期刊
RSC ADVANCES
卷 6, 期 17, 页码 14112-14119出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra23318f
关键词
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资金
- National Natural Science Foundation of China [51502323, 51172256]
- Shanghai Key Project of Basic Research [14JC1406200]
- Shanghai Scientific Research Project [13521101203]
BNNTs grown in situ on the surface of silicon carbide fibers via a simplified ball milling, impregnation and annealing method using boron powder as the raw material were synthesized. The morphology, microstructure and chemical composition of as-grown BNNTs were well characterized by field-emission scanning electron microscopy, field emission transmission electron microscopy, electron energy loss spectroscopy and Raman spectroscopy. The analysis results indicate that the nanostructures are BNNTs with the diameter of 50-130 nm, exhibiting a multi-walled and bamboo-like structure and possessing two distinct morphologies of the tube walls: flat walls and bubble-chain walls, respectively. Based on the experimental characterization of BNNTs and as-milled powders, the possible growth process of BNNTs has been described and the formation mechanisms of two types of bamboo-like BNNTs have been proposed, including the tip growth mode and the base growth mode.
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