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Scanning tunneling microscope study of polyacrylonitrile-based carbon fibers

Published online by Cambridge University Press:  31 January 2011

Dongxia Shi ,
Ning Liu ,
Haiqiang Yang ,
Juning Gao ,
Yueshan Jiang ,
Shijin Pang ,
Xubiao Wu  and
Zhen Ji
Dongxia Shi
Affiliation:
Beijing Laboratory of Vacuum Physics, Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 2724, Beijing 100080, China
Ning Liu
Affiliation:
Beijing Laboratory of Vacuum Physics, Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 2724, Beijing 100080, China
Haiqiang Yang
Affiliation:
Beijing Laboratory of Vacuum Physics, Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 2724, Beijing 100080, China
Juning Gao
Affiliation:
Beijing Laboratory of Vacuum Physics, Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 2724, Beijing 100080, China
Yueshan Jiang
Affiliation:
Beijing Laboratory of Vacuum Physics, Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 2724, Beijing 100080, China
Shijin Pang
Affiliation:
Beijing Laboratory of Vacuum Physics, Center for Condensed Matter Physics, Chinese Academy of Sciences, P.O. Box 2724, Beijing 100080, China
Xubiao Wu
Affiliation:
University of Science and Technology Beijing, Beijing 100083, China
Zhen Ji
Affiliation:
University of Science and Technology Beijing, Beijing 100083, China
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Abstract

Scanning tunneling microscopy (STM) was used to characterize the surface topography of polyacrylonitrile (PAN)-based carbon fibers before and after electrochemical treatment, stretch resistance test, and high-temperature treatment. A new kind of spiral structures was found, which was not only on the surface but also in the inner layer. The spiral structure of the fibers was caused by the spinning process. The fiber structure contained the shape of the precursor. There were some large cracks in the carbon fibers after the stretching resistance test. The large cracks can result in carbon fiber breaking under certain stress conditions. The difference in the structures of the carbon fibers before and after the high-temperature treatment was determined.

Type
Articles
Information
Journal of Materials Research , Volume 12 , Issue 10 , October 1997 , pp. 2543 - 2547
Copyright
Copyright © Materials Research Society 1997

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References

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