Al<sub>2</sub>O<sub>3</sub>颗粒增强纯铝基复合材料的研究

Al₂O₃颗粒增强纯铝基复合材料的研究

摘要: 本文探讨了用粉末冶金法,采用常规的冶金加工设备和工艺,制造Al₂O₃颗粒增强纯铝基复合材料的可行性。研究了不同Al₂O₃体积含量复合材料的显微组织及力学性能。初步试验了二次热挤压变形对颗粒分布和对基体强化的影响。结果表明,Al₂O₃颗粒与纯铝粉混合,加压烧结制备的复合材料,组织致密,颗粒分布均匀,随Al₂O₃含量增加,复合材料强度、硬度及弹性模量大大提高,Al₂O₃含量小于10%时,塑性不降低。二次热挤压有助于提高颗粒分布的均匀性;并使基体显著强化。

Abstract: The feasibility of fabrieating the Al₂O₃ particulate reinforced aluminium matrix composites via powder metallurgy using conventional equipments and technology has been reported in the present microstructure and mechanical propertie,of the composites paper. The containing various amount of Al₂O₃ Particles,as well as the influence of the second hot-extrusion on the particulate distribxtion and the strengthening effct to the matrix have also been studied.