Топологическая лазерная термодинамика в технологиях управления функциональными характеристиками высокоэнтропийных сплавов с поверхностными дендритными структурами

Рассматривается лазерная термодинамика топологических структур – дендритов, полученных при воздействии лазерных импульсов на поверхность ряда высокоэнтропийных сплавов в процессе лазерной абляции. Рассмотрены схемы лазерного экспериментального синтеза и его параметры для получения дендритных структур высокоэнтропийных сплавов различного характера. Для разных конфигураций таких структур в рамках нанокластерных/островковых топологических моделей проанализированы возможности управления функциональными характеристиками образцов с дендритами (электрофизика и оптика) для возможных технологических применений. Смоделированы и оценены термодинамические условия направленного синтеза дендритов при разных условиях эксперимента с лазерным воздействием от Гауссового источника излучения в рамках приближения Matlab Laser Toolbox. Проведено исследование особенностей термодинамических условий синтеза дендритных систем, образованных из высокоэнтропийных сплавов на основе аналитических оценок поля температуры. Проведенная процедура позволила оценить реальные температуры плавления для компонент наноструктурированного высокоэнтропийного сплава. Предложены модели дендритных структур в диффузионном приближении в рамках диффузионно-ограниченной агрегации, для которых приведена оценка их электропроводимости с помощью моделирования вольтамперных характеристик в рамках туннельного и прыжкового приближений, а также усиления электрического поля на неоднородных границах фрактальных структур. Разработанные модели реализованы в среде MATLAB и имеют непосредственную связь с параметрами реальной схемы синтеза. Оценки, выполненные с их помощью, не противоречат реальным величинам.  

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