“…In contrast to Figure 2, Figure 3 shows higher magnification images of some of the more oxidation-resistant materials at 1200°-1350°C in 3.4 bar steam. Figure 3a and 3b illustrate the slower growth rate of α-Al 2 O 3 (parabolic rate constant of ~3 x 10 -12 g 2 /cm 4 s) compared to Cr 2 O 3 (3 x 10 -10 g 2 /cm 4 s) under these conditions [11]. The E-Brite alloy formed an incomplete layer of SiO 2 at the metal-oxide interface (identified by EPMA), which apparently did not slow the chromia scale growth rate [11].…”