Abstract
X-ray diffraction (XRD) experiments have been carried out to determine the structure and volume fractions of various phases present in Cu-Fe-Pd alloys. The volume percentage of each phase has been determined from integrated intensity of Bragg’s peaks. The results can be divided into two parts on the basis of alloy composition. The alloys with 5 at.% Pd contain disordered face centered cubic (fcc) type as a major phase with traces of body centered cubic (bcc) (α-Fe) phase, whereas the alloys with Pd content ranging from 9–20 at.% contain ordered Cu₃Au-type phase of Cu-Fe-Pd as a major phase with traces of α-Fe phase. The ordering in various alloys persists up to 1173 K. The results have been explained on the basis of binary phase diagram of Cu-Pd system.

Key words
crystal structure, metals and alloys, phase transformations

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