The investigation of the Zr1-yTiy(Cr1-xNix)2-H2 system 0.0≤y≤1.0 and 0.0≤x≤1.0 phase composition analysis and thermodynamic properties

被引:29
作者
Bououdina, M [1 ]
Enoki, H [1 ]
Akiba, E [1 ]
机构
[1] Natl Inst Mat & Chem Res, Tsukuba, Ibaraki 305, Japan
基金
日本科学技术振兴机构;
关键词
laves phases; multiphase system; hydrogen in metals; kinetics;
D O I
10.1016/S0925-8388(98)00792-0
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The Zr1-yTiy(Cr1-xNix)(2) compounds were synthesized and characterized by means of X-ray powder diffraction. From the Rietveld analysis carried out on the alloys, we determined the phase abundancy and refined the crystal structure. The system crystallized with hexagonal C14-type structure for nickel content less than x = 1.0 with some amount of additional phases (ZrNi, Zr9Ni11, Zr7Ni10, TiNi) and pure metals (Ni and Cr). For higher nickel concentrations, the system crystallized in the cubic C15-type structure. The amount of additional phases increased with increasing nickel and titanium content. The Pressure-Composition-Temperature measurements using a volumetric method were carried out at 313 K on some selected alloys. The single phase systems were found to absorb a large amount of hydrogen (H/M less than or equal to 1.8 wt.%) but had very poor kinetics. The multiphase systems were found to behave as a single phase (presence of single plateau), have a relatively good hydrogen capacity (H/M less than or equal to 1.4 wt.%) and exhibit faster kinetics. A Linear correlation between the heat of formation of the Zr1-yTiy(Cr1-xNix)(2) hydrides estimated from the band structure model and the unit cell volume of the alloys determined from the X-ray Rietveld analysis was obtained. It shows a decrease of hydride stability with increasing unit cell volume. (C) 1998 Published by Elsevier Science S.A. All rights reserved.
引用
收藏
页码:290 / 300
页数:11
相关论文
共 29 条
  • [1] [Anonymous], LA2345 LOS AL SCI LA
  • [2] Structural studies of laves phases Zr(Cr1-xNix)(2) with 0<=x<=0.4 and their hydrides
    Bououdina, M
    Soubeyroux, JL
    Fruchart, D
    deRange, P
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 1997, 257 (1-2) : 82 - 90
  • [3] BOUOUDINA M, 1995, THESIS J FOURIER U G
  • [4] THE INFLUENCE OF SI AND GE ON THE HYDROGEN SORPTION PROPERTIES OF THE INTERMETALLIC COMPOUND ZRCR2
    DRASNER, A
    BLAZINA, Z
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 1993, 199 (1-2) : 101 - 104
  • [5] ON THE STRUCTURAL AND HYDROGEN DESORPTION PROPERTIES OF THE ZR(CR1-XCUX)2 ALLOYS
    DRASNER, A
    BLAZINA, Z
    [J]. JOURNAL OF THE LESS-COMMON METALS, 1991, 175 (01): : 103 - 108
  • [6] ON THE STRUCTURAL AND HYDROGEN DESORPTION PROPERTIES OF THE ZR(CR1-XNIX)2 ALLOYS
    DRASNER, A
    BLAZINA, Z
    [J]. JOURNAL OF THE LESS-COMMON METALS, 1990, 163 (01): : 151 - 157
  • [7] NEUTRON-DIFFRACTION IN TI1.2MN1.8 DEUTERIDE - STRUCTURAL AND MAGNETIC ASPECTS
    FRUCHART, D
    SOUBEYROUX, JL
    HEMPELMANN, R
    [J]. JOURNAL OF THE LESS-COMMON METALS, 1984, 99 (02): : 307 - 319
  • [8] FUJITANI S, 1991, J LESS-COMMON MET, V172, P220, DOI 10.1016/0022-5088(91)90451-9
  • [9] GRIESSEN R, 1988, TOP APPL PHYS, V63, pCH6
  • [10] GUEGAN AP, 1995, NATO ASI SERIES E, V281, pCH5