J. Phys. Colloques
Volume 41, Numéro C8, Août 1980
Fourth International Conference on Liquid and Amorphous Metals
Page(s) C8-890 - C8-893
Fourth International Conference on Liquid and Amorphous Metals

J. Phys. Colloques 41 (1980) C8-890-C8-893

DOI: 10.1051/jphyscol:19808220


F.H.M. Spit, J.W. Drijver, W.C. Turkenburg et S. Radelaar

State University Utrecht, Department of Technical Physics, P.O. Box 80.000, 3508 TA Utrecht, the Netherlands

The hydrogen sorption behaviour of amorphous Cu50Zr50, Ni50 Ti50, Ni61Ti39, Ni62Ti29Zr9, Ni64Zr36, Ni60Nb40 and Ni50Nb50 obtained by melt spinning is described. The first three alloys have a relatively low crystallization temperature and these alloys either could not be made completely amorphous or crystallized during hydrogen sorption. The highest absorption occurs in Ni64Zr36 : about 0.6 hydrogen atom per metal atom at a temperature of 333 K and a hydrogen pressure of 30 bar. Pressure-composition isotherms of Ni64Zr36 show no pressure plateau in the range of temperatures and pressures investigated. The isotherms of crystalline Ni64Zr36 and the intermetallic compound Ni10Zr7 do show such a plateau. During 100 cycles of hydration and dehydration of amorphous Ni64Zr36 splinters, of 0.1 mm spalled off from the pieces of ribbon, but disintegration into still smaller particles was not observed. The X-ray diffraction and DSC-scan after 100 cycles are similar to those of as-quenched material. Magnetization and Rutherford-back-scattering results indicate surface segregation of Ni in a 100 times cycled sample.