Effect of heat treatment on the Nb distribution and corrosion resistance of Zr-Sn-Nb-Fe zirconium alloy  

作　　者：LIU Wenqing GENG Xun LIU Qingdong LI Qiang ZHOU Bangxin YAO Meiyi 

机构地区：[1]Instrurnental Analysis ＆ Research Center, Shanghai University, Shanghai 200444, China

出　　处：《Rare Metals》2008年第2期192-196,共5页稀有金属（英文版）

基　　金：This work was financially supported by the National Science Foundation of China (No.50571056);the National Science Foundation of Shanghai (No.04ZR14057).

摘　　要：After being treated in different ways, Zr-Sn-Nb-Fe alloy specimens are exposed in 0.01mol/L LiOH aqueous solution at 350℃ under 16.8 MPa. The examination of microstructures and second phase particles （SPPs） of these specimens was carried out by high-resolution transmission electron microscopy （HR-TEM）. The specimens treated at 800℃ before the final cold rolling have a better corrosion resistance than those treated at 680℃, and the specimens treated at 500℃, after the final cold rolling, have a better corrosion resistance than those treated at 560℃. TEM examination shows that the SPPs existing in the 800℃/500℃ specimen, which has the best corrosion resistance, contains a lot of Nb element, which results in the reduction of the niobium content in the α-Zr solid solution.After being treated in different ways, Zr-Sn-Nb-Fe alloy specimens are exposed in 0.01mol/L LiOH aqueous solution at 350℃ under 16.8 MPa. The examination of microstructures and second phase particles （SPPs） of these specimens was carried out by high-resolution transmission electron microscopy （HR-TEM）. The specimens treated at 800℃ before the final cold rolling have a better corrosion resistance than those treated at 680℃, and the specimens treated at 500℃, after the final cold rolling, have a better corrosion resistance than those treated at 560℃. TEM examination shows that the SPPs existing in the 800℃/500℃ specimen, which has the best corrosion resistance, contains a lot of Nb element, which results in the reduction of the niobium content in the α-Zr solid solution.

关 键 词：ZIRCALOY heat treatment corrosion resistance MICROSTRUCTURE second phase particles 

分 类 号：TG13[一般工业技术—材料科学与工程]