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

面心立方过渡金属中替代杂质与氢的相互作用

• 批准号: 02650462
• 负责人: NUMAKURA Hiroshi
• 金额: $ 0.32万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650462/
• 关键词: Hydrogen; Nickel-based Alloys; Internal Friction; Magnetic Aftereffect; 磁歪; 磁壁移動

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.

1.高频内耗测量装置的研制制作了用于激励和检测簧片样品弯曲振动的电路，并将其安装到该装置中。检测到的电信号电平不够高；还需要进一步改进。2．镍中氢取代杂质复合物引起的弛豫镍基稀合金中氢的局部重新取向引起的弛豫已通过内摩擦和磁后效应测量进行了研究。 Ni-2%Ti-H 单晶的内耗表明氢原子并不位于与取代的 Ti 原子最近的八面体位置。发现弛豫峰的高度通过施加外部磁场而降低。弛豫过程可能涉及某些磁源机制。3．有序/无序 Ni_3Fe 合金中氢引起的弛豫。还测量了充有氢的有序和无序 Ni_3Fe 合金的内摩擦和磁后效应。与氢相关的内耗峰高度的依赖性以及外场对峰高度的影响与在稀合金中观察到的类似。磁能对弛豫的贡献必须进一步详细研究。

项目成果

Numakura,H.,Okamoto,N.,Koiwa,M.: "Effect of magnetic field on the internal friction peaks in NiーTiーH and Ni_3FeーH alloys" Philosophocal Magazine Part A.

Numakura, H.、Okamoto, N.、Koiwa, M.：“磁场对 Ni-Ti-H 和 Ni_3Fe-H 合金内耗峰值的影响”哲学杂志 A 部分。