Mutual impact of crystal volume and heat of alloy formation on hydride stabilities in Zr(PdxCr1−x)2 and similar intermetallics
作者:D. Babai、M. Bereznitsky、R.Z. Shneck、I. Jacob
DOI:10.1016/j.jallcom.2019.152268
日期:2020.1
Abstract Hydrides of Zr(PdxCr1−x)2 pseudobinary compounds (x = 0.05, 0.1, 0.175) exhibit slight destabilization and more sloped hydrogen plateau pressures with the increase of the palladium content. The former feature conforms to the rule of reverse stability but violates the trend of increased hydride stability upon increasing the unit cell intermetallic volume. A combination of the two effects, the
Electrode characteristics of metal hydride electrodes prepared by mechanical alloying
作者:Chang Bo Jung、Kyung Sub Lee
DOI:10.1016/s0925-8388(96)03044-7
日期:1997.5
and AB 2 (ZrCr 2 ) type metal hydride have been produced by a mechanicalalloying (MA) process and their electrochemical characteristics have been evaluated for use in Ni/MH batteries. Ti–Fe alloys showed an amorphous state after 40 h of ball milling, but Zr–Cr alloys revealed a mixture of nanocrystalline ZrCr 2 and an amorphous state. MA Ti–Fe alloys showed a higher discharge capacity and a shorter
dissociation pressures of the ZrMn2T0.8 hydrides. In the series of ZrMn2T0.8 hydrides there is a pronounced minimum for hydride of ZrMn2Co0.8, accounting for the extraordinarily high decomposition pressure of this system. Site occupancies, provided by published neutron diffraction studies, were used to calculate configurational entropies of ZrCr2hydrides and relatedsystems. Results obtained were in fair agreement
NMR study of hydrogen mobility in C14- and C15-type compounds ZrCr2Hx
作者:A.V. Skripov、M.Yu. Belyaev、A.P. Stepanov
DOI:10.1016/0038-1098(91)90253-r
日期:1991.6
Abstract NMR measurements of the proton spin-lattice relaxation times in the C14- and C15-typecompounds ZrCr2Hx(0.3 ⩽ x ⩽ 3.5) have been performed over the temperature range 10–385 K. The experimental results are analyzed to obtain the electronic (Korringa) contributions to relaxation rates and parameters of hydrogenmotion. For both structural types the hydrogen mobility is found to increase with
摘要 对 C14 和 C15 型化合物 ZrCr2Hx(0.3 ⩽ x ⩽ 3.5) 中质子自旋晶格弛豫时间的 NMR 测量已在 10-385 K 的温度范围内进行。对实验结果进行分析以获得电子 ( Korringa) 对氢运动的弛豫率和参数的贡献。对于这两种结构类型,发现氢迁移率随着 H 含量的降低而增加。在 C15-ZrCr2H0.3 中,氢跃迁率足够高,导致几乎完整的 1H NMR 谱线在 78 K 处变窄。
Equilibrium, X-Ray, and<sup>1</sup>H-NMR Studies of the ZrCr<sub>2</sub>–H System
The pressure isotherms of the ZrCr2–H system (20–200 °C, 10–700 Torr) and powder X-ray diffraction have shown the occurrence of two phases, cubic ZrCr2Hx (x<1.0) and hexagonal ZrCr2Hx (2.5
ZrCr2-H 体系(20-200 °C,10-700 托)的压力等温线和粉末 X 射线衍射表明存在两种相:立方 ZrCr2Hx(x<1.0)和六方 ZrCr2Hx(2.5