作　　者： ; ; ; ;

机构地区： 东北大学材料与治金学院材料电磁过程研究教育部重点实验室

出　　处： 《铸造》 2007年第5期467-472,共6页

摘　　要： 通过在不同的强磁场条件下进行低体积分数SiC颗粒增强铝基复合材料的熔化和凝固试验,研究了利用强磁场控制SiC颗粒在Al基体中分布的可行性,分析了强磁场强度和种类对SiC颗粒与基体间界面的影响效果。研究发现,均恒强磁场能够促进SiC增强颗粒在铝基体中均匀分布,而通过选择磁场参数可以实现利用梯度强磁场控制增强相在基体中的运动行为。对于SiC/Al复合体系,强磁场能够抑制界面反应而有助于界面复合,在Al-Si合金为基体的情况下,复合材料界面结合良好。 In order to investigate the effects of high magnetic fields on the distribution of SiC particles in AI matrix and on the interface between SiC and matrix, solidification experiments of low-fraction SiC particle reinforced aluminum matrix composites were conducted under various magnetic field conditions. The results show that reinforced particles distribute homogeneously under uniform magnetic fields due to the convection suppression effect of Lorenz force. Furthermore, the behavior of reinforced particles can be controlled by selecting magnetic parameters such as intensity and direction of gradient magnetic fields. High magnetic fields also contribute to developing interface by inhibiting interface reaction and good interface formation is obtained in the experiments when Al-Si alloy is used as matrix in the composites.

关 键 词： 复合材料 强磁场 界面 增强颗粒 材料电磁过程

领　　域： [金属学及工艺] [金属学及工艺]