离心铸造梯度镁复合材料中颗粒分离的理论研究

Theoretical Analysis of Particle Segregation in Centrifugally Cast Functionally Graded Magnesium Composites

使用理论和实验研究探究主要参数对离心铸造镁基复合材料中颗粒分布的影响。旨在描绘凝固对颗粒运动的影响,以及其他主要力量。研究结果表明,旋转速度、凝固间隔和基体与颗粒之间的密度差异会影响由离心力引起的颗粒分离区域的厚度。此外,对AZ91基体复合材料中Si C颗粒分布的理论模型和实验的比较表明,在中部区域10%(重量百分比)的分布分析是可接受的。对于每个5%、10%和15%(重量百分比)复合材料,实验和理论结果之间的差异分别为外部区域的5.83%、10.20%和4.86%,中部区域的2.64%、1.58%和2.36%。

The paper investigates the effect of main parameters on particle distribution in centrifugally cast magnesium matrix composites using theoretical and experimental studies.The study aims to depict solidification impacts on particle movement,along with other main forces.The findings demonstrate that the rotation speed,solidification interval,and density differential between the matrix and particles affect the thickness of the particle-segregated zone caused centrifugal force.Additionally,the comparison of SiCp distribution in the AZ91 matrix composite between the theoretical model and experiments shows that the proposed analysis is acceptable at 10%(in weight)at the middle zone.The difference between the experimental and theoretical results is 5.83%,10.20%,and 4.86%in the outer region and 2.64%,1.58%,and 2.36%in the middle region for each of 5%,10%,and 15%(in weight)composites,respectively.