Metals (Jun 2015)

Structure and Mössbauer Analysis of Melt-Spun Fe-Pd Ribbons Containing Ni and Co

  • Hanen Rekik,
  • Mahmoud Chemingui,
  • Tarek Bachaga,
  • Amal Cherif,
  • Pere Bruna,
  • Joan Joseph Sunol,
  • Mohamed Khitouni

DOI
https://doi.org/10.3390/met5021020
Journal volume & issue
Vol. 5, no. 2
pp. 1020 – 1028

Abstract

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Fe68.45Pd28.21Co1.66Ni1.66 alloy in ribbon geometry was produced by melt spinning. The microstructure of the samples was examined using scanning electron microscopy. The structural identification of the as-spun ribbon sample and the annealed ones was performed by means of X-ray diffraction. All the Bragg peaks were indexed based on an fcc type structure of (γ-Fe, Pd) phase with a lattice parameter a = 3.742 (3) Å. This result was proved by Mössbauer technique. The annealed ribbon at 600 °C shows an L10 ordered fct structure. An endothermic reaction at T = 358 °C followed by an exothermic one at 390 °C were observed on heating. These reactions were attributed to the Curie temperature of nickel and to the annihilation of an excess of quenched-in vacancies, respectively.

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