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Scanning Electron Microscopic Analysis on the Deformation Mechanisms in NACRE

Published online by Cambridge University Press:  02 July 2020

R.Z. Wang ,
Z. Suo ,
A.G. Evans ,
N. Yao  and
I.A. Aksay
R.Z. Wang
Affiliation:
Department of Chemical Engineering
Z. Suo
Affiliation:
Princeton Materials Institute, Princeton University, Princeton, New Jersey, 08544
A.G. Evans
Affiliation:
Princeton Materials Institute, Princeton University, Princeton, New Jersey, 08544
N. Yao
Affiliation:
Department of Mechanical and Aerospace Engineering
I.A. Aksay
Affiliation:
Department of Chemical Engineering
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Abstract

Princeton Materials Institute, Princeton University, Princeton, New Jersey 08544 Some biological materials exhibit structural robustness, despite the brittle nature of their constituents.Nacre (mother-of-pearl), the pearly internal layer of many mollusc shells, is addressed in this study. This material comprises about 95% aragonite tablets (a mineral form of CaC03), The polygonal tablets were glued with only a few percent of biological macromolecules into layered structure. The goal of the present study is to elucidate the basic inelastic deformation mechanisms.

Typical stress /strain curves in tension and compression are plotted in Fig. 1. All tensile curves exhibited extensive inelastic deformation. After testing, the samples were initially examined using a stereo microscope (Leica MZ8) and a metallurgical microscope (Leica MEF4M) followed by analysis of the structural details using scanning electron microscopy (Philip XL-30). Optical imaging provided a visualization of the inelastic zone, manifest as white tension lines.

Type
Advanced Composites
Information
Microscopy and Microanalysis , Volume 7 , Issue S2: Proceedings: Microscopy & Microanalysis 2001, Microscopy Society of America 59th Annual Meeting, Microbeam Analysis Society 35th Annual Meeting, Long Beach, California August 5-9, 2001 , August 2001 , pp. 1118 - 1119
Copyright
Copyright © Microscopy Society of America 2001

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References

references

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