Modelling thermodynamics of nanocrystalline binary interstitial alloys

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2018,（4）
• 页码范围: 613-619
• 页数: 7页
• 语种: 英文

摘要

Grain boundary (GB) segregation in nanocrystalline alloys can cause reduction of GB energy,which leads to thermodynamic stabilization of nanostructures.This effect has been modelled intensively.However,the previous modelling works were limited to substitutional alloy systems.In this work,thermodynamics of nanocrystalline binary interstitial alloy systems was modelled based on a two-sublattice model proposed by Hillert [M.Hillert,et al.Acta Chem.Scand.,24 (1970) 3618] and an atomic configuration for nanocrystalline systems proposed by Trelewicz and Schuh [J.R.Trelewicz,et al.Physical Review B,79 (2009) 094112].The modelling calculations agree with the reported experimental data,indicating thatthe current thermodynamic model is capable of accounting for the alloying effect in the nanocrystalline binary interstitial alloys.