Flame propagation and combustion products in SiH4-N2O-Ar mixtures.



The laminar flame speed of SiH4-N2O-Ar and SiH4-H2-N2O-Ar mixtures were measured for the first time using the spherically expanding flame technique. A detailed reaction model has been developed and demonstrates overall quantitative agreement with the experimental data. In addition, the condensed combustion products were sampled and analyzed using transmission electron microscopy and X-ray diffraction. A mixture of amorphous silica particles and crystalline silicon nanowires were observed.

Silica particle and silicon nanowires formed in a rich SiH4-N2O-Ar flame

[1] Mével R., Chatelain K., He Y., Lapointe S., Lacoste D., Allix M., Chaumeix N., and Paillard C.-E.: Combustion of silane-nitrous oxide-argon mixtures: Analysis of laminar flame propagation and condensed products.Proceedings of the Combustion Institute: in press

[2] Mével R., Chatelain K., Lapointe S., Lacoste D., idir M., Dupre G., and Chaumeix N.: Spherically expanding flame in silane-hydrogen-nitrous oxide-argon mixtures. Combustion and Flame, 2020, vol 221, p 150-159

[3] Chatelain K., Mével R., and Lacoste D.: Correction of reaction models using collision limit violation analyses: application to a silane reaction model.Combustion and Flame, 2020, vol 217, p 346-359

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