【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。更多还原

【Abstract】 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-situsynthetic 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 937 MPa and 532,respectively.更多还原