SMALL-ANGLE NEUTRON-SCATTERING WITH HYDROGENATED AMORPHOUS CU50TI50 AND NI-TI-SI ALLOYS

The metallic glasses Cu50Ti50, Ni30Ti60Si10, Ni32Ti52Si16, Ni16Ti68Si1 6 and Ti84Si16 were produced by melt spinning. The alloys in the blank state as well as after loading with hydrogen or deuterium were invest igated by small angle neutron (SANS) and X-ray (SAXS) scattering. The scattering of the different amorphous alloys exhibited common features . SANS follows a power-law with exponent of the scattering vector betw een -3 and -4. The melt-spun glasses contain extended structural inhom ogeneities which are associated rather with the local composition than with the local density. SAXS measurements did not show effects above the background level. Loading the alloys with hydrogen or deuterium ca uses strong effects in the SANS behaviour. From the results it is conc luded that the amorphous alloys contain inner surfaces where the hydro gen atoms segregate.