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Effects of nanostructures on the fracture strength of the interfaces in nacre

Published online by Cambridge University Press:  31 January 2011

F. Song  and
Y. L. Bai
F. Song
Affiliation:
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
Y. L. Bai
Affiliation:
State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
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Abstract

A strengthening mechanism arising from the mineral bridges in the organic matrix layers of nacre (mother of pearl) is presented by studying the structural and mechanical properties of the interfaces in nacre. This mechanism not only increases the average fracture strength of the organic matrix interfaces by about five times, but also effectively arrests the cracks in the organic matrix layers and causes the crack deflection in this biomaterial. The present investigation shows that the main mechanism governing the strength of the organic matrix layers of nacre relies on the mineral bridges rather than the organic matrix. This study provides a guide to the interfacial design of synthetic materials.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 18 , Issue 8 , August 2003 , pp. 1741 - 1744
Copyright
Copyright © Materials Research Society 2003

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