摘要
以粉末Ti,Si,TiC和炭黑为原料,采用反应热压烧结法制备TiC/Ti3SiC2复合材料。借助XRD和SEM研究TiC含量对TiC/Ti3SiC2复合材料相组成、显微结构及力学特性的影响。结果表明:通过热压烧结可以得到致密度较高的TiC/Ti3SiC2复合材料;引入TiC可以促进Ti3SiC2的生成,当引入TiC的质量分数达30%,TiC/Ti3SiC2复合材料的弯曲强度和断裂韧性分别为406.9 MPa,3.7 MPa.m1/2;复合材料中Ti3SiC2相以穿晶断裂为主,TiC晶粒易产生拔出。
TiC/Ti3SiC2 composites were fabricated by reactive hot pressing sintering method using the mixture powder of Ti, Si, C and TiC as raw material. The effect of TiC content on phase composition, microstructure and mechanical properties of TiC/Ti3SiC2 composites was investigated by X-ray diffraction and scanning electron microscopy. The results demonstrate that dense TiC/ Ti3SiC2 composites can be obtained by hot pressing. The addition of TiC into composites can enhance the formation of Ti3SiC2, When the additional content of TiC reaches 30% （mass fraction） , the flexural strength and fracture toughness of TiC/Ti3SiC2 composite are 406.9 MPa and 3.7 MPa·m^1/2, respectively. Ti3SiC2 phase displays intergranular fracture and TiC grain pulls out from Ti^SiC2 matrix when TiC/Ti3SiC2 composite fractures.
出处
《兵器材料科学与工程》
CSCD
北大核心
2012年第6期45-48,共4页
Ordnance Material Science and Engineering
基金
陕西省教育厅专项科研项目(01JK174)
