Paper
The Study on Toughening Mechanism and Mechanical Properties of Stacked Microstructure of Shell
- Authors:
- Jinbo Zhang; Jin Tong; Caihua Li; Xue Di; Yunhai Ma
- Abstract
- The stacked microstructure of shell was analyzed by SEM, the results showed that the structure of shell is a kind of biological ceramic composite, which is composed of calcite, aragonite and collagen. The calcite layer has irregular laminated structure, and the aragonite layer has regular laminated structure which are composed of staight aragonite strips. The results of nanoindentation test showed that both the hardness and elastic modulus of aragonite layer are higher than those of calcite layer. It was illustrated that the carrying capacity of aragonite layer is higher than that of calcite layer under the same conditions. According to the further observation of nanoindentation apperance of shell, the crack propagation modes of two materials are different. The crack shape of calcite is irregular but the aragonite layer`s is relative straight. The aragonite layer has excellent mechanical properties.
- Keywords
- chlamys farerri shell; stacked microstructure; mechanical properties; ceramic composite
- StartPage
- 39
- EndPage
- 43
- Doi