Growth of Hierarchically Structured High-Surface Area Alumina on FeCrAl Alloy Wires

Figure 4

Varied morphology when isothermally oxidized at 1000°C for 0.5 h–16 h.

(a) 0.5 h

(b) 1 h

(c) 2 h

(d) 4 h

(e) 8 h

(f) 16 h