Predicting Composition Dependence of Glass Forming Ability in Ternary Al-Cu-Y System by Thermodynamic Calculation

Metals

Qi Wang²  Jiahao Li²  Jianbo Liu²  Baixin Liu¹ 

[1] Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;

关键词: bulk metallic glasses;    Al-Cu-Y system;    glass formation ability;    thermodynamic calculation;   

DOI  :  10.3390/met4040519

来源: mdpi

【 摘 要 】

The composition dependence of glass forming ability in the ternary Al-Cu-Y system is predicted by thermodynamic calculations based on the Miedema’s model and Alonso’s method. By comparing the relative energetic status of the amorphous phase versus the solid solution phase, a hexagonal composition region that energetically favoring the metallic glass formation is predicted. The glass formation driving force and crystallization resistance are further calculated and the composition of Al₇₂Cu₁₀Y₁₈ is pinpointed with the largest glass forming ability in the Al-Cu-Y system. The calculation results are well supported by the experimental observations reported in the literature.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.