Comparison between Cooling Rate Dependence of Macroscopic and Microscopic Quantities in Simulated Aluminium Glass  

作　　者：LIU Chang-Song ZHU Zhen-Gang 刘长松;朱震刚(Laboratory of Internal Friction and Defects in Solids,Institute of Solid State Physics,Chinese Academy of Sciences,Hefei 230031)

机构地区：[1]Laboratory of Internal Friction and Defects in Solids,Institute of Solid State Physics,Chinese Academy of Sciences,Hefei 230031

出　　处：《Chinese Physics Letters》2000年第11期821-823,共3页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No.19874067;the Foundation of the Chinese Academy of Sciences(Grant No.KJ-952-J1-412).

摘　　要：Constant-pressure molecular dynamics simulations and an analysis of the local atomic structures have been performed to study the cooling rate dependence of some macroscopic and microscopic quantities in aluminium glass.Macroscopic quantities,enthalpy and density,see an observable but small dependence on the cooling rate.Icosahedral ordering units exhibit strong cooling rate dependence,which is responsible for the dependence of the enthalpy and the density on the cooling rate;while the almost independence of some microstructural units such as the 1541,1431 and 1421 pairs of the cooling rate may lead to a small dependence of the enthalpy and the density on the cooling rate.

关 键 词：QUANTITIES INDEPENDENCE ENTHALPY 

分 类 号：G63[文化科学—教育学]