2-6

Fig.2-6 (a) Appearance and (b) optical micrograph (left side) and EDS mapping result of nitrogen (right side) of a cross-section of the specimen exposed to steam with a 70 % air fraction at 1273 K for 2400 s

Zirconium nitrides (ZrN) and large pores can be observed near the interface between the oxide and α-Zr(O) layers.

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