Fe22Cr5Al3Mo-xY合金在模拟LOCA下的高温蒸汽氧化行为

Fe22Cr5Al3Mo-xY合金在模拟LOCA下的高温蒸汽氧化行为

孙蓉蓉, 姚美意, 王皓瑜, 张文怀, 胡丽娟, 仇云龙, 林晓冬, 谢耀平, 杨健, 董建新, 成国光

High-Temperature Steam Oxidation Behavior of Fe22Cr5Al3Mo-xY Alloy Under Simulated LOCA Condition

SUN Rongrong, YAO Meiyi, WANG Haoyu, ZHANG Wenhuai, HU Lijuan, QIU Yunlong, LIN Xiaodong, XIE Yaoping, YANG Jian, DONG Jianxin, CHENG Guoguang

图8 FeCrAl合金在高温蒸汽中的氧化过程示意图

Fig.8 Schematics of oxidation process of FeCrAl alloys in high-temperature steam
(a) Fe _x O _y is preferentially formed on the alloy surface
(b) the mixed oxide region of Cr and Al is formed
(c) Cr₂O₃ formed at the interface between Fe _x O _y and the mixed oxide region of Cr and Al, while the Al₂O₃ formed at the oxide/metal (O/M) interface
(d) at high temperature, Cr₂O₃ converts to CrO₃ and evaporates, and Fe _x O _y reacts with high-temperature steam to produce volatile hydroxide
(e) as the oxidation goes on, the γ-Al₂O₃ transforms into α-Al₂O₃
(f) the oxide film of FeCrAl alloy is α-Al₂O₃ under the condition of high-temperature steam