Phase separation dynamics in binary systems containing mobile particles with variable Brownian motion

Pramana: Journal of physics

LI GUANGJIN^1¹ 

[1] School of Materials Science and Engineering, Beihang University, Beijing 100191, People’s Republic of China^1

关键词: Spinodal decomposition;    Cahn–Hilliard;    simulation;    particles;    Brownian motion;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

This study investigates the spinodal decomposition dynamics in binary mixtures containing mobile particles by combining the Cahn–Hilliard equation with Langevin dynamics for particles with Brownian motionchanges proportional to their mobility. We solve the Cahn–Hilliard equation numerically using a semi-implicit Fourier spectral method, and show that the domain growth rate first increases with the increase in particle mobility, and then decreases. The effect of filler particle concentration on the domain growth depends on its mobility: whenthe particle mobility is low, the domain growth rate decreases with the increase in particle concentration; whereas when the particle mobility is high, the domain growth rate decreases and then increases and finally decreases again with the increase in particle concentration. The proposed model suggests the possibility of controlling macroscopicbehaviour of binary alloys by altering filler particle properties.

【 授权许可】

CC BY