Effect of TiC Content on Microstructure and Performance of TiC/ZrO2Conductive Ceramic Composites by Pressureless Sintering
摘 要
以ZrO2、TiC、TiO2和酚醛树脂为原料,结合碳热还原反应原位生成TiC,通过无压烧结工艺制备TiC/ZrO2导电陶瓷复合材料,研究了TiC质量分数(25%~40%)对陶瓷复合材料相对密度、微观结构、力学性能及导电性能的影响。结果表明:陶瓷复合材料由TiC相和t-ZrO2相组成;随着TiC含量的增加,ZrO2基体中的TiC颗粒逐渐相互连接而形成连续的网状结构,陶瓷复合材料的抗弯强度先增大后减小,硬度先降低后升高,相对密度、断裂韧性和电阻率不断减小;当TiC质量分数为30%时,陶瓷复合材料的综合性能最佳,其相对密度、抗弯强度、维氏硬度、断裂韧度和电阻率分别为97.42%,571 MPa,12.1 GPa,3.43 MPa·m1/2和3.10×10-5Ω·m。
Abstract
TiC/ZrO2 conductive ceramic composites were prepared by pressureless sintering with ZrO2, TiC, TiO2 and phenolic resin as raw materials and combining with in-situ synthesized TiC by carbothermal reduction reaction. The effect of TiC mass fraction (25%-40%) on the relative density, microstructure, mechanical properties and conducivity of the ceramic composites were investigated. The results show that the ceramic composites consisted of TiC and t-ZrO2 phases. With increasing TiC content, the TiC particles in ZrO2 matrix gradually connected with each other and then formed a continuous network structure, the bending strength of the ceramic composites increased first and then decreased, the hardness decreased first and then increased, and the relative density, fracture toughness and resistivity decreased constantly. When the mass fraction of TiC was 30%, the ceramic composite had the best comprehensive properties, whose relative density, bending strength, Vickers hardness, fracture toughness and resistivity were 97.42%, 571 MPa, 12.1 GPa, 3.43 MPa·m1/2 and 3.10×10-5 Ω·m, respectively.
中图分类号 TQ174 DOI 10.11973/jxgccl202211007
所属栏目 新材料 新工艺
基金项目 国家重点研发计划项目(2017YFB0310300);国家自然科学基金资助项目(51772048);辽宁省自然科学基金计划项目(2019-MS-06)
收稿日期 2021/8/15
修改稿日期 2022/9/5
网络出版日期
作者单位点击查看
备注黄云涛(1997-),男,安徽池州人,硕士研究生
引用该论文: HUANG Yuntao,ZHANG Jin,YUE Xinyan,ZHANG Cuiping,RU Hongqiang. Effect of TiC Content on Microstructure and Performance of TiC/ZrO2Conductive Ceramic Composites by Pressureless Sintering[J]. Materials for mechancial engineering, 2022, 46(11): 43~48
黄云涛,张进,岳新艳,张翠萍,茹红强. TiC含量对无压烧结TiC/ZrO2导电陶瓷复合材料微观结构和性能的影响[J]. 机械工程材料, 2022, 46(11): 43~48
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【6】SCHMITT-RADLOFF U,KERN F,GADOW R.Wire-electrical discharge machinable alumina zirconia niobium carbide composites:Influence of NbC content[J].Journal of the European Ceramic Society,2017,37(15):4861-4867.
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【25】SADEGHI N,AKBARPOUR M R,AGHAJANI H.A novel two-step mechanical milling approach and in situ reactive synthesis to fabricate TiC/Graphene layer/Cu nanocomposites and investigation of their mechanical properties[J].Materials Science and Engineering:A,2018,734:164-170.
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【27】谭威,林旭平,马景陶,等.Si3N4-MoSi2复合陶瓷导电性能研究[J].稀有金属材料与工程,2011,40(增刊1):196-198. TAN W,LIN X P,MA J T,et al.Study on the conductive property of Si3N4-MoSi2 composite ceramics[J].Rare Metal Materials and Engineering,2011,40(S1):196-198.
【28】古尚贤,郭伟明,伍尚华,等.Si3N4-TiC和Si3N4-TiN复相导电陶瓷的制备及电加工性能研究[J].人工晶体学报,2015,44(4):1095-1100. GU S X,GUO W M,WU S H,et al.Preparation and EDM performance of Si3N4-TiC and Si3N4-TiN composite conductive ceramics[J].Journal of Synthetic Crystals,2015,44(4):1095-1100.
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