Phase stability of Fe_(23)Zr_(6)and thermodynamic reassessment of Fe-Zr system  

作　　者：Ze-ting Du Lei Zou Cui-ping Guo Xue-ping Ren Chang-rong Li 

机构地区：[1]Department of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]Northwest Institute for Nonferrous Metal Research,Xi’an 710016,Shaanxi,China

出　　处：《Journal of Iron and Steel Research International》2021年第11期1375-1389,共15页

基　　金：the major scientific and technological projects in Yunnan Province(Grant No.202002AB080001-1);National Natural Science Foundation of China(NSFC)(Grant No.51671025).

摘　　要：The stability of the Fe_(23)Zr_(6)phase in Fe–Zr system was studied,and the partial Fe–Zr phase diagram was revised by means of X-ray diffraction,electron probe microanalysis and differential thermal analysis methods.On the basis of the experimental results in the present work and literature,the Fe–Zr system was reassessed using CALculation of PHAse Diagram(CALPHAD)method.Solution phases,liquid,fcc,bcc and hcp,are modeled as the substitutional solution.The intermetallic compounds,hex.-Fe_(2)Zr,Fe_(2)Zr,FeZr_(2)and FeZr3 phases,are treated as Fe_(2)(Fe,Zr)1,(Fe,Zr)2(Fe,Zr)1,(Fe,Zr)1Zr_(2)and(Fe,Zr)1(Fe,Zr)3 by a two-sublattice model,respectively.The Fe_(23)Zr_(6)phase is treated as stoichiometric compound.A set of self-consistent thermodynamic parameters of the Fe–Zr system was obtained.The results confirm the stability of Fe_(23)Zr_(6)phase,improve the phase diagram of the Fe–Zr system and provide a theoretical reference for the development of Zr alloys.

关 键 词：Fe_(23)Zr_(6) Fe–Zr system Thermodynamic parameter CALPHAD method 

分 类 号：TG14[一般工业技术—材料科学与工程]