摘要
采用压力浸渗法制备碳纤维增强AZ91D镁基复合材料,利用扫描电子显微镜、能谱分析仪、透射电子显微镜等分析测试手段对其微观组织进行研究。结果表明,基体镁合金中的Al元素在界面处发生偏聚。随着纤维石墨化程度提高,界面反应程度降低,界面反应物Al4C3的量逐渐减少。由于受到复合材料制备过程中产生的热应力以及制备压力的共同作用,致使基体镁合金发生塑性变形,在近界面区形成大量的位错。在远离界面的基体合金中存在大量块状和杆状的β-Mg17Al12析出相。
C fibre reinforced AZ91D magnesium matrix composites were fabricated by pressure infiltration method. The microstructure was investigated by SEM, EDS and TEM. Results showed that Al element within the magnesium alloy matrix was segregated on the interfaces. Interracial reactions were restrained and the interracial reactant Al4C3 reduced with C fibre graphitization degree increasing. Thermal stresses in the processing caused the plastic deformation in magnesium alloy and many dislocations were formed around the interfaces. Mass block and rod-shaped β-Mg17Al12 precipitation phases existed in the matrix alloy far away from the interfaces.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第10期1861-1864,共4页
Rare Metal Materials and Engineering
关键词
镁基复合材料
微观组织
界面反应
magnesium matrix composites
microstructure
interfacial reaction
