无机材料学报

• 研究论文 • 上一篇    下一篇

原位生成TiC/Ti5Si3纳米复合材料的显微结构研究

李建林; 江东亮; 谭寿洪   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室, 上海 200050
  • 收稿日期:1999-03-29 修回日期:1999-07-21 出版日期:2000-04-20 网络出版日期:2000-04-20

Microstructure of in Situ Produced TiC/Ti5Si3 Nanocomposite

LI Jian-Lin; JIANG Dong-Liang; TAN Shou--Hong   

  1. State Key Lab of High Perfoumance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:1999-03-29 Revised:1999-07-21 Published:2000-04-20 Online:2000-04-20

摘要: 研究了原位生成TiC/TiSi纳米复合材料的显微结构.实验结果表明,以SiC和Ti 为原料,通过反应热压工艺可以原位合成TiC/TiSi复合材料,其中的大部分TiC粒子为纳 米粒子.TiC晶粒与TiSi晶粒的晶界上存在原子台阶.复合材料还含有少量TiSiC相.这 些TiSiC相主要呈棒状分布在TiSi基体中,另有少量TiSiC相位于大的TiC晶粒内.

关键词: 原位, 碳化钛, 硅化钛, 纳米复合材料

Abstract: The microstructure of in situ produced TiC/Ti5Si3 nanocomposite was studied. The results show
that TiC/Ti5Si3 nanocomposite can be fabricated by reactively hot pressing the mixed powders of SiC and Ti. Almost TiC grains are nanosized, and
there is a small amount of Ti3SiC2 in this nanocomposite. Some elongated Ti3SiC2 grains are located in Ti5Si3 matrix and the rest
Ti3SiC_2 grains in TiC grains. There is no amorphous phase on the grain boundaries of TiC and Ti5Si3 or TiC and Ti3SiC2.
Some monatomic steps can be observed at the grain boundary of TiC and Ti5Si3.

Key words: in situ, TiC, Ti5Si3, nanocomposite

中图分类号: