SiC/HfyTa1-yCxN1-x/C ceramic nanocomposites with HfyTa1-yCxN1-x-carbon core-shell nanostructure and the influence of the carbon-shell thickness on electrical properties
文献类型：期刊论文
| 作者 | Wen, Qingbo2; Yu, Zhaoju1,3; Xu, Yeping4; Lu, Yan5; Fasel, Claudia2; Morita, Koji6; Guillon, Olivier7; Buntkowsky, Gerd4; Ionescu, Emanuel2; Riede, Ralf2,3 |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY C
 |
| 出版日期 | 2018-01-28 |
| 卷号 | 6期号:4页码:855-864 |
| ISSN号 | 2050-7526 |
| DOI | 10.1039/c7tc05023b |
| 英文摘要 | Dense monolithic SiC/HfyTa1-yCxN1-x/C (y = 0, 0.2 and 0.7) ceramic nanocomposites were prepared upon spark plasma sintering of amorphous SiHfTaC(N) ceramic powders which were synthesized from single-source-precursors. The microstructural evolution of the ceramic powders was investigated using elemental analysis, X-ray diffraction, Raman spectroscopy and transmission electron microscopy (TEM). The results reveal that the powdered and dense monoliths of SiC/HfyTa1-yCxN1-x/C ceramic nanocomposites annealed at T >= 1700 degrees C and at 2200 degrees C, respectively, are characterized by the presence of a homogeneous dispersion of HfyTa1-yCxN1-x-carbon core-shell nanoparticles within a beta-SiC matrix. Hf/Ta atomic ratios (or y values) of the in situ generated HfyTa1-yCxN1-x-carbon core-shell nanoparticles can be controlled precisely by molecular tailoring of the preceramic precursors, which further tunes the thickness of the in situ formed carbon shell. Interestingly, with increasing the value y the thickness of the carbon shell increases, while the electrical conductivity of the dense monolithic SiC/HfyTa1-yCxN1-x/C (y = 0, 0.2 and 0.7) nanocomposites significantly reduces. The unique HfyTa1-yCxN1-x-carbon core-shell nanostructure opens a new strategy towards tailoring the electrical conductivity of SiC/HfyTa1-yCxN1-x/C nanocomposites for potential electromagnetic applications in harsh environments. |
| 语种 | 英语 |
| 出版者 | ROYAL SOC CHEMISTRY |
| WOS记录号 | WOS:000423402500021 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/45653]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Yu, Zhaoju |
| 作者单位 | 1.Xiamen Univ, Coll Mat, Key Lab High Performance Ceram Fibers, Minist Educ, Xiamen 361005, Peoples R China 2.Tech Univ Darmstadt, Inst Mat Wissensch, Otto Berndt Str 3, D-64287 Darmstadt, Germany 3.Xiamen Univ, Coll Mat, Fujian Key Lab Adv Mat, Xiamen 361005, Peoples R China 4.Tech Univ Darmstadt, Eduard Zintl Inst Anorgan & Phys Chem, Alarich Weiss Str 4, D-64287 Darmstadt, Germany 5.Chinese Acad Sci, Lab Adv Polymer Mat, Inst Chem, Beijing 100190, Peoples R China 6.Natl Inst Mat Sci, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan 7.Forschungszentrum Julich, Inst Energie & Klimaforsch Werkstoffsynth & Herste, Wilhelm Johnen Str, D-52425 Julich, Germany |
| 推荐引用方式 GB/T 7714 | Wen, Qingbo,Yu, Zhaoju,Xu, Yeping,et al. SiC/HfyTa1-yCxN1-x/C ceramic nanocomposites with HfyTa1-yCxN1-x-carbon core-shell nanostructure and the influence of the carbon-shell thickness on electrical properties[J]. JOURNAL OF MATERIALS CHEMISTRY C,2018,6(4):855-864. |
| APA | Wen, Qingbo.,Yu, Zhaoju.,Xu, Yeping.,Lu, Yan.,Fasel, Claudia.,...&Riede, Ralf.(2018).SiC/HfyTa1-yCxN1-x/C ceramic nanocomposites with HfyTa1-yCxN1-x-carbon core-shell nanostructure and the influence of the carbon-shell thickness on electrical properties.JOURNAL OF MATERIALS CHEMISTRY C,6(4),855-864. |
| MLA | Wen, Qingbo,et al."SiC/HfyTa1-yCxN1-x/C ceramic nanocomposites with HfyTa1-yCxN1-x-carbon core-shell nanostructure and the influence of the carbon-shell thickness on electrical properties".JOURNAL OF MATERIALS CHEMISTRY C 6.4(2018):855-864. |
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来源：化学研究所
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