Zr─4合金氧化膜中Zr（Fe，Cr）2第二相粒子的HREM观察  

HREM OBSERVATION OF SECONDARY PHASE PARTICLES Zr(Fe,Cr) 2 IN OXIDE SCALE OF ZIRCALOY 4

作　　者：李聪[1] 周邦新[1] 苗志[1] 戴吉岩[2] 

机构地区：[1]中国核动力研究设计院核燃料及材料重点实验室 [2]中国科学院金属研究所固体原子像开放研究实验室

出　　处：《腐蚀科学与防护技术》1996年第3期242-246,共5页Corrosion Science and Protection Technology

基　　金：金属腐蚀与防护国家重点实验室课题;国际原子能机构(IAEA)的资助

摘　　要：应用透射电子显微镜（ＴＥＭ）和高分辨电子显微镜（ＨＲＥＭ）研究了在４００℃，１０．３ＭＰａ过热蒸汽中形成Ｚｒ－４合金氧化膜中的Ｚｒ（Ｆｅ，Ｃｒ）２第二相粒子。结果表明，嵌在合金氧化膜中的Ｚｒ（Ｆｅ，Ｃｒ）２粒子表面生成面心立方结构的Ｚｒ６（Ｆｅ，Ｃｒ）３Ｏ，它与Ｚｒ（Ｆｅ，Ｃｒ）２存在共格关系。在上述氧化物之上为氧化物立方ＺｒＯ２和金属相α－Ｆｅ（Ｃｒ）的混合物。The secondary phase particles Zr(Fe,Cr) 2 embaded in the formed oxide scale on the surface of an oxidized zircaloy 4 were characterized by means of TEM and HREM. The Zircaloy 4 has been oxidized in superheated steam vapour at 10.3 MPa at 400℃ for 14 days forming an oxide scale of thickness around 1.9 μm. The results showed that on the periphery of the particle Zr(Fe,Cr) 2 an oxide with the formula of Zr 6(Fe,Cr) 3O was observed, which showed a coherent relationship with the particle Zr(Fe,Cr) 2. Further outward there was a mixture of cubic ZrO 2 and metallic phase α Fe(Cr), e.g. the mixture laid between the cubic Zr 6(Fe,Cr) 3O and the monolithic oxide ZrO 2, the later originated from the matrix of the zircaloy 4. The influence of the secondary phase particles on the oxidation behavior of the alloy is also discussed.

关 键 词：ZR-4合金 第二相粒子 氧化 电子显微镜 水侧腐蚀 

分 类 号：TG172.5[金属学及工艺—金属表面处理]