Structure and property of metal melt Ⅰ:The number of residual bonds after solid-liquid phase changes  

作　　者：MI GuangBao1,2,LI PeiJie1,2 & HE LiangJu1 1 National Center of Novel Materials for International Research,Tsinghua University,Beijing 100084,China 2 Department of Mechanical Engineering,Tsinghua University,Beijing 100084,China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2010年第9期1571-1577,共7页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Basic Research Program of China (Grant No 2007CB613702);International Cooperation Program in Science and Technology (Grant No 2007DFC50090)

摘　　要：Based on the mechanism of metal solid-liquid phase change and the theory of liquid metal's micro-inhomogeneity,a physical model is established between latent heats of fusion and vaporization and the numbers of residual bonds and short-range ordered atoms at the melting point inside a metal melt.Meanwhile,the mathematical derivation and proof are also offered.This model produces the numbers of residual bonds and short-range ordered atoms after the solid-liquid phase change only by using basic parameters and thermophysical properties of the crystal structure.Therefore,it presents a more effective way to analyze the melt's structural information.By using this model,this study calculates the numbers of residual bonds and short-range ordered atoms in Al and Ni melts.The calculated results are consistent with the experimental results.Simultaneously,this study discusses the atomic number's influence on the numbers of residual bonds and short-range ordered atoms in the melts within the first(ⅠA) and second main group(ⅡA) elements.Based on the mechanism of metal solid-liquid phase change and the theory of liquid metal’s micro-inhomogeneity,a physical model is established between latent heats of fusion and vaporization and the numbers of residual bonds and short-range ordered atoms at the melting point inside a metal melt.Meanwhile,the mathematical derivation and proof are also offered.This model produces the numbers of residual bonds and short-range ordered atoms after the solid-liquid phase change only by using basic parameters and thermophysical properties of the crystal structure.Therefore,it presents a more effective way to analyze the melt’s structural information.By using this model,this study calculates the numbers of residual bonds and short-range ordered atoms in Al and Ni melts.The calculated results are consistent with the experimental results.Simultaneously,this study discusses the atomic number’s influence on the numbers of residual bonds and short-range ordered atoms in the melts within the first(ⅠA) and second main group(ⅡA) elements.

关 键 词：metal MELT atomic cluster NUMBER of RESIDUAL BONDS NUMBER of SHORT-RANGE ordered atoms PHENOMENOLOGICAL model MELT structural information 

分 类 号：O414.13[理学—理论物理]