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Combustion, Explosion and Shock Waves

2002 year, number 1

Nonthermal Nature of Unsteady Combustion of Chromium in Nitrogen

B. Sh. Braverman, M. Kh. Ziatdinov, Yu. M. Maksimov
Department of Structural Macrokinetics, Tomsk Science Center,
Russian Academy of Sciences, Tomsk 634021;
maks@fisman.tomsk.su.

Abstract

When specimens pressed from a chromium powder react with nitrogen at pressures of 1<!ndash!>8 MPa and relative densities of 0.47<!ndash!>0.55, unsteady combustion of a nonthermal nature, which was not known previously, is observed. It is shown that the unsteadiness is due to cracks formed ahead of the combustion front. The specimens fail as a result of an increase in the condensed-phase volume upon formation of nitrides. P. 37-40