Study of Condensed Phases, of Vaporization Temperatures of Aluminum Oxide and Aluminum, of Sublimation Temperature of Aluminum Nitride and Composition in an Air Aluminum Plasma - Archive ouverte HAL
Article Dans Une Revue Plasma Chemistry and Plasma Processing Année : 2016

Study of Condensed Phases, of Vaporization Temperatures of Aluminum Oxide and Aluminum, of Sublimation Temperature of Aluminum Nitride and Composition in an Air Aluminum Plasma

Résumé

With the Gibbs free energy method, we determine the molar fraction in a plasma at and out of thermal equilibrium consisting of air and aluminum for several percentages in the temperature range of 500–6000 K. We take three temperatures into account (Trot = Th; Tvib; Tex = Te). We indicate the formulae and the numerical method used to perform the calculation taking three condensed phases AlN, Al, Al2O3 into account. We show that the air percentage plays a major role to create these phases. We clarify the role plays on the vaporization temperatures and on the sublimation temperature by the non-thermal equilibrium of the plasma. This kind of plasma is found in arc roots, near a wall, in plasmas with a high value of electrical field,… The influence of the pressures until 30 9 105 Pa. is shown on molar fraction of the chemical species, on the vaporization temperatures and on the sublimation temperature. The vaporization temperatures are given versus the thermal non equilibrium versus various mixtures (air, aluminum) and versus the pressures (10^5 Pa–30 10^5 Pa).

Dates et versions

hal-01330879 , version 1 (13-06-2016)

Identifiants

Citer

Pascal André, M'Hammed Abbaoui, A. Augeard, Philippe Desprez, T. Singo. Study of Condensed Phases, of Vaporization Temperatures of Aluminum Oxide and Aluminum, of Sublimation Temperature of Aluminum Nitride and Composition in an Air Aluminum Plasma . Plasma Chemistry and Plasma Processing, 2016, 36 (4), pp.1161-1175. ⟨10.1007/s11090-016-9704-7⟩. ⟨hal-01330879⟩
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