The specific heat under constant pressure, C-p, of intermetallic compounds Hf2Fe, Hf2Co and Hf2Rh with the Ti2Ni structure was obtained by means of differential thermal analysis in the temperature range 275-740 K. The results differ significantly from the Debye theory, even when a correction for optical phonons in Einstein approximation is considered, which indicates existence of a defect contribution to the specific heat. Relative entropy has been determined and the obtained results were fitted and analysed. The anomalous temperature behaviour of C, is discussed, having in mind results of previous investigations of these and similar systems, obtained by other methods.
The nuclear quadrupole interaction of in the intermetallic compound
differential perturbed angular correlation technique has been used to measure the electric field gradient at impurities in the intermetallic compound . The results of the measurements show the presence of two independent quadrupoleinteractions. At room temperature the interaction frequencies are and . The electric field gradient , the corresponding asymmetry parameter and the distribution parameter exhibit a
时间微分扰动角相关技术已被用于测量金属间化合物中杂质处的电场梯度。测量结果表明存在两个独立的四极杆相互作用。在室温下,相互作用频率为 和 。电场梯度、相应的不对称参数和分布参数在 78 到 1223 K 之间表现出明显的温度依赖性。
Hydrogen absorption in various zirconium- and hafnium-based intermetallic compounds