An electron spectroscopic study of the surface oxidation of glassy and crystalline Cu-Zr alloys

Sen, P and Sarma, DD and Budhani, RC and Chopra, KL and Rao, CNR (1984) An electron spectroscopic study of the surface oxidation of glassy and crystalline Cu-Zr alloys. In: Journal of Phys F: Metal Physics, 14 (2). pp. 565-577.

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Abstract

Surface oxidation of three metglasses in the Cu-Zr system has been investigated by employing X-ray photoelectron spectroscopy and Auger electron spectroscopy with a view to comparing their oxidation behaviour with that of the corresponding crystalline states of the alloys. Surface oxidation of pure Zr metal has also been examined in detail using these techniques. Sub-oxides of Zr are formed during the initial stages of oxidation of Zr (at oxygen exposures <10L), while at higher exposures, ZrO2 is formed together with the highest possible sub-oxide which the authors designate as 'ZrO'. The relative proportion of 'ZrO' goes through a maximum in the range 25-50 L. Both the glassy and the crystalline states of the Cu-Zr alloys exhibit preferential oxidation of Zr. The glassy alloys exhibit a higher rate of oxidation at intermediate exposures compared with the crystalline states of the alloys; the extent of oxidation at higher oxygen exposures is, however, higher for crystalline alloys. Interatomic Auger transitions have been found in the Zr+O2 system as well as in Cu-Zr alloys.

Item Type:	Journal Article
Publication:	Journal of Phys F: Metal Physics
Publisher:	Institute of Physics
Additional Information:	Copyright for this article belongs to Institute of Physics.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	05 Feb 2010 05:36
Last Modified:	19 Sep 2010 05:48
URI:	http://eprints.iisc.ac.in/id/eprint/24079

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