Abstract Equilibria in the hydrogen-intermetallics systems with high dissociationpressure ( P d ⩾ 0.5 MPa at room temperature) were studied in a wide pressure range from 0.1 to 40 MPa. The survey has covered Ce x La 1− x Ni 5− y Al y -H 2 , Ce x La 1− x Ni 4 Co H 2 and Ti 1− x Zr x Cr 1.8− y Fe y -H 2 systems. The Ce x La 1− x Ni 5− y Al y -H 2 systems are characterized by the critical temperatures being
摘要 研究了具有高离解压力(室温下 P d ⩾ 0.5 MPa)的氢-金属间化合物体系在0.1至40 MPa的宽压力范围内的平衡。调查涵盖了Ce x La 1− x Ni 5− y Al y -H 2 、Ce x La 1− x Ni 4 Co H 2 和Ti 1− x Zr x Cr 1.8− y Fe y -H 2 系统。Ce x La 1- x Ni 5- y Al y -H 2 系统的特征在于临界温度低于相同x时Ce x La 1- x Ni 4 Co H 2 的临界温度。对于窄范围的合金成分(x0.5 和 y0.1),在超过临界点的 Ce x La 1- x Ni 5- y Al y -H 2 中出现亚稳态氢化物相。六方 Laves 相 Ti 1− x Zr x Cr 1.8− y Fe y 形成的氢化物在所研究的三个系统中具有最高的解吸压力。然而,它们与氢的相互作用导致向立方相的相变。在高于
Ferromagnetic CrxTi1−xN solid solution nitride thin films grown by pulsed laser deposition and their magnetoresistance
Epitaxial nitridefilms of CrxTi1−xN were grown on MgO (001) by pulsedlaserdeposition under nitrogen radical irradiation, and their magnetic and transport properties were investigated, which was motivated by calculations on magnetism pointing out similarities of CrN to LaMnO3, the parent compound of colossal magnetoresistance oxides. The films showed ferromagnetism for 0.28⩽x⩽0.5 and the TC showed
Nitrogen and transition-metal codoped titania nanotube arrays for visible-light-sensitive photoelectrochemical water oxidation
作者:Tomiko M. Suzuki、Gaku Kitahara、Takeo Arai、Yoriko Matsuoka、Takeshi Morikawa
DOI:10.1039/c4cc02571g
日期:——
Vertically aligned titanium dioxide nanotube (TNT) arrays codoped with nitrogen and 3d transition metals were successfully fabricated using anodization and nitridation processes. The codoping of N and Fe yielded the highest visible-light-induced photoelectrochemical water oxidation due to bandgap narrowing of impurity levels by N and Fe.
A Born-Mayer approach to the hydrogen potential in C-15 Laves phase compounds
作者:J.F Fernandez、M Kemali、D.K Ross、C Sanchez
DOI:10.1016/s0925-8388(99)00320-5
日期:1999.12
The potential wells seen by hydrogen in several interstitial sites in the C-15Lavesphasecompounds ZrTi 2 , ZrCr 2 and TiCr 1.85 have been investigated using incoherent inelastic neutron scattering (IINS) data. Parameters describing the harmonic terms in the H-potential well in the three compounds are obtained from the first localised hydrogen vibrations as measured by IINS. The H-potential well
An empirical potential for interstitial hydrogen in some C-15 Laves phase compounds from IINS measurements
作者:J F Fernández、M Kemali、D K Ross、C Sánchez
DOI:10.1088/0953-8984/11/50/327
日期:1999.12.20
The potential wells seen by hydrogen in several interstitial sites in the C-15Lavesphasecompounds, ZrTi2 (ZT), ZrCr2 (ZC) and TiCr1.85 (TC), have been investigated using incoherent inelastic neutron scattering (IINS) data. Parameters describing the harmonic terms in the H-potential well in the three compounds are obtained from the first localized hydrogen vibrations as measured by the IINS technique
已经使用非相干非弹性中子散射 (IINS) 数据研究了氢在 C-15 Laves 相化合物 ZrTi2 (ZT)、ZrCr2 (ZC) 和 TiCr1.85 (TC) 的几个间隙位点中看到的势阱。描述三种化合物中 H 势阱中谐波项的参数是从 IINS 技术测量的第一次局部氢振动中获得的。H 势阱是由氢和形成不同类型四面体位置的四个金属原子之间的成对势之和产生的,这些四面体位置在 C-中标记为 g (A2B2)、e (AB3) 或 b (B4) 15 结构。Born-Mayer 势已用于对这些成对相互作用进行建模,参数由 IINS 确定。由此产生的整体势能表面很好地描述了观察到的位点占有率和 H 在 ZC 和 TC 化合物中的扩散行为。另一方面,由于 ZT 样品的 H 含量较高,因此模型中必须包含 HH 相互作用,以便正确描述该化合物中的势能阱。势能面使我们能够识别 C-15 结构中 H 的