Abstract
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 (gamma-Fe, Pd) phase with a lattice parameter a = 3.742 (3) angstrom. This result was proved by Mossbauer technique. The annealed ribbon at 600 degrees C shows an L1(0) ordered fct structure. An endothermic reaction at T = 358 degrees C followed by an exothermic one at 390 degrees 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.