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Title | AFM Investigation of Epoxy Fracture Surfaces Indicating Nanoplasticity |
Authors |
Haba, D.
Barbezat, M. Brunner, A.J. |
ORCID | |
Keywords |
Polymer Epoxy Fracture mechanics High resolution Atomic-force microscopy (AFM) |
Type | Conference Papers |
Date of Issue | 2015 |
URI | http://essuir.sumdu.edu.ua/handle/123456789/42653 |
Publisher | Sumy State University |
License | |
Citation | Haba, D. AFM Investigation of Epoxy Fracture Surfaces Indicating Nanoplasticity [Текст] / D. Haba, M. Barbezat, A. J. Brunner // Nanomaterials: Applications & Properties (NAP-2015) : Proceedings of the International Conference. — Sumy : Sumy State University, 2015. — V.4, No1. — 01MAN01. |
Abstract |
Epoxy fracture surfaces are investigated by nanomechanical atomic-force micrsocopy (AFM). Apparent nodules on these surfaces are likely AFM tip-convolution artifacts, which might also explain apparent modulus inhomogeneities. No modulus inhomogeneities are found on smooth ultramicrotome cuts. Invest igation
of a copolymer shows, however, that existing inhomogeneities can be measured indeed. AFM investigation results in plastic deformation of ultramicrotome cuts already at low forces of 50 nN, which results in a blunt topographic image and an apparently increased modulus. This suggests that thin, sharp surface features are present on ultramicrotome cuts which are plastically deformed upon AFM investigation. Super-sharp AFM imaging showed a presumably more representative image of the investigated fracture surfaces,
which showed numerous depressions and vertical steps a few nanometers high. This suggests that even brittle epoxy exhibits some plasticity at the nanometer scale upon fracture. |
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