College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Peoples Republic of China.
Phys Rev Lett. 2012 Sep 7;109(10):105502. doi: 10.1103/PhysRevLett.109.105502.
The issue, composition dependence of glass-forming ability (GFA) in metallic glasses (MG), has been investigated by systematic experimental measurements coupled with theoretical calculations in Cu-Zr and Ni-Nb alloy systems. It is found that the atomic-level packing efficiency strongly relates to their GFA. The best GFA is located at the largest difference in the packing efficiency of the solute-centered clusters between the glassy and crystal alloys in both MG systems. This work provides an understanding of GFA from atomic level and will shed light on the development of new MGs with larger critical sizes.
通过在铜-锆和镍-铌合金体系中进行系统的实验测量和理论计算，研究了金属玻璃（MG）的玻璃形成能力（GFA）的成分依赖性问题。研究发现，原子级堆积效率与它们的 GFA 密切相关。在这两个 MG 体系中，玻璃态和晶体合金之间溶质中心团簇的堆积效率差最大的位置具有最佳的 GFA。这项工作从原子水平上理解了 GFA，并为开发具有更大临界尺寸的新型 MG 提供了思路。
