Single-source-precursor synthesis and phase evolution of SiC-TaC-C ceramic nanocomposites containing core-shell structured TaC@C nanoparticles

作     者：Zhaoju YU Yujing YANG Kangwei MAO Yao FENG Qingbo WEN Ralf RIEDEL Zhaoju YU;Yujing YANG;Kangwei MAO;Yao FENG;Qingbo WEN;Ralf RIEDEL

作者机构：College of MaterialsKey Laboratory of High Performnance Ceramic Fibers(Xiamen University)Ministry of EducationXiamen 361005China College of MaterialsFujian Key Laboratory of Advarced MaterialsXiamen UniversityXiamen 361005China Technische Universitit DarmstadInstitut fir MaterialwissenschafDarmstadt 64287Germany 

出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)

年 卷 期：2020年第9卷第3期

页      面：320-328页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 0817[工学-化学工程与技术] 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：Zhaoju Yu thanks the National Natural Science Foundation of China(No.51872246)for financial support 

主　　题：polymer-derived ceramies TaC SiC nanocomposites core-shell structure 

摘      要：A novel single-source-precursor for SiC-TaC-C nanocomposites was successfully synthesized by the chemical reaction between a polycarbosilane(allylhydridopolycarbosilane,AHPCS)and tantalum(V)chloride(TaCls),which was confirmed by Fourier transform infrared spectra(FTIR)*** pyrolysis of the resultant single-source-precursors at 900C,amorphous ceramic powders were *** 900 C ceramics were anncaled at different temperatures in the range of 1200-1600℃ to gain SiC-TaC-C *** phase evolution of ceramic nanocomposites was investigated by X-ray diffraction(XRD)and transmission electron microscopy(TEM).The results indicate that the TaC starts to crystallize at lower temperature than theβ-*** is particularly worth pointing out that the unique core-shell structured TaC-C nanoparticles were in-situ formed and homogeneously distributed in the ceramic matrix after annealing at 1400 *** at a high temperature of 1600 C,the grain sizes ofβ-SiC and TaC are smaller than 30 nm,flilling the definition of *** present study related to SiC-TaC C nanocomposites paves a new road for enriching ultra-high temperature ceramic family suitable for structural/functional applications in harsh environment.