This article is cited in 8 papers

Phase and structural transformations and mechanism of propagation of self-propagating high-temperature synthesis in a V$_2$O$_5$ – Al mixture

N. S. Sharipova, G. I. Ksandopulo

Institute of Problems of Combustion, Almaty 480012

Abstract: Physicochemical transformations upon heating and combustion of an Al – V$_2$O$_5$ mixture are investigated. It is established that the process proceeds in a one- or two-wave regime, depending on the method of initiation. Concentration profiles of the starting and intermediate products are obtained in various zones of the wave of self-propagating high-temperature synthesis. The presence of vanadium radicals in the preflame zone is detected. It is proposed that the main feature of transformation of the mixture in the processes of a low-temperature wave is chain autocatalysis. It is established that, at initial temperatures in vacuum or upon dilution of the mixture, a low-temperature wave stabilizes near a high-temperature wave, thus entering a “satellite” regime.

UDC: 546.669

Received: 15.04.1994
Accepted: 07.04.1997

 English version: Combustion, Explosion and Shock Waves, 1997, 33:6, 659–668