纳米材料的力学性能

综述了纳米晶体材料和纳米碳管材料的力学性能研究的最新进展。实验数据表明纳米晶体材料的强度与其晶粒尺寸大小的关系并不遵循Hall-Petch方程。相对于常规晶体材料 ,纳米材料的超塑性发生在更低的温度和更高的应变速率下。理论计算和实验数据表明 :纳米碳管是一种有着高刚性、高强度、高韧性和低密度的材料。纳米晶体材料和纳米碳管的异常的力学性能已经有了一些应用实例

Mechanical properties of nanostructured materials

In this paper, the last research progress in the mechanical properties of nanocrystalline materials and carbon nanotubes is reviewed. There is evidence that the relation between the strength of nanocrystalline materials and its grain size does not follow the classic Hall-Petch plot. Low-temperature and high-strain rate superplasticities have been found in some nanocrystalline materials. The theoretical prediction and experimental data indicate that carbon nanotubes are a kind of material with high stiffness, high strength, great toughness, and low density. There are already some application examples for novel mechanical properties of nanocrystalline materials and carbon nanotubes.