Phase diagram of near equiatomic Zr-Pd alloy

The exact eutectoid and peritectoid temperatures in near equiatomic Zr-Pd compositions have been determined by using the diffusion couple method and microstructure analysis. The crystal structure of Zr₁₃Pd₁₂ compound were estimated to be orthorhombic with a = 1.78 nm, b = 0.80 nm and c = 1.00 nm from the electron diffraction experiments. The Zr₁₃Pd₁₂ compound is formed at 1100 ± 2 K with a peritectoid reaction between Zr₂Pd and ZrPd compounds. The ZrPd compound transforms to Zr₁₃Pd₁₂ and Zr₉Pd₁₁ compounds by a eutectoid reaction at 1028 ± 4 K. Based on these results, the phase diagram of near equiatomic Zr-Pd binary system is reconstructed.