摘要
通过原位反应常压烧结法制备了一种新型的TiCx/Fe(Al,Ti)复合材料,并对Ti3AlC2与Fe的原位反应途径及制备工艺和性能进行了研究,结果表明,Ti3AlC2从760℃附近就开始与Fe初步发生原位反应,生成TiCx相.随着烧结温度达到1 100℃,Ti3AlC2相的衍射峰完全消失,随着温度继续升高到1 400℃的烧结温度范围内,所生成的复合材料物相均保持为TiCx和Fe(Al,Ti)固溶体不变.反应后,原料中微米尺寸的Ti3AlC2颗粒分裂成尺寸约500 nm左右的片状小颗粒,各小颗粒与Fe基体紧密连接的.而复合材料的力学性能随着Ti3AlC2的体积含量发生变化,当Ti3AlC2含量达到时20%,复合材料抗弯强度达到最大为266 MPa.
Novel TiCx/Fe（A1, Ti） composites have been produced by pressureless sintering. The reaction route between Ti3AlCx and Fe as well as the effects of different contents of Ti3AlG2 on the flexural strength of TiCx/Fe（Al, Ti） composites are studied. The results show that Ti3AlC4 can react with Fe at around 760℃, when the sintering temperature reaches 760 ℃, TiCx begin to emerge, as the temperature further increased to 1 100℃, the Ti3AlC2 phase consumed completely, and only Fe（Al, Ti） and TiCx phase are detected in the composites. The flexural strength changes with the Ti3AlC2 content. A maximum bending strength value of TiCx/Fe （Al, Ti） composites, 266 MPa, is obtained when Ti3AlC2 volume content is 20 % in the starting materials.
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2011年第6期117-120,共4页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家"863"计划项目资助(2006AA03Z527)
北京交通大学"十一五"重大基金项目资助(2006XZ003)
