二十面体对称
逆向蒙特卡罗
准晶
沃罗诺图
结晶学
材料科学
多面体
衍射
非晶态金属
结晶
协调数
相(物质)
金属
星团(航天器)
扩展X射线吸收精细结构
晶体结构
蒙特卡罗方法
分子物理学
化学
吸收光谱法
合金
几何学
热力学
冶金
物理
中子衍射
光学
离子
程序设计语言
数学
有机化学
统计
计算机科学
作者
Liang Yang,Sheng Yin,X. D. Wang,Q.P. Cao,J.Z. Jiang,K. Saksl,H. Franz
摘要
Atomic structure of Zr70Ni30 metallic glass (MG) was investigated by reverse Monte Carlo simulation combining with x-ray diffraction and Ni and Zr K-edge extended x-ray absorption of fine structure measurements. Distributions of coordination number (CN) and Voronoi clusters were analyzed by Voronoi tessellation method. The average CN of atoms was obtained to be 11.4 together with the average CN of Zr and Ni atoms of about 11.8 and 10.6, respectively. It is found that Z11 Kasper polyhedron and distorted icosahedra are mainly favored structural units in Zr70Ni30 MG. The discrepancy in atomic structure between Zr70Ni30 MG and its corresponding crystalline (or quasicrystalline) phases can explain the fact that Zr70Ni30 MG does not transform to neither icosahedral nor fcc Zr2Ni phase during crystallization process.
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