TiC浆料浓度对无压烧结TiC/ZTA导电陶瓷复合材料显微结构与性能的影响  

Effect of TiC Slurry Concentration on Microstructure and Properties of TiC/ZTA Conductive Ceramic Composites through Pressureless Sintering

作　　者：王亚军 张进 岳新艳[1,2] 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)

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,辽宁沈阳110819 [2]东北大学材料科学与工程学院,先进陶瓷材料研究中心,辽宁沈阳110819

出　　处：《陶瓷学报》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)。

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.

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 

分 类 号：TQ174.75[化学工程—陶瓷工业]