corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 95 » Issue 22
< Previous Article | Next Article >

Phys. Rev. Lett. 95, 225501 (2005) [4 pages]

Direct Observation of Nanocrystallite Buckling in Carbon Fibers under Bending Load

Download: PDF (253 kB) Buy this article Export: BibTeX or EndNote (RIS)

D. Loidl1, O. Paris2, M. Burghammer3, C. Riekel3, and H. Peterlik1,*
1Institute of Materials Physics, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria
2Department of Biomaterials, Max-Planck-Institute of Colloids and Interfaces, 14424 Potsdam, Germany
3European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, B.P. 220, F-38043 Grenoble Cedex 9, France

Received 5 April 2005; published 21 November 2005

Single carbon fibers are deformed in bending by forming loops with varying radius. Position-resolved x-ray diffraction patterns from the bent fibers are collected from the tension to the compression region with a synchrotron radiation nanobeam of 100 nm size from a waveguide structure. A strain redistribution with a shift of the neutral axis is observed. A significant increase of the misorientation of the graphene sheets in the compression region shows that intense buckling of the nanosized carbon crystallites is the physical origin of different tensile and compressive properties.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.225501
DOI:
10.1103/PhysRevLett.95.225501
PACS:
61.66.Bi, 61.10.Eq, 62.20.Dc, 62.25.+g

*Electronic address: herwig.peterlik@univie.ac.at

 
< Previous Article | Next Article >