Nanoscale structural and mechanical characterization of heat treated nacre

被引：44
作者：
Huang, Zaiwang [1 ]
Li, Xiaodong [1 ]
机构：
[1] Univ S Carolina, Dept Mech Engn, Columbia, SC 29208 USA
来源：
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS | 2009年 / 29卷 / 06期
关键词：
Nacre; Heat treatment; Structure; Mechanical property; Hardness; Elastic modulus; DEFORMATION;
D O I：
10.1016/j.msec.2009.02.007
中图分类号：
TB3 [工程材料学]; R318.08 [生物材料学];
学科分类号：
0805 ; 080501 ; 080502 ;
摘要：
Nanoscale structural and mechanical characterization of heat treated nacre has been carried out. Two phase transformations were identified. i.e., from aragonite to calcite in the 500 degrees C heat treated nacre and from aragonite to calcium oxide (CaO) in the 1000 degrees C heat treated nacre. The brick-mortar architecture remains in the 500 degrees C heat treated nacre, but loses in the 1000 degrees C heat treated nacre. The heat treatment burned out the biopolymer in nacre. Nanoscale holes were discovered at the aragonite platelet boundaries and on the platelet surfaces. The heat treated nacre exhibits a sharp loss in elastic modulus and hardness compared with the fresh nacre. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：1803 / 1807
页数：5
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