Исследование in situ процессов горения гетерогенных сред методом динамической рентгенографии

При исследованиях конденсированных веществ в процессе химических реакций и фазовых превращений необходимы in situ методы диагностики, позволяющие получать данные о структуре и составе материала в режиме реального времени. В работе представлены результаты диагностики быстропротекающих процессов в гетерогенных конденсированных средах, в том числе самораспространяющегося высокотемпературного синтеза, методом динамической рентгенографии. Метод основан на применении скоростной регистрации дифракционных спектров в широком угловом интервале и дает возможность получать in situ информацию об эволюции кристаллической структуры реагирующих веществ. В качестве источника излучения использовали рентгеновскую трубку. На базе порошкового дифрактометра, быстродействующего линейного детектора и реакционных камер разработана эффективная система анализа с разрешением по времени в диапазоне 10^–1 – 10² с. Создан комплекс объектно-ориентированных дифракционных методик для исследования динамики фазовых переходов при самораспространяющемся высокотемпературном синтезе неорганических материалов, горении энергетических систем и жидких растворов, кристаллизации аморфных сплавов, при анализе фазового состава материалов в процессе термической обработки. Полученные результаты могут быть использованы для выявления механизма структурно-химических превращений в конденсированных средах.

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