Stability of Non-Adiabatic Solid-Solid Combustion

Combustion synthesis of alkaline-earth substituted lanthanum manganites; LaMnO3, La0.6Ca0.4MnO3 and La0.6Sr0.4MnO3

“…In the spinning mode, the wavefront moves along a defined path with uniform velocity, however the reaction is often surface limited and appears as a series of ''fingers'' of reaction. 28 Observation of the SHS reactions reported here by eye or by video camera are best described as examples of steady propagation as the wavefront did move with uniform velocity, in a planar fashion and without the stops and starts associated with oscillating propagation. However, detailed assessment by thermal imaging work showed that although the propagation was steady there was some structure to the synthesis wave and the exact pathway taken by the wavefront showed some slight variation between samples -accounted for by a slight inhomogeneity of the starting material.…”

Role of Stress in Reaction Engineering Catalytic and Noncatalytic Reactions

“…Based on our extensive knowledge of nonlinear dynamic phenomena in solid + solid solid noncatalytic reactions, a plethora of dynamic phenomena (oscillations, rotating fronts, fingering waves, etc.) may exist (Thiart et al, 1992;Puszynski et al, 1987). In these dynamic phenomena, very steep temperature gradients and differences occur, which may result in excessive thermoelastic stresses.…”

“…If the thermoelastic stress exceeds the maximum tensile strength of the propellant matrix, failure of the matrix occurs and cracks develop. Analysis of the solid + solidgas problem can be carried out in the spirit of our recent work (Thiart et al, 1992).…”

Modeling of Condensed Phase Combustion−Decomposition Reaction with Gas Generation

“…Analysis of solid-phase combustion has been carried out by the Merzhanov school in the last four decades. − Many other authors have made individual contributions to pulsating combustion; , stability of solid-phase combustion, modeling of solid−solid combustion, and gas−solid combustion with flow. , Theoretical investigations of solid combustion have become important because of its applications in the class of technologically important reactions referred to as self-propagating high-temperature synthesis (SHS). , …”