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Platelet interlocks are the key to toughness and strength in nacre

  • Kalpana S. Katti (a1), Dinesh R. Katti (a1), Shashindra M. Pradhan (a1) and Arundhati Bhosle (a1)
Abstract

Nacre, the inner layer of mollusk shells is a composite made of platelets of mineral aragonitic calcium carbonate with a few weight percent organic material sandwiched in between. The organic and nanostructural nuances are often suggested to be the reason for the extreme toughness of nacre. Here we report the presence of interlocks between platelets of nacre from red abalone. We also report and show, using three-dimensional finite element modeling, that interlocks are the key mechanism for the high toughness and strength of nacre. The observed rotation between platelet layers, which were earlier reported as defects of structure, are necessary for the formation of interlocks.

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a) Address all correspondence to this author. e-mail: Kalpana.Katti@ndsu.nodak.edu
References
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1.Watabe N.J.: Studies on shell formation. XI. Crystal-matrix relationships in the inner layers of mollusk shells. Ultrastruc. Res. 12, 351 (1965).
2.Sarikaya M., Liu J., and Aksay I.A.: Nacre: Properties, crystallography, morphology, and formation, in Biomimetics: Design and Processing of Materials, edited by Sarikaya M. and Aksay I.A. (American Institute of Physics, New York, NY, 1995), pp. 3590.
3.Currey J.D.: Mechanical properties of mother of pearl in tension. Proc. R. Soc. London, Ser. B. Biol. Sci. 196, 443 (1977).
4.Jackson A.P., Vincent J.F. and Turner R.M.: The mechanical design of nacre. Proc. R. Soc. London, Ser. B. Biol. Sci. 234, 415 (1988).
5.Schaeffer T.E., Ionescu-Zanetti C., Proksch R., Fritz M., Walters D.A., Almqvist N., Zaremba C.M., Belcher A.M., Smith B.L., Stucky G.D., Morse D.E. and Hansma P.K.: Does abalone nacre form by heteroepitaxial nucleation or by growth through mineral bridges? Chem. Mater. 9, 1731 (1997).
6.Song F., Zhang X.H. and Bai Y.L.: Microstructure and characteristics of the organic matrix layers of nacre. J. Mater. Res. 17, 1567 (2002).
7.Wang R.Z., Suo Z., Evans A.G., Yao N. and Aksay I.A.: Deformation mechanisms in nacre. J. Mater. Res. 16, 2485 (2001).
8.Katti K.S., Katti D.R., Tang J.P., Pradhan S.M., and Sarikaya M.: Modelling mechanical responses in a laminated biocomposite, Part II: Nonlinear responses and nuances of nanostructure. J. Mater. Sci. 40, 1749 (2005).
9.Katti D.R., Pradhan S.M. and Katti K.S.: Modeling the organic– inorganic interfacial nanoasperities in a model bio-nano-composite, nacre. Rev. Adv. Mater. Sci. 6, 162 (2004).
10.Park J.B. and Lakes R.S.: Structure property relationships of biological materials, in Biomaterials: An Introduction, 2nd ed. (Plenum Press, New York, 1992), pp. 185222.
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Journal of Materials Research
  • ISSN: 0884-2914
  • EISSN: 2044-5326
  • URL: /core/journals/journal-of-materials-research
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