钛铁矿原位反应合成Al_2O_3-TiC颗粒增强铁基复合材料  

Al_2O_3-TiC Reinforced Ferro-matrix Composite by In-situ Synthesis from Ilmenite

作　　者：刘胜明[1] 汤爱涛[1] 陈敏[1] 赵子鹏[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《材料工程》2015年第1期18-23,共6页Journal of Materials Engineering

基　　金：国家高技术研究发展计划(863计划)项目(2008AA031101);重庆大学研究生创新基金(CDJXS10131161)

摘　　要：利用钛铁矿铝热碳热原位还原技术成功制备了Al2O3-TiC增强铁基复合材料。通过XRD,SEM和力学性能检测方法分析了钛铁矿原位合成和添加合成两种方式对Al2O3-TiC增强铁基复合材料的组织和力学性能的影响。结果表明:利用钛铁矿合成的铁基复合材料的增强相为Al2O3,MgAl2O4,TiC和Fe相,添加合成过程中会发生一些硬质相TiC被氧化的现象。钛铁矿原位合成Al2O3-TiC增强铁基复合材料的基体组织呈粗大的块条状分布;添加合成的复合材料的铁基体以块状均匀分布。制备的Al2O3-TiC增强铁基复合材料的性能比较优良。材料的最佳综合力学性能为抗弯强度937MPa,维氏硬度532。Al2O3-TiC particles reinforced ferro-matrix composite were successfully prepared by in-situ synthesis from ilmenite. The effects of in-situ synthesis and adding synthesis on microstructures and properties were analyzed by using XRD, SEM and mechanical testing methods. The results show that the reinforcing phases of the synthesis ferro-matrix composite comprise of Al2O3, MgAl2O4, TiC and Fe. Some of the TiC phases are oxidized during the synthesis process. The iron matrix of in situ syn- thetic composite is distributed as thick block strip and the iron matrix of adding synthetic composite is in a uniform distribution. The properties of synthetic material are excellent. The optimal flexural strength and Vickers hardness are 937MPa and 532, respectively.

关 键 词：铁基复合材料 钛铁矿 AL2O3-TIC 组织 性能 

分 类 号：TB331[一般工业技术—材料科学与工程]