Deagglomeration and Coagulation of Particles in Liquid Metal Under Ultrasonic Treatment
Deagglomeration and Coagulation of Particles in Liquid Metal Under Ultrasonic Treatment
复制标题
DOI：
10.24425/aoa.2019.129269
复制
发表时间：
2019-01-01
影响因子：
0.9
通讯作者：
Danilov, Pavel
中科院分区：
文献类型：
--
作者：
Kudryashova, Olga;Vorozhtsov, Alexander;Danilov, Pavel
空化模式下的超声加工用于生产基于金属基体和微米和纳米尺寸的增强颗粒的复合材料。在这种情况下，团聚体的解聚和颗粒的均匀分布是预期的效果。虽然颗粒在声场中不仅会破碎，而且会发生凝聚、粗化和沉淀。本文从理论上研究了超声波作用下液态金属中颗粒的解聚和凝聚过程。在所提出的数学模型的基础上，考虑了超声和分散介质的各种参数对声场中颗粒动力学的影响。提出了主导过程（凝聚或解聚）的判据。计算结果与科学文献中已知的实验结果进行了比较。
Ultrasonic processing in the cavitation mode is used to produce the composite materials based on the metal matrix and reinforcing particles of micro- and nano-sizes. In such a case, the deagglomeration of aggregates and the uniform distribution of particles are the expected effects. Although the particles can not only fragment in the acoustic field, they also can coagulate, coarsen and precipitate. In this paper, a theoretical study of processes of deagglomeration and coagulation of particles in the liquid metal under ultrasonic treatment is made. The influence of various parameters of ultrasound and dispersion medium on the dynamics of particles in the acoustic field is considered on the basis of the proposed mathematical model. The criterion of leading process (coagulation or deagglomeration) has been proposed. The calculated results are compared with the experimental ones known from the scientific literature.