Abstract
The equiatomic alloy ZrPd has been studied by perturbed angular correlation (PAC) spectroscopy in the temperature range 298-973 K to observe the martensitic to austenite phase transformation. In ZrPd, a predominant component (∼56%) found at room temperature with values of quadrupole frequency ωQ = 39.5(5) Mrad/s, asymmetry parameter η = 0.44(2) and frequency distribution width δ = 10(2)% is tentatively assigned to the monoclinic martensitic phase of ZrPd. At 373 K, a small component (∼7%) with values of ωQ = 26(3) Mrad/s, η = 0 appears which enhances with temperature at the expense of the martensitic phase and is found to be ∼35% at 973 K. This new component, probably, arises due to structural transition from monoclinic martensitic to cubic austenite phase, a phase transformation reported to occur around 830 K in previous work.
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