Ta_(4)HfC_(5)-Si_(2)BC_(3)N复相陶瓷的界面结构和晶粒生长行为

作     者：关景怡 李达鑫 周国相 段文久 杨治华 贾德昌 Ralf Riedel 秦少华 周玉 Jingyi Guan;Daxin Li;Guoxiang Zhou;Wenjiu Duan;Zhihua Yang;Dechang Jia;Ralf Riedel;Shaohua Qin;Yu Zhou

作者机构：Institute for Advanced CeramicsSchool of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150000China Key Laboratory of Advanced Structural-Functional Integration Materials&Green Manufacturing TechnologyHarbin Institute of TechnologyHarbin 150001China Chongqing Research Institute of HITChongqing 401135China Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Institut für MaterialwissenschaftTechnische Universität DarmstadtDarmstadt D-64287Germany School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2023年第66卷第11期

页      面：4306-4316页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：financially supported by the National Natural Science Foundation of China(52002092,52172068,52232004) Heilongjiang Natural Science Fund for Young Scholars(YQ2021E017) Heilongjiang Touyan Team Program and Advanced Talents Scientific Research Foundation of Shenzhen the financial support provided by the Research Training Group GRK 2561“Mat ComCom Mat:Materials Compounds from Composite Materials for Applications in Extreme Conditions”funded by the Deutsche Forschungsgemeinschaft(DFG),Bonn,Germany 

主　　题：Ta_(4)HfC_(5)-Si_(2)BC_(3)N ceramic interface behavior growth kinetics mechanical properties 

摘      要：超高温陶瓷(UHTC)Ta_(4)HfC_(5)因其优异的热物理和热机械性能而成为适用于高超音速飞行器最有前途的候选材料之一.然而,较差的烧结能力限制了其潜在的使用.为了克服该障碍,采用Si_(2)BC_(3)N陶瓷对钽-铪碳化物固溶体进行了致密化处理.通过热压烧结合成了致密的Ta_(4)HfC_(5)-Si_(2)BC_(3)N陶瓷,所得复相陶瓷由Ta_(4)HfC_(5),SiC和BN(C)相组成.在2100℃下,随着晶粒的快速生长,陶瓷内形成了“蝌蚪状的SiC和BN(C)连接相,断裂韧性提高到3.47±0.12 MPa m^(1/2).随着烧结温度的升高,Ta_(4)HfC_(5)晶粒的生长活化能从112.4 kJ mol^(−1)增加到250.7±29.3 kJ mol^(−1).