Growth mechanism of carbon microcoils with changing fiber cross-section shape

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	Growth mechanism of carbon microcoils with changing fiber cross-section shape
	J. B. Cheng; J. H. Du; S. Bai
	2009
发表期刊	New Carbon Materials
ISSN	1007-8827
卷号	24 期号:4 页码:354-358
摘要	Carbon microcoils (CMCs) with a fiber cross-section changing from flat to circular along with a coil diameter changing from 4.2 to 6.0 mu m, which may develop a novel spring for micromechanical systems, were obtained by controlling the acetylene flow rate using Ni catalyst at a temperature of 1 013-1 053 K. A growth model for these changes was proposed in which catalytic anisotropy is considered to be the possible factor changing the fiber cross-section shape of the CMCs. Owing to the change of catalytic anisotropy caused by reaction conditions, the same slender catalyst can produce both flat CMCs and circular CMCs depending on its relative orientation to the fiber axis. A cubic Ni catalyst can only produce a circular CMC, and can only change the coil diameter upon changing the reaction conditions. The model will give more insight into the formation of CMCs and provide information on the controlled synthesis of CMCs and carbon fibers.
部门归属	[cheng jing-bao; du jin-hong; bai shuo] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;bai, s (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;jbcheng@imr.ac.cn sbai@imr.ac.cn
关键词	Carbon Microcoils Growth Model Ni Catalyst Catalytic Anisotropy Chemical-vapor-deposition Extension Characteristics Catalytic Pyrolysis Acetylene Coils Morphology Substrate
URL	查看原文
WOS记录号	WOS:000273375800010
引用统计	被引频次：8[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/321006/31847
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. B. Cheng,J. H. Du,S. Bai. Growth mechanism of carbon microcoils with changing fiber cross-section shape[J]. New Carbon Materials,2009,24(4):354-358.
APA	J. B. Cheng,J. H. Du,&S. Bai.(2009).Growth mechanism of carbon microcoils with changing fiber cross-section shape.New Carbon Materials,24(4),354-358.
MLA	J. B. Cheng,et al."Growth mechanism of carbon microcoils with changing fiber cross-section shape".New Carbon Materials 24.4(2009):354-358.