以 AZ91D 镁合金为基体，以不同粒径(45~128μm)的漂珠为颗粒增强相，采用搅拌铸造法制备了漂珠质量分数为0~10％的 AZ91D 镁合金基复合材料，并研究了复合材料的显微组织和力学性能.结果表明：复合材料中的漂珠分布均匀，主要由α-Mg、Mg17 Al12、Mg2 Si、MgO 等物相组成；复合材料的硬度随漂珠含量增加而增大；当漂珠的质量分数为6％、平均粒径为60μm 时，复合材料的硬度最高，为82．1 HBW；当漂珠的平均粒径为90μm、质量分数为6％时，复合材料的抗压强度最高，为348．3 MPa；复合材料的断裂方式是以解理断裂为主的脆性断裂，漂珠在复合材料断裂过程中发生破损.
Taking AZ91D magnesium alloy as matrix metal and fly ash cenosphere (FAC)with particle diameter of 45-128 μm as particle reinforcement phase,FAC/AZ91D composite containing 0 - 10wt% FAC was prepared by stirring cast method,and microstructure and mechanical properties of the composite were studied.The results show that FAC distributed uniformly in the composite,the composite contained some phases,such asα-Mg, Mg1 7 Al1 2 ,Mg2 Si and MgO.The hardness of the composite improved with the increase of the content of FAC.When mass fraction and average size of FAC was 6% and 60 μm respectively,the composite had the highest hardness of 82.1 HBW.The compressive strength of the composite up to peak value of 348.3 MPa,when average size and mass fraction of FAC was 90 μm and 6% respectively.The fracture mechanism of the composite was brittle fracture among which cleavage fracture made a major role.FAC was damaged during fracture process of the composite.
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