PHASE-STABILITY AND NEUTRON-DIFFRACTION STUDIES OF LAVES PHASES ZR(CR(1-X)M(X))(2) WITH M=(CU0.5NI0.5) AND 0-LESS-THAN-X-LESS-THAN-0.2 AND THEIR HYDRIDES
Jl. Soubeyroux et al., PHASE-STABILITY AND NEUTRON-DIFFRACTION STUDIES OF LAVES PHASES ZR(CR(1-X)M(X))(2) WITH M=(CU0.5NI0.5) AND 0-LESS-THAN-X-LESS-THAN-0.2 AND THEIR HYDRIDES, Journal of alloys and compounds, 231(1-2), 1995, pp. 760-765
Laves phases of composition Zr(Cr(1-x)M(x))(2) with M = (Cu0.5Ni0.5) a
nd 0 less than or equal to x less than or equal to 0.2 have been synth
esised with the hexagonal C14- and/or cubic C15-type structures. By X-
ray and neutron diffraction we have determined the structures of the a
lloys, and in particular the sites for the 3d metal substitution. The
position of the hydrogen atoms in the structures and the occupation of
the different sites of the hydrides have been determined. Purity and
quality of polycrystalline alloys have been checked by using scanning
electron microscopy and energy dispersive X-ray analysis techniques. T
he effects of the M/Cr substitution have been studied for phase stabil
ity, maximum hydrogen content and hydrogen site stability and analyzed
in view of applications as electrodes in H-M batteries.