珍珠母的微结构与力学行为研究进展

珍珠母(nacre或mother-of-pearl)是软体动物贝壳内层的主要结构材料,具有优异的力学性能,已成为当前先进工程材料仿生设计和制备的研究热点.该生物材料具有完善的分级微结构,使其强度与韧性远高于组成这种材料的纯文石相.本文从珍珠母的微结构、实验研究以及力学模型3个方面对珍珠母的研究现状进行了概述,并指出目前研究中一些仍待解决的关键问题. 

RESEARCH ADVANCES OF THE MICROSTRUCTURE AND MECHANICAL BEHAVIOR OF NACRE

Nacre, or mother-of-pearl, a main structural material forming the inner layer of mollusc shells, displays excellent mechanical properties. It became a hot research topic recently in biomimetic design and synthesis for advanced engineering materials. The hierarchical microstructure of this biological material is so well organized that its strength and toughness are far superior to the pure ceramic that the material is made of. In this paper, we summarize relevant studies on the microstructures, mechanical properties, and mechanical modeling of nacre. Problems in the study of nacre are pointed out and discussed briefly.