Science in China Series A: Mathematics

, Volume 44, Issue 12, pp 1596-1601

First online:

Analysis of the strengthening and toughening of a biomaterial interface

  • Fan SongAffiliated withLNM, Institute of Mechanics, Chinese Academy of Sciences Email author 
  • , Yilong BaiAffiliated withLNM, Institute of Mechanics, Chinese Academy of Sciences

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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