The effect of bulk carbon impurity on the radiation-induced surface composition modification of V-Cr alloys at elevated temperature

The effect of 1 to 3 keV argon ion sputtering on the surface composition of a V/Cr alloy containing 31.6 at% Cr and carbon as the dominant impurity has been investigated at 300 and 800 K. The results obtained closely parallel those reported previously for V/Cr alloys which contained bulk oxygen impurity. Sputtering at 300 K depletes the surface in Cr whereas at 800 K sputtering enhances the surface Cr concentration. Annealing at 800 K in the …