Analysis of the strengthening and toughening of a biomaterial interface
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Based on the transmission electron micrographs of nacre, the existence of mineral bridges in the organic matrix interface is confirmed. It is proposed that the microarchitecture of nacre should be considered as a “brick-bridge-mortar” (BBM) arrangement rather than traditional “brick and mortar” (BM) one. Experiments and analyses indicate that the mineral bridges effectively affect the strength and toughness of the interfaces in nacre. Comparison with a laminated composite with BM structure, SiC/BN, shows that the pattern of the crack extension and the toughening mechanism of the two materials are different. This reveals that the mineral bridges play a key role in the toughening mechanisms of nacre, which gives a conceptual guidance in material synthesis.
Keywords :organic matrix interface mineral bridge nacre microstructure fracture toughness
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- 1.Currey, J. D., Mechanical properties of mother of pearl in tension, Proc. R. Soc. Lond. B, 1977, 196: 443–463.Google Scholar
- 7.Vincent, J. F. V., Structural Biomaterials, New York; The Macmillan Press Ltd, 1982.Google Scholar
- 8.Song, F., Bai, Y. L., Effects of mineral bridges on the mechanical properties of nacre, Acta Mechanics Solida Sinica ( in Chinese), 2000, 21 (Special Issue): 171–176.Google Scholar
- 15.Feng, Q. L., Su, X. W., Ciu, F. Z. et a1., Crystallographic orientation domains of flat tablets in nacre, Biomimetics, 1995, 3: 159–167.Google Scholar