Structures of bulk amorphous Zr_(41)Ti_(14)Ni_(10)Cu_(12.5)Be_(22.5)alloy in amorphous, crystalline, supercooled liquid and liquid states

摘要

The amorphous and crystal structures of Zr_(41)Ti_(14)Ni_(10)Cu_(12.5)Be_(22.5) alloy have been analyzed with X-ray diffractometer. The structures of bulk amorphous Zr_(41)Ti_(14)Ni_(10)Cu_(12.5)B_(22.5) alloy in solid, supercooled liquid and liquid states are almost of the same structure. The RDFs (Radius Distribution Function), the first coordination number, the first coordination radius, the correlation radius and atom number of the cluster were calculated for bulk amorphous Zr_(41)Ti_(14)Ni_(10)Cu_(12.5)B_(22.5) alloy in different states. The first coordination sphere radii and the first coordination numbers are 0.312 nm, 11.2 in solid state, 0.301 nm, 10.932 in supercooled liquid region and 0.305 nm, 11.296 in liquid state. The crystal structure of Zr_(41)Ti_(14)Ni_(10)Cu_(12.5)B_(22.5) alloy is consisted of several intermetallic compounds which are CuZr_2, Be_2Zr, etc. The reason of formation glass for this alloy is that there is a larger resistance for atoms to rearrange and form intermetallic compounds in a long range order.