126715.fig.002a
(a)
126715.fig.002b
(b)
126715.fig.002c
(c)
126715.fig.002d
(d)
126715.fig.002e
(e)
126715.fig.002f
(f)
126715.fig.002g
(g)
126715.fig.002h
(h)
Figure 2: SEM images of the Cu52.5Hf40Al7.5 amorphous ribbon etched in different acid solutions (a) 0.5 M HF for 4 min; (b–f) 0.05 M HCl for (b) 6 h, (c) 8 h, (d) 14 h, (e) 20 h, and (f) 24 h; (g-h) EDS analysis in (f): (g) point A (h) point B.