New origin of spirals and new growth process of carbon whiskers

被引：20

作者：

Dong, E

Shen, WC ^{[1
]}

Zhang, BF

Liu, X

Kang, FY

Gu, JL

Li, DS

Chen, NP

机构：

[1] Tsing Hua Univ, Dept Mat Sci & Engn, Mat Res Ctr, Lab Adv Mat,Graphite Grp, Beijing 100084, Peoples R China

[2] Inst Aeronaut Mat, Beijing 100095, Peoples R China

来源：

CARBON | 2001年 / 39卷 / 15期

关键词：

vapor grown carbon; whiskers; grinding; scanning electron microscopy; transmission electron microscopy;

D O I：

10.1016/S0008-6223(01)00064-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A new kind of carbon whisker, different from others, has been found by means of high resolution electron microscopy and field emission scanning electron microscopy. Carbon layers are almost perpendicular to the whisker axis and a spiral structure is formed around it. Structure analysis indicates the growth process consists of two stages; firstly, carbon layers stacked in turbostratic manner, and then gradually graphitized. Accordingly, the final structure of whiskers is perfect graphitized texture. The spirals are not similar to the so-called 'growth spirals' formed by the screw dislocation mechanism, and a more reasonable growth mechanism of whiskers is suggested in accordance with the analysis. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：2325 / 2333

页数：9

共 11 条

[1]

Ajayan P. M., 1997, CARBON NANOTUBES PRE, P111

[2] KINETIC AND MICROSCOPIC ASPECTS OF CATALYTIC CARBON GROWTH [J].