Disordering and the electronic transport behaviors of NbC-Al4C3-C composite

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	Disordering and the electronic transport behaviors of NbC-Al4C3-C composite
	D. Li; S. Ma; W. F. Li; B. Wu; Z. D. Zhang
	2007
发表期刊	Journal of Materials Science
ISSN	0022-2461
卷号	42 期号:16 页码:6929-6934
摘要	A composite nanomaterial composed of NbC nanocrystals, Al4C3 nanorods and carbon nanofibers as well as amorphous carbon was fabricated by arc-discharging a Nb3Al block as an anode in CH4 gas. The growth process of the NbC-Al4C3-C composite was deduced according to the microstructures of its components and the experimental conditions. NbC nanocrystals with non-stoichiometric chemical composition were in a cubic shape. As the decomposition product of the precursor of CH4 gas, carbon nanofibers were thought to be as templates, reacting with Al atoms, to form Al4C3 nanorods with a diameter of 15-40 nm. A thin layer of aluminum carbide oxide covered the surface of Al4C3 nanorods. The temperature dependence of the resistivity for the NbC-Al4C3-C composite was described by the variable-range-hopping (VRH) model between about 100 K and 300 K because of the strong localization of electrons by disorder in the carbon matrix. Below 100 K, the transport behaviors of the pellet deviated from the VRH model due to the conduction competition between the semi-conducting carbon matrix and metallic NbC nanocrystals.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;li, d (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;dali@imr.ac.cn
关键词	Carbon Nanotubes Nanoparticles Nanocapsules Templates Nanowires Nanorods
URL	查看原文
WOS记录号	WOS:000247934700064
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33624
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	D. Li,S. Ma,W. F. Li,et al. Disordering and the electronic transport behaviors of NbC-Al4C3-C composite[J]. Journal of Materials Science,2007,42(16):6929-6934.
APA	D. Li,S. Ma,W. F. Li,B. Wu,&Z. D. Zhang.(2007).Disordering and the electronic transport behaviors of NbC-Al4C3-C composite.Journal of Materials Science,42(16),6929-6934.
MLA	D. Li,et al."Disordering and the electronic transport behaviors of NbC-Al4C3-C composite".Journal of Materials Science 42.16(2007):6929-6934.