FeCrAl/ZrNbCu复合管包壳高温蒸气氧化行为研究  

High Temperature Steam Oxidation Behavior of FeCrAl/ZrNbCu Dual Layer Tube Cladding

作　　者：柏广海[1] 薛飞[1] 刘二伟[1] 张晏玮[1] 耿建桥[1] 尚灿 党建伟 刘向兵[1] 余伟炜[1] Bai Guanghai;Xue Fei;Liu Erwei;Zhang Yanwei;Geng Jianqiao;Shang Can;Dang Jianwei;Liu Xiangbin;Yu Weiwei(Suzhou Nuclear Power Research Institute,Suzhou 215004,China)

机构地区：[1]苏州热工研究院有限公司,江苏苏州215004

出　　处：《稀有金属材料与工程》2020年第9期3071-3076,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(U1867202,U1867215);苏州市2016产业技术创新专项(SYG201634)。

摘　　要：研究了FeCrAl/ZrNbCu复合管蒸气氧化行为,结果表明,外层FeCrAl材料具有优异的抗蒸气氧化性能,有效保护了内层Zr合金管。氧化产物分析表明,FeCrAl合金氧化膜呈凹凸状,氧化产物为Fe2O3、FeCr2O4、Cr2O3和Al2O3;ZrNbCu合金氧化膜垂直于表面生长,氧化产物为ZrO2和Nb2O5;在1000℃氧化时复合管界面没有明显元素扩散;在1100和1200℃氧化后界面发生明显元素扩散。复合管外侧到内侧分别为FeCrAl氧化膜、FeCrAl合金、Fe CrAl-ZrNbCu扩散层、ZrNbCu合金、ZrNbCu氧化膜;界面结合方式由机械结合转变为冶金结合。The high-temperature steam oxidation behavior of FeCrAl/ZrNbCu dual layer tube was studied.The results show that the outer layer FeCrAl material has excellent high temperature steam oxidation resistance,and the inner ZrNbCu alloy layer can be effectively protected by FeCrAl alloy.The concave and convex morphology of oxide film of FeCrAl alloy is formed,and the oxidation products are Fe2 O3,FeCr2 O4,Cr2 O3 and Al2 O3.The oxide film of ZrNbCu alloy grows perpendicular to the surface,and the oxidation products are ZrO2 and Nb2 O5.Element diffusion at the interface of the dual layer tube cannot be found when it is oxidized at 1000℃there is obvious element diffusion at the interface when it is oxidized at 1100℃and 1200℃.From the outer side to the inner side of the dual layer tube,FeCrAl oxide film,FeCrAl alloy,FeCrAl-ZrNbCu diffusion layer,ZrNbCu alloy and ZrNbCu oxide film are formed in sequence;the original mechanical bonding transforms to metallurgical bonding when the temperature is above 1100℃.

关 键 词：燃料包壳 FeCrAl/ZrNbCu复合管 高温蒸气氧化 氧化膜 元素扩散 

分 类 号：TB331[一般工业技术—材料科学与工程]