Ti(C,N)含量对无压烧结Ti(C,N)/ZrO_(2)陶瓷复合材料微观结构和性能的影响  

Effect of Ti(C,N)Content on Microstructure and Properties of Pressureless Sintered Ti(C,N)/ZrO_(2)Ceramic Composites

作　　者：郭广晗 刘佳琦 黄云涛 岳新艳 张翠萍 茹红强 GUO Guanghan;LIU Jiaqi;HUANG Yuntao;YUE Xinyan;ZHANG Cuiping;RU Hongqiang(Key Laboratory for Anisotropy and Texture of Materials,Ministry of Education,School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学材料科学与工程学院,材料各向异性与织构教育部重点实验室,沈阳110819

出　　处：《机械工程材料》2022年第11期49-54,共6页Materials For Mechanical Engineering

基　　金：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-126)。

摘　　要：以Y2O3稳定纳米ZrO_(2)粉、TiO_(2)粉、TiN粉、炭黑和水溶性酚醛树脂为原料,采用无压烧结方法制备Ti(C,N)/ZrO_(2)陶瓷复合材料,研究了Ti(C,N)质量分数(25%~40%)对其微观结构和性能的影响。结果表明:Ti(C,N)/ZrO_(2)陶瓷复合材料由t-ZrO_(2)和Ti(C,N)两相组成;随着Ti(C,N)含量的增加,Ti(C,N)颗粒逐渐出现团聚现象,但当Ti(C,N)质量分数增加至40%时,Ti(C,N)相分布又变得较均匀;随着Ti(C,N)含量的增加,陶瓷复合材料的开口气孔率先增大后减小,硬度、抗弯强度和断裂韧度先降低后升高;当Ti(C,N)质量分数为40%时,陶瓷复合材料的综合性能最好,其开口气孔率、硬度、抗弯强度、断裂韧度分别为0.73%,14.4 GPa,354 MPa,5.8 MPa·m^(1/2)。Ti(C,N)/ZrO_(2)ceramic composites were prepared by pressureless sintering with Y2O3stabilized nano ZrO_(2)powder,TiO_(2)powder,TiN powder,carbon black and water-soluble phenolic resin as raw materials.The effects of Ti(C,N)mass fraction(25%-40%)on the microstructure and properties were studied.The results show that the Ti(C,N)/ZrO_(2)ceramic composites consisted of t-ZrO_(2)and Ti(C,N)phases.The Ti(C,N)particles agglomerated gradually with increasing Ti(C,N)content,while distributed relatively evenly when the Ti(C,N)mass fraction increased to 40%.With increasing Ti(C,N)phase content,the open porosity of the ceramic composites increased first and then decreased,and the hardness,flexural strength and fracture toughness decreased first and then increased.When the mass fraction of Ti(C,N)was 40%,the ceramic composites had the best comprehensive performance with the open porosity of 0.73%,the hardness of 14.4 GPa,the flexural strength of 354 MPa and the fracture toughness of 5.8 MPa·m^(1/2).

关 键 词：Ti(C N)/ZrO_(2)陶瓷复合材料 无压烧结 物相组成 微观结构 力学性能 

分 类 号：TQ174[化学工程—陶瓷工业]