ПОВЫШЕНИЕ КИНЕТИКИ ВОДОРОДОПОГЛОЩЕНИЯ СИСТЕМЫ Mg-Al ПУТЕМ КОНТРОЛИРУЕМОГО ФАЗООБРАЗОВАНИЯ Mg17Al12

В работе представлены результаты исследования системы Mg-Al, направленного на повышение кинетики водородопоглощения за счет оптимизации фазового состава и параметров синтеза. Для выбора режима синтеза выполнено трехмерное термодинамическое моделирование в Thermo-Calc, позволившее определить температурно-концентрационные области устойчивости интерметаллической фазы Mg₁₇Al₁₂ при сохранении твердого раствора Mg. На основе полученных данных проведены механосинтез порошков и их искровое плазменное спекание при 350 ℃. Рентгенофазовый анализ подтвердил соответствие экспериментального фазового состава расчетным прогнозам. Образцы с оптимальной долей Mg₁₇Al₁₂ (30 масс.%) показали двукратное увеличение скорости водородопоглощения по сравнению с чистым Mg при температуре 300 ℃ и давлении 20 бар. Полученные результаты подтверждают эффективность сочетания термодинамического моделирования и высокоинтенсивных технологий синтеза для разработки материалов твердотельного хранения водорода с улучшенными кинетическими характеристиками.

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