Oxide Layers on(0001) Plane of Zircaloy-4 After Corrosion at 360 °C in Lithiated Aqueous Solution  

作　　者：Shao-Qiu Gou Bang-Xin Zhou Mei-Yi Yao Jian-Chao Peng Chuan-Ming Chen Qiang Li Jin-Long Zhang 

机构地区：[1]Institute of Materials, Shanghai University [2]Laboratory for Microstructures,Shanghai University

出　　处：《Acta Metallurgica Sinica(English Letters)》2015年第6期748-757,共10页金属学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 51171102 and 51271104)

摘　　要：The microstructures of the oxide layers formed on near （0001） plane of Zircaloy-4 were investigated by autoclave tests at 360 ℃ in lithiated aqueous solution. Oxygen-rich regions with hcp structure were observed at the undulating O/M interface, and the inner surface morphology of the oxide layers formed on （0001） was only concave- convex. Monoclinic, tetragonal and cubic phases and a kind of zirconium sub-oxide with bcc structure were detected in the oxide layer near the metal matrix. This zirconium sub-oxide layer had a coherent relationship with a-Zr matrix, and the growth direction of the zirconium sub-oxide layer was nearly parallel to the [0001] direction of a-Zr regardless of the orientation of metal matrix. The orientations scattering of columnar grains formed on near （0001） plane differ from that formed on near （1010） plane.The microstructures of the oxide layers formed on near （0001） plane of Zircaloy-4 were investigated by autoclave tests at 360 ℃ in lithiated aqueous solution. Oxygen-rich regions with hcp structure were observed at the undulating O/M interface, and the inner surface morphology of the oxide layers formed on （0001） was only concave- convex. Monoclinic, tetragonal and cubic phases and a kind of zirconium sub-oxide with bcc structure were detected in the oxide layer near the metal matrix. This zirconium sub-oxide layer had a coherent relationship with a-Zr matrix, and the growth direction of the zirconium sub-oxide layer was nearly parallel to the [0001] direction of a-Zr regardless of the orientation of metal matrix. The orientations scattering of columnar grains formed on near （0001） plane differ from that formed on near （1010） plane.

关 键 词：Zircaloy-4 （0001） plane Oxide/metal interfaces Microstructure Oxygen-rich regions Zirconium sub-oxide 

分 类 号：TG146.414[一般工业技术—材料科学与工程]