Interaction between Substitutional Impurities and Hydrogen in Face-centred Cubic Transition Metals

1.高频内耗测量仪的研制研制了一种用于激励和检测簧片弯曲振动的电路，并将其安装在该仪器中。检测到的电信号的电平不够高；需要进一步改进。用内耗和磁后效测量方法研究了镍基稀合金中氢的局域重取向引起的镍中氢替代杂质络合物的弛豫。Ni-2%Ti-H单晶的内耗表明，氢原子并不位于与替位钛原子最近的八面体位置。在外加磁场的作用下，弛豫峰高度减小。这一弛豫过程可能涉及到一些磁源机制。测量了有序和无序Ni_3Fe合金充氢后的内耗和磁后效。氢相关内耗峰高度的依赖关系，以及外场对峰高的影响，与对稀合金的观察结果相似。磁能对弛豫的贡献必须进一步详细研究。

1. Development of a high-frequency internal friction measurement apparatusAn electric circuit for the excitation and detection of flexural vibration of a reed specimen has been made, and has been set into the apparatus. The level of the detected electrical signal is not sufficiently high ; further improvements are necessary.2. Relaxation due to hydrogen-substitutional impurity complexes in nickelRelaxation due to local reorientation of hydrogen in Ni-based dilute alloys has been investigated by internal friction and magnetic aftereffect measurements. The internal friction of a Ni-2%Ti-H single crystal suggest that hydrogen atoms are located not at the nearest neighbour octahedral position to the substitutional Ti atom. The height of the relaxation peak is found to be decreased by an application of external magnetic field. It is possible that the relaxation process involves some mechanisms of magnetic origin.3. Relaxation due to hydrogen in ordered/disordered Ni_3Fe alloys.Internal friction and magnetic aftereffect have been measured also on ordered and disordered Ni_3Fe alloys charged with hydrogen. The dependence of the height of the hydrogen-related internal friction peak, as well as the effect of external field on the peak height, is similar to the one observed for the dilute alloys. Contributions of magnetic energy to the relaxation must be studied further in detail.