화학공학소재연구정보센터
Journal of Vacuum Science & Technology A, Vol.24, No.4, 1460-1463, 2006
Adsorption of sulfur dioxide on Zircaloy-4 at 300 K
We investigate the interaction of sulfur dioxide (SO2) with Zircaloy-4 (Zq-4) surfaces after adsorption at 300 K. A shift in the Zr(MNN) feature toward lower energies of about 3 eV is observed following saturation exposures, indicating oxidation of Zr by dissociated oxygen. Temperature programed desorption experiments indicate irreversible adsorption. Relatively short Ar-ion sputtering removes sulfur from the near-surface region without significantly affecting the oxygen Auger signal. Annealing of the SO2/Zry-4 system results in dissolution of oxygen into the bulk, leaving sulfur in the near-surface region. (c) 2006 American Vacuum Society.