快速凝固结合粉末冶金法制备Al_2O_3颗粒增强AZ91镁基复合材料的组织与力学性能  

Microstructure and Mechanical Properties of Al_2O_(3p)/AZ91 Mg-Based Composites Prepared by RS/PM Process

作　　者：盛绍顶[1] 严红革[2] 陈振华[2] 

机构地区：[1]安徽理工大学材料科学与工程学院,淮南232001 [2]湖南大学材料科学与工程学院,长沙410082

出　　处：《机械工程材料》2010年第10期40-42,54,共4页Materials For Mechanical Engineering

基　　金：教育部博士点基金资助项目(20070532087);教育部新世纪优秀人才计划资助项目(NCET-06-0701)

摘　　要：采用自制的双辊雾化急冷设备,用快速凝固结合粉末冶金方法制备了Al2O3颗粒增强AZ91镁基复合材料,研究了该复合材料的显微组织、相组成和力学性能。结果表明:Al2O3颗粒增强相在基体中分布均匀,复合材料的室温δ、σb、σ0.2分别为2.00%,325.00 MPa,293.64 MPa;复合材料表现出较好的高温力学性能,473 K时,其δ、σb、σ0.2分别为11.24%,209.75 MPa,195.53 MPa。AZ91 Mg-based composites reinforced by Al2O3 particles were produced by self-made twln-roller atomization chilling unit using rapid solidification （RS） and powder metallurgy （PM） method. The mierostrueture, phase composition and mechanical properties of the composites were investigated. The results show that the particle reinforced phases distributed homogeneously in the substrate. The room temperature 9, ab, a0.2 were 2. 00%, 325.00 MPa, 293. 64 MPa, respectively. The composites exhibited excellent elevated temperature mechanical properties, that the 9, σb, σ0.2 at 473 K were 11.24%, 209. 75 MPa, 195.53 MPa, respectively.

关 键 词：镁基复合材料 快速凝固 粉末冶金 颗粒增强 

分 类 号：TF123.7[冶金工程—粉末冶金] TG146.2[冶金工程—冶金物理化学]