The depth profile of composition,chemical state of elements and morphology of as-received and activated amorphous Fe80Zr12B8 alloy ribbons have been studied by meansof Auger electron spectroscopy,X-ray photoelectron spectroscopy and scanning Augermicroprobe combined with Ar ion bombardment.Both dull and free sides of the as-received ribbons were covered with an iron oxide layer.While a pronounced surfacesegregation and oxidation of B and precipitation of microcrystalline α-Fe particleswere observed on both sides of activated ribbons,B and Zr were oxidized selectivelyin subsurface layer.On both sides of ribbons,a porous surface structure formed. TheBET surface area was measured to be increasing from 0.11 to 2.68 m2/g.The principalmechanism of in situ activation has been discussed.
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