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Влияние диаметра тигля на микроструктуру сплава Al – Si, полученного методом контролируемой диффузионной кристаллизации

Xuqiang Yang, Tijun Chen

Аннотация


Методами моделирования и экспериментально исследовано влияние диаметра тигля на микроструктуру сплава Al – 8Si (масс. %), полученного методом контролируемой диффузионной кристаллизации. Изучены процессы зародышеобразования и роста зерен в течение всей кристаллизации. Результаты моделирования показали, что уменьшение диаметра тигля улучшает эффект смешивания, что способствует формированию микроструктуры с более мелкими и более сфероидальными первичными зернами. Результаты эксперимента косвенно подтвердили результат моделирования. Детально и поэтапно описан весь процесс кристаллизации сплава, включая этапы зарождения a-Al зерен, их рост на межфазной границе твердое тело/жидкость, образование дендритной структуры и протекание эвтектической реакции.


Ключевые слова


контролируемая диффузионная кристаллизация; сплав Al – Si; параметры тигля; рост зерна

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Литература


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DOI: https://doi.org/10.30906/mitom.2025.8.41-41

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