高级检索
无机材料学报

无机材料学报 >

2009 , Vol. 24 >Issue 6: 1168 - 1172

DOI: https://doi.org/10.3724/SP.J.1077.2009.01168

研究论文

SPS原位反应制备TiC/Ti2AlC/TixAly系复合材料的微观结构及其导电性能

  • 施 璐 ,
  • 张建峰 ,
  • 王连军 ,
  • 江 莞
展开
  • （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; 2.中国科学院 研究生院, 北京100049）

收稿日期: 2009-04-03

  修回日期: 2009-05-25

  网络出版日期: 2010-04-22

收起

SPS Fabrication, Microstructure and Electric Properties of TiC/Ti2AlC/TixAly in-situ Composites

  • SHI Lu ,
  • ZHANG Jian-Feng ,
  • WANG Lian-Jun ,
  • JIANG Wan
Expand
  • (1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China)

Received date: 2009-04-03

  Revised date: 2009-05-25

  Online published: 2010-04-22

Fold

摘要

以Al4C3、Ti和石墨混合粉体为原料, 采用放电等离子技术原位反应制备了TiC/Ti2AlC两相复合材料和TiC/Ti2AlC/TixAly三相复合材料. 利用XRD、SEM、TEM研究了复合材料的相组成和微观结构, HRTEM的观察结果显示复合材料的相界面清洁干净, 无非晶相存在. 同时研究了TiC/Ti2AlC/TixAly三相复合材料的原位反应烧结过程, 并对复合材料的导电行为进行了表征. 在室温时TiC/Ti2AlC材料的电导率大于TiC/Ti2AlC/TixAly三相复合材料,其中TiC/40vol%Ti2AlC的电导率最高达到8.83×105S/m. TiC/Ti2AlC两相复合材料和TiC/Ti2AlC/TixAly三相复合材料的电导率均随温度的升高而下降, 呈现电导的金属性特征, 同时电导率随温度变化关系符合Arrhenius理论.

关键词： TiC; Ti2AlC; SPS; 复合材料; 电导率

本文引用格式

施 璐 , 张建峰 , 王连军 , 江 莞 . SPS原位反应制备TiC/Ti2AlC/TixAly系复合材料的微观结构及其导电性能[J]. 无机材料学报, 2009 , 24(6) : 1168 -1172 . DOI: 10.3724/SP.J.1077.2009.01168

Abstract

TiC/Ti2AlC and TiC/Ti2AlC/TixAly composites were in-situ fabricated by spark plasma sintering using Ti, Al4C3 and graphite powders as starting materials. The phase constitution and microstructures of the composites were analyzed by XRD, SEM and HRTEM. No amorphous phase was detected at the grain boundaries. In-situ reaction and diffusion mechanism were also proposed. Through SEM images and EDS analysis of the starting powder mixtures sintered at intermediate temperatures, the intermediate phases and phase formation sequence in the sintering process can be obtained. The diffusion path in the reaction sintering always occurred along the grain boundaries or crack defects. The electric conductivities of TiC/Ti2AlC composites were higher than that of TiC/Ti2AlC/TixAly composites at room temperature. The electric conductivity of TiC/40vol%Ti2AlC was 8.83×105 S/m. With the temperature increasing, the electric conductivity of TiC/Ti2AlC/TixAly composites decreased. The temperature dependence of conductivity followed the Arrhenius empirical formula in the measured temperature range.

Key words： TiC; Ti2AlC; SPS; in-situ composite; electric conductivity

参考文献

［1］Zarrinfar N, Shipway P H, Kennedy A R, et al. Scripta. Mater., 2002,46(2): 121126.
［2］Jiang Q C, Zhao F, Wang H Y, et al. Mater. Lett., 2005, 59(16): 2043-2047.
［3］WardClose C M, Minor R, Doorbar P J. Intermetallics,1996, 4(3): 217-229.
［4］张永刚, 韩雅芳, 陈国良. 金属间化合物结构材料.北京:国防工业出版社, 2001.
［5］Barsoum M W, Brodkin D, El-Raghy T. Scripta. Mater., 1997, 36(5): 535-541.
［6］Barsoum M W, Ali M, El-Raghy T. Metall. Mater. Trans., 2000, 31(7): 1857-1865.
［7］Barsoum M W. Prog. Solid State Chem., 2000, 28(1-4): 201-281.
［8］Hugh O Pierson. Handbook of Refractory Carbides and Nitrides. Noyes Publications, 1996.
［9］Hu C F, He L F, Zhang J, et al. J. Eur. Ceram.Soc., 2008, 28(8): 1679-1685.
Options
文章导航

/

〈 〉