College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China.
Institute of Bio-inspired Structure and Surface Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China.
Microsc Res Tech. 2019 Jul;82(7):1083-1091. doi: 10.1002/jemt.23256. Epub 2019 Mar 20.
The morphology, composition, and mechanical properties of the dorsal bony plates in the Chinese sturgeon (Acipenser sinensis) were determined in this study. Scanning electron microscopy images of the bony plates revealed a ridge-like shape similar to that of traditional Chinese architecture and displayed hierarchical microstructures whose the degree of mineralization decreased from the surface layer to the internal layer. Moreover, the crests in the central part of the bony plates displayed porous characteristics. Composition analysis of the bony plates revealed that they were primarily composed of Ca, P, O, and C, demonstrating that hydroxyapatite was the main constituent. Mechanical experiments including nanoindentation, penetration, and tension tests confirmed that the bony plates have excellent mechanical properties and present high specific tensile strength that is comparable to that of 304 stainless steel. This study may provide a new bionic design template for lightweight and high-strength body armor.
本研究旨在确定中华鲟（Acipenser sinensis）背甲的形态、组成和力学性能。背甲的扫描电子显微镜图像显示出类似于中国传统建筑的脊状形状，并呈现出具有从表层到内层逐渐降低的矿化程度的层次微观结构。此外，背甲中心部分的脊呈现出多孔特征。背甲的成分分析表明，其主要由 Ca、P、O 和 C 组成，表明羟基磷灰石是主要成分。包括纳米压痕、穿透和拉伸测试在内的机械实验证实，背甲具有优异的力学性能，呈现出与 304 不锈钢相当的高比拉伸强度。本研究可为轻质高强防弹衣提供新的仿生设计模板。
