass-PC 300 D quadrupole mass spectrometer, for different plasma power levels, in the range 13-24 k W. A 3-point injection mode is used with the injection ports oriented

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Mécanismes de décomposition catalytique dans un plasma d'ammoniac basse pression. Etude cinétique en présence d'argon comme actinomètre

Cited by 7 publications

References 12 publications

Plasma and nitrides: application to the nitriding of titanium

Plasma and nitrides: application to the nitriding of titanium

Role of oxygen contamination on titanium nitriding

Parametric study of the decomposition of NH3 for an induction plasma reactor design

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