The equiatomic alloy HfPd has been studied by perturbed angular correlation (PAC) spectroscopy using ¹⁸¹Hf probe to observe its phase transformation with temperature. At room temperature, the martensitic phase of HfPd ($~$57%), Hf₂Pd ($~$19%) and HfPd₂ ($~$24%) have been found. At a slightly higher temperature (373 ​K and above), no phase of HfPd₂ is observed but, both martensitic and cubic austenite phases of HfPd are found. The phase Hf₂Pd is present in the whole temperature range. Up to 573 ​K, the cubic austenite phase of HfPd is found to increase with temperature at the expense of martensitic HfPd phase. At 673 ​K, the phase Hf₂Pd increases abruptly and remains same in the temperature range 673–973 ​K ($~$30%). The cubic HfPd phase remains almost unchanged in this temperature range ($~$38%). From present measurements, beginning of phase transformation from martensitic to austenite is found at a much lower temperature of 373 ​K. In the temperature range 373–973 ​K, both martensitic and austenite phases of HfPd coexist while from previous measurements by differential scanning calorimetry, the cubic austenite to martensitic phase transformation was found at about 823 ​K. XRD measurements at room temperature have also been carried out to identify the different phases of Hf–Pd. The new Hf₂Pd₃ phase of Hf–Pd system that was reported by a sole group has been confirmed from present powder XRD pattern in annealed sample.

通过使用¹⁸¹ Hf探针通过扰动角相关（PAC）光谱研究了等原子合金HfPd，以观察其随温度的相变。在室温下，HfPd的马氏体相（$〜$57％），Hf ₂ Pd（$〜$19％）和HfPd ₂（$〜$已找到24％）。在稍高的温度（373 K及更高）下，未观察到HfPd ₂相，但同时发现了HfPd的马氏体相和立方奥氏体相。Hf ₂ Pd相存在于整个温度范围内。直到573 K，HfPd的立方奥氏体相随温度增加而以马氏体HfPd相为代价。在673 K时，相Hf ₂ Pd突然增加，并且在673-973 K的温度范围内保持不变（$〜$30％）。在此温度范围内，立方HfPd相几乎保持不变（$〜$38％）。从目前的测量结果来看，发现从马氏体到奥氏体的相变开始处于较低的373 K温度下。在373-973 K的温度范围内，HfPd的马氏体和奥氏体相共存，而根据之前的差示扫描量热法测量，发现立方奥氏体向马氏体的相变约为823 K. 还已经在室温下进行了XRD测量，以鉴定Hf-Pd的不同相。单一小组报告的Hf-Pd系统新的Hf ₂ Pd ₃相已从退火样品中的粉末XRD图谱中得到证实。