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题名: Polymer precursor synthesis of TaC-SiC ultrahigh temperature ceramic nanocomposites
作者: Lu, Yan1, 2; Chen, Fenghua1; An, Pengfei3; Ye, Li1; Qiu, Wenfeng1; Zhao, Tong1, 2
刊名: RSC ADVANCES
发表日期: 2016
卷: 6, 期:91, 页:88770-88776
收录类别: SCI
英文摘要: TaC-SiC ultrahigh temperature ceramic nanocomposites were prepared by cross-linking and subsequent pyrolysis of a novel soluble blend precursor in argon atmosphere. The precursor was synthesized by blending polycarbosilane (PCS) with polytantaloxane (PT). The geometry of metal-ligand interaction of polymer PT was determined by the X-ray absorption fine structure (XAFS). The prepared ceramic nanomaterials were investigated with respect to their chemical and phase composition, by means of FTIR, TG, X-ray diffraction (XRD), Micro-Raman spectroscopy, scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM). Annealing experiments of the TaC-SiC samples at temperatures in the range of 1000-1800 degrees C showed conversion into nanostructured ultrahigh temperature ceramic composites with a trace amount of free carbon. The average grain sizes of the precursor-derived TaC and SiC ceramics were both less than 50 nm. Ta, Si and C elements were homogeneously distributed in the sample at the submicron scale.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35331
Appears in Collections:高技术材料实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Chem, Lab Adv Polymer Mat, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China
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