Correlation between liquid structure and glass forming ability in glassy Ag-based binary alloys  

作　　者：Lü XiaoQian, BIAN XiuFang, XIANG Nan & JIA Ran Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan 250061, China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2010年第3期399-404,共6页中国科学：物理学、力学、天文学（英文版）

基　　金：support by the National Basic Research Program of China (Grant No. 2007CB613901);the National Natural Science Foundation of China (Grant Nos. 50831003 and 50871062)

摘　　要：The atomic structures of liquid Ag-based binary alloys have been investigated in the solidification process by means of X-ray diffraction. The results of liquid structure show that there is a break point in the mean nearest neighbor distance r1 and the coordination number Nmin for glass-forming liquid, while the correlation radius rc and the coordination number Nmin display a monotone variational trend above the break point. It means glass-forming liquids have a steady changing in structure above liquidus and more inhomogeneous state at liquidus. We conclude that there is a strong correlation between liquid structure and glass forming ability in Ag-based binary alloys.The atomic structures of liquid Ag-based binary alloys have been investigated in the solidification process by means of X-ray diffraction. The results of liquid structure show that there is a break point in the mean nearest neighbor distance r1 and the coordination number Nmin for glass-forming liquid, while the correlation radius rc and the coordination number Nmin display a monotone variational trend above the break point. It means glass-forming liquids have a steady changing in structure above liquidus and more inhomogeneous state at liquidus. We conclude that there is a strong correlation between liquid structure and glass forming ability in Ag-based binary alloys.

关 键 词：liquid structure glass forming ability Ag-based binary alloys 

分 类 号：TG131[一般工业技术—材料科学与工程]