Characterization of phases in the Fe-Nb system |
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| Authors: | M T Raposo J D Ardisson A I C Persiano R A Mansur |
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| Institution: | (1) Laboratório de Interaçöes Hiperfinas e Física de Superfícies, Departamento de Física, Universidade Federal de Minas Gerais, CP 702, 30.161 Belo Horizonte, MG, Brazil;(2) Departmento de Ciencias Naturais, FUNREI, Pca D. Helvécio 174, 36.300 S. Joäo del Rei, MG, Brazil |
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| Abstract: | The Fe-Nb system was investigated by means of X-ray diffraction and Mössbauer spectroscopy (at 300 and 77 K), in the range from 1 to 66.7 at%. We have found that the limit of solubility of Fe in Nb at 1100°C is between 3 and 4 at% Fe, and observed the coexistence of the Nb solid solution (Nbss) phase and Fe21Nb19 in the range from 4 to 40 at% Fe. The Mössbauer parameters of all the single phases are reported. The lattice parameters of Nbss phase present no significant variation with the Nb content. The X-ray pattern for the Fe21Nb19 phase could not be solved. The Laves phase Fe2Nb presents Mössbauer and X-ray parameters that agree with the literature. |
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