论文部分内容阅读
The heredity of clusters in rapidly cooled (Zrs0Cu50)100-xAlx melts and its correlation with glass-forming ability(GFA) are studied via molecular dynamics simulations.Pair distribution function and the largest standard cluster (LSC)are adopted to characterize the local atomic structures in the (Zr50Cu50)100 xAlx systems.The[12/555]icosahedra and their medium-range order (IMRO) play an important role in forming (Zr50Cu50)100-xAlx metallic glasses (MGs).The fraction of[12/555],the number of IMRO,and the maximum size of IMRO in MGs increase significantly with increasing x.A tracking study further reveals that the configuration heredity of icosahedral clusters starts from supercooled liquids.No direct correlation exists between the GFA and the onset temperature of continuous or stated heredity.Instead,a larger hereditary supercooled degree of icosahedra matches with better GFA of Al-doped Zr50Cu50 alloys.