Combustion features in the Mo–Si–B system. Part 1. Mechanism and kinetics

The use of in situ diagnostic methods is required to obtain data on the structure and composition of the material in real time when studying condensed substances in the course of chemical reactions and phase transformations. We present the results on the development and application of the time-resolved X-ray diffraction method for the diagnosis of fast processes in heterogeneous condensed media, including self-propagating high-temperature synthesis. An X-ray tube was used as a radiation source. The method is based on the use of high-speed registration of XRD patterns in a wide angular interval and provides obtaining in situ data on the evolution of the crystal structure of the reactants. A high-speed linear detector and reaction chambers, an effective analysis system with a time resolution in the range of 10–1 – 102 sec has been developed on the base of a powder diffractometer. A complex of object-oriented diffraction techniques has been developed to study the dynamics of phase transitions in self-propagating high-temperature synthesis of inorganic materials, combustion of energy systems and liquid solutions, crystallization of amorphous alloys, in the analysis of the phase composition of materials in the process of heat treatment. The results obtained can be used to identify the mechanism of structural and chemical transformations in condensed matter.

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<i>In situ</i> study of heterogeneous media combustion processes by time Resolved XRD

Kovalev

Ponomarev

Алымов

2022

Zavod. lab., Diagn. mater.

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Combustion features in the Mo–Si–B system. Part 1. Mechanism and kinetics

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<i>In situ</i> study of heterogeneous media combustion processes by time Resolved XRD

<i>In situ</i> study of heterogeneous media combustion processes by time Resolved XRD

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