A study of phase separation in ternary alloys

Bulletin of materials science

T A Abinandanan¹  Saswata Bhattacharyya¹ 

[1] Department of Metallurgy, Indian Institute of Science, Bangalore 560 012, India$$Department of Metallurgy, Indian Institute of Science, Bangalore 560 012, IndiaDepartment of Metallurgy, Indian Institute of Science, Bangalore 560 012, India$$

关键词: Ternary systems;    Cahnâ€�?�Hilliard equations;    spinodal decomposition.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

We have studied the evolution of microstructure when a disordered ternary alloy is quenched into a ternary miscibility gap. We have used computer simulations based on multicomponent Cahn�?�Hilliard (CH) equations for �?_A and �?_B, the compositions (in mole fraction) of A and B, respectively. In this work, we present our results on the effect of relative interfacial energies on the temporal evolution of morphologies during spinodal phase separation of an alloy with average composition, �?_A = 1/4, �?_B = 1/4 and �?_A = 1/2. Interfacial energies between the ‘A’ rich, ‘B’ rich and ‘C’ rich phases are varied by changing the gradient energy coefficients. The phases associated with a higher interfacial energy are found to be more rounded than those with lower energy. Further, the kinetic paths (i.e. the history of A-rich, B-rich and C-rich regions in the microstructure) are also affected significantly by the relative interfacial energies of the three phases.

【 授权许可】

Unknown