Nanocrystallization behaviour of a ternary amorphous alloy during isothermal annealing： a Monte Carlo simulation  

作　　者：金士锋 王伟民 周建坤 国洪轩 J. F. Webb 边秀房 

机构地区：[1]The Key Laboratory of Liquid Structure and Heredity of Materials, Shandong University, Jinan 250061, China [2]School of Mechanical Engineering, Yeungnam University, 214-1 Dae-dong, Gyeongsan, Gyeongbuk 712-749, Republic of Korea

出　　处：《Chinese Physics B》2005年第12期2565-2574,共10页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant Nos 50301008 and 50231040） and the Shandong Young Scientists Foundation.

摘　　要：The nanocrystallization behaviour of Zr70Cu20Ni10 metallic glass during isothermal annealing is studied by employing a Monte Carlo simulation incorporating with a modified Ising model and a Q-state Potts model. Based on the simulated microstructure and differential scanning calorimetry curves, we find that the low crystal-amorphous interface energy of Ni plays an important role in the nanocrystallization of primary Zr2Ni. It is found that when T〈T1max （where T1max is the temperature with maximum nucleation rate）, the increase of temperature results in a larger growth rate and a much finer mierostrueture for the primary Zr2Ni, which accords with the microstructure evolution in ＂flash annealing＂. Finally, the Zr2Ni/Zr2Cu interface energy σG contributes to the pinning effect of the primary nano-sized Zr2Ni grains in the later formed normal Zr2Cu grains.The nanocrystallization behaviour of Zr70Cu20Ni10 metallic glass during isothermal annealing is studied by employing a Monte Carlo simulation incorporating with a modified Ising model and a Q-state Potts model. Based on the simulated microstructure and differential scanning calorimetry curves, we find that the low crystal-amorphous interface energy of Ni plays an important role in the nanocrystallization of primary Zr2Ni. It is found that when T〈T1max （where T1max is the temperature with maximum nucleation rate）, the increase of temperature results in a larger growth rate and a much finer mierostrueture for the primary Zr2Ni, which accords with the microstructure evolution in ＂flash annealing＂. Finally, the Zr2Ni/Zr2Cu interface energy σG contributes to the pinning effect of the primary nano-sized Zr2Ni grains in the later formed normal Zr2Cu grains.

关 键 词：NANOCRYSTALLIZATION Monte Carlo simulation pinning effect Ising model 

分 类 号：TB383[一般工业技术—材料科学与工程]