TORSIONAL MODULUS OF VAPOR-GROWN CARBON-FIBERS

被引：1
|
作者：
CHEN, JH
LU, Y
CHURCH, DB
PATEL, D
机构：
[1] Physics Department, Colorado State University, Fort Collins
来源：
APPLIED PHYSICS LETTERS | 1992年 / 60卷 / 19期
关键词：
D O I：
10.1063/1.107021
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The torsional modulus (G) of vapor-deposited carbon fibers of both as-grown and annealed samples were determined with a torsion pendulum. G is found to be both stress and size dependent. The extrapolated zero-stress value of torsional modulus is 105 +/- 5 GPa for a 5.4-mu-m diameter as-grown fiber and 200 +/- 10 GPa for a 8.4-mu-m diameter annealed fiber. G decreases with increasing diameter. These unusually high values of torsional moduli, compared to other types of carbon fibers, are believed to be the results of the tree-ring structural morphology and the degree of graphitization of these vapor-deposited carbon fibers.
引用
收藏
页码：2347 / 2349
页数：3
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