Abstract
The temperature dependence of magnetization together with neutron powder thermo-diffraction show that nominal ball milled Fe 30 Cr 70 for 110 h is formed of two mixed phases (Fe 20 Cr 80 + Fe), both of them with body centered cubic crystal structure and very close values for the lattice parameter (∼2.87 Å). On heating above 900 K, the system exhibits an irreversible structural transformation, giving rise to the homogenization of the material, and then recovering the well-defined starting composition Fe 30 Cr 70 . Subsequent heating-cooling neutron thermo-diffraction cycles do not show any additional transformation, thus explaining the overlapping M ( T ) curves after the first heating.
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