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

• 来源期刊: 中国物理(英文版)
• 关键词: nanocrystallization Monte Carlo simulation pinning effect Ising model
• 年，卷（期）: 2005,（12）
• 页码范围: 2565-2574
• 页数: 10页
• 语种: 英文

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 ＜ TImax (where TImax is the temperature with maximum nucleation rate), the increase of temperature results in a larger growth rate and a much finer microstructure 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.