摘要
Recently, polycrystalline materials with nanometer-size grains have aroused great interest since researchers have found that the interface component cannot be ignored in these materials, and the existence of a large number of interfaces leads to variation of many properties related to the microstructural characteristics, such as the Hall-Petch relation reported in Refs.[1, 2]. Lu et al. developed a new method for synthesizing bulk nanocrystalline alloys by using the amorphous crystallization, i. e. by
