摘要
以ZTA(ZrO_(2)增韧Al_(2)O_(3))和TiC粉为原料,采用无压烧结制备TiC/ZTA导电陶瓷复合材料,考察TiC浆料浓度对TiC/ZTA导电陶瓷复合材料显微结构与性能的影响。实验结果表明:物相分析显示烧结后的样品由α-Al_(2)O_(3)、t-ZrO_(2)、m-ZrO_(2)和TiC组成,并未生成其他新相。TiC相分布在ZTA陶瓷颗粒的周围,且相互连接形成TiC网络。当TiC浆料浓度为15 wt.%时,TiC/ZTA导电陶瓷复合材料的综合性能最佳,其体积密度、开口气孔率、维氏硬度、抗弯强度、断裂韧性和电阻率分别为4.16 g·cm^(-3)、0.22%、16.4 GPa、383.4 MPa、6.28 MPa·m^(1/2)和1.7×10^(-2)Ω·m。
ZTA(zirconia toughened alumina)and TiC were used as raw materials to prepare TiC/ZTA conductive ceramic composites by using pressureless sintering.The effect of TiC slurry concentration on microstructure and properties of the TiC/ZTA conductive ceramic composites were studied.It is found that the pressureless-sintered sample contained α-Al_(2)O_(3),t-ZrO_(2),m-ZrO_(2) and TiC.The TiC phase was distributed around the ZTA ceramic grains,forming TiC network.When the TiC slurry concentration was 15 wt.%,the TiC/ZTA conductive ceramic composites exhibited the highest comprehensive properties,with the volume density,open porosity,Vickers hardness,flexural strength,fracture toughness and electrical resistivity being 4.16 g.cm-3,0.22%,16.4 GPa,383.4 MPa,6.28 MPa·m^(1/2) and 1.7×10^(-2)Ω·m,respectively.
作者
王亚军
张进
岳新艳
茹红强
WANG Yaju;ZHANG Jin;YUE Xinyan;RU Honggiang(Key Laboratory for Anisotropy and Texture of Materials Ministry of Education,Northeastern University,Shenyang 110819,Liaoning,China;Institute of Advanced Ceramics,School of Materials Science and Engineering,Northeastern University,Shenyang 110819,Liaoning,China)
出处
《陶瓷学报》
CAS
北大核心
2023年第6期1190-1197,共8页
Journal of Ceramics
基金
高纯超细超高温**粉体批量研制(J*T-145)。
关键词
导电陶瓷复合材料
无压烧结
显微结构
力学与电学性能
conductive ceramic composites
pressureless sintering
microstructure
mechanical and electrical properties
