Martensitic transformation and phase equilibrium in near equiatomic Zr–Pd alloys

Martensitic transformation behavior and phase equilibrium in Zr–Pd alloys have been investigated. Near equiatomic Zr–Pd alloys quenched from above 1073 K undergo a martensitic transformation at around 830 K. However, the ZrPd compound transforms to Zr 13Pd 12 and Zr 9Pd 11 compounds by a eutectoid reaction at about 1040 K. It is also found that the Zr 13Pd 12 compound forms by a peritectoid reaction between Zr 2Pd and ZrPd at about 1100 K. A modified equilibrium phase diagram between Zr 2Pd and Zr 3Pd 4 in the Zr–Pd binary system is proposed.