【摘 要】
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The stability of the Fe23Zr6 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 experi-mental results i
【机 构】
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Department of Materials Science and Engineering,University of Science and Technology Beijing,Beijing
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The stability of the Fe23Zr6 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 experi-mental results in the present work and literature,the Fe-Zr system was reassessed using CALculation of PHAse Dia-gram (CALPHAD) method.Solution phases,liquid,fcc,bcc and hcp,are modeled as the substitutional solution.The intermetallic compounds,hex.-Fe2Zr,Fe2Zr,FeZr2 and FeZr3 phases,are treated as Fe2(Fe,Zr)1,(Fe,Zr)2(Fe,Zr)1,(Fe,Zr)1Zr2 and (Fe,Zr)1(Fe,Zr)3 by a two-sublattice model,respectively.The Fe23Zr6 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 Fe23Zr6 phase,improve the phase diagram of the Fe-Zr system and provide a theoretical reference for the development of Zr alloys.
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