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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

TiN-Al2O3纳米复合材料的力学性能和导电性能

李景国; 高濂; 郭景坤   

  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:2001-10-15 修回日期:2001-12-06 出版日期:2002-11-20 网络出版日期:2002-11-20

Mechanical Properties and Electrical Conductivity of TiN-Al2O3 Nanocomposites

LI Jing-Guo; GAO Lian; QUO Jing-Kun   

  1. State Key Labor of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2001-10-15 Revised:2001-12-06 Published:2002-11-20 Online:2002-11-20

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摘要： 以纳米TiN和α-Al2O3粉体为原料,采用球磨混合法制备了纳米TiN-Al2O3复合粉体,通过热压烧结得到致密烧结体.研究了纳米TiN颗粒对Al2O3材料力学性能和导电性能的影响,实验结果表明:在Al2O3基体中加入15vol％TiN纳米颗粒时,Al2O3材料的弯曲强度和断裂韧性分别从370MPa和3.4MPa·m1/2提高到690MPa和5.1MPa·m1/2,随着TiN添加量的增加,复合材料的电阻率逐渐降低,在25vol％TiN时达到最低值(6.5×10-3Ω·cm).

关键词: 纳米TiN, Al2O3, 力学性能, 导电性能

Abstract: TiN-Al2O3 nanocomposite powders were prepared by ball milling with nano TiN and Al2O3 powder as starting materials. The sintered bodies were prepared by hot-pressing. The effects of TiN nanoparticles on the mechanical
properties and electrical conductivity of TiN-Al2O3 nanocomposites were studied. Experimental results show that the addition of 15vol% TiN
increases the bending strength of hot-pressed Al2O3 from 370MPa to 690MPa and the fracture toughness from 3.4MPa·m1/2 to 5.1MPa·m1/2,
respectively. The electrical resistivity of nanocomposites decreases with increasing amount of TiN and reaches a minimum (6.5×10-3Ω·cm)
for the nanocomposite with 25vol% TiN.

Key words: nano TiN, alumina, mechanical properties, electrical conductivity

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