Single-source-precursor synthesis and phase evolution of SiC–TaC–C ceramic nanocomposites containing core-shell structured TaC@C nanoparticles
发布时间：2021-09-03
点击次数：
影响因子：6.71
DOI码：10.1007/s40145-020-0371-z
发表刊物：Journal of Advanced Ceramics
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)measurement.After pyrolysis of the resultant single-source-precursors at 900"C,amorphous ceramic powders were obtained.The 900 C ceramics were anncaled at different temperatures in the range of 1200-1600℃ to gain SiC-TaC-C nanocomposites.The 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-SiC.It 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 C.Even at a high temperature of 1600 C,the grain sizes ofβ-SiC and TaC are smaller than 30 nm,flilling the definition of nanocomposites.The 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.
合写作者：Yujing Yang, Kangwei Mao, Yao Feng, Ralf Riedel
第一作者：Zhaoju Yu
论文类型：期刊论文
通讯作者：Qingbo Wen
学科门类：工学
一级学科：材料科学与工程
文献类型：J
卷号：9
期号：3
页面范围：320-328
是否译文：否
发表时间：2020-06-01
收录刊物：SCI