Vapor phase preparation of super-elastic carbon micro-coils

被引：54

作者：

Chen, X ^{[1
]}

Motojima, S

Iwanga, H

机构：

[1] Huaqiao Univ, Fac Engn, Fujian 632011, Peoples R China

[2] Gifu Univ, Fac Engn, Gifu 5011193, Japan

[3] Nagasaki Univ, Fac Engn, Nagasaki 8528131, Japan

来源：

JOURNAL OF CRYSTAL GROWTH | 2002年 / 237卷 / 1-4 III期

关键词：

growth models; growth from vapor; chemical vapor deposition processes; carbon; superelastic carbon materials;

D O I：

10.1016/S0022-0248(01)02250-3

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Carbon micro-coils with double helical/spiral forms were obtained by the Ni-catalyzed pyrolysis of acetylene at 700-850degreesC. There are two kinds of carbon coils: the carbon coils that are circular in fiber cross-section (circular coils) and flat or rectangular in fiber cross-section (flat coils). It was found that the circular coils with a large coil diameter of several dozen micrometers could be elastically extended up to 15 times the original coil length while that of the flat coils with small coil diameter of 3-6 mum was extended to only 1.5 times. The preparation conditions, morphology, growth mechanism and extension characteristics of the super-elastic coils were examined. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：1931 / 1936

页数：6

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