J4 ›› 2016, Vol. 13 ›› Issue (1): 124-131.doi: 10.1016/S1672-6529(14)60166-9

• 论文 • 上一篇    下一篇

Structure and Roles of the Various Layers in the Shells of Conch Conus litteratus

Xiaojuan Hong, Xiaoxiang Wang   

  1. College of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • 收稿日期:2015-06-11 修回日期:2015-12-11 出版日期:2016-01-10 发布日期:2016-01-10
  • 通讯作者: Xiaoxiang Wang E-mail:mse_wangxx@zju.edu.cn
  • 作者简介:Xiaojuan Hong, Xiaoxiang Wang

Structure and Roles of the Various Layers in the Shells of Conch Conus litteratus

Xiaojuan Hong, Xiaoxiang Wang   

  1. College of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2015-06-11 Revised:2015-12-11 Online:2016-01-10 Published:2016-01-10
  • Contact: Xiaoxiang Wang E-mail:mse_wangxx@zju.edu.cn
  • About author:Xiaojuan Hong, Xiaoxiang Wang

摘要:

Mollusc shells are renowned for their mechanical strength and toughness. To better understand the mineralization process of the shell, structure of the body whorl and base of Conus litteratus (Conus shell) were in detail investigated by using scanning electron microscopy. Three-point bending tests were taken to demonstrate that each layer of crossed-lamellar structures is indispensable to enhance the whole strength of the shells. The results show that the conch shell is composed of hierarchical structure from nano scale to macro scale, and the basic constituent is long rod-shaped aragonite. Different positions of the shell have varied structures, and the base is more complicated than the body whorl. The mechanical properties of Conus are highly anisotropic and the arrangement of middle layer has a great influence on the bending strength. The outer and inner layers are very thin but play a protective role for the middle layer.

关键词: crossed-lamellar, mechanical properties, aragonite, mollusc shell

Abstract:

Mollusc shells are renowned for their mechanical strength and toughness. To better understand the mineralization process of the shell, structure of the body whorl and base of Conus litteratus (Conus shell) were in detail investigated by using scanning electron microscopy. Three-point bending tests were taken to demonstrate that each layer of crossed-lamellar structures is indispensable to enhance the whole strength of the shells. The results show that the conch shell is composed of hierarchical structure from nano scale to macro scale, and the basic constituent is long rod-shaped aragonite. Different positions of the shell have varied structures, and the base is more complicated than the body whorl. The mechanical properties of Conus are highly anisotropic and the arrangement of middle layer has a great influence on the bending strength. The outer and inner layers are very thin but play a protective role for the middle layer.

Key words: crossed-lamellar, mechanical properties, aragonite, mollusc shell