Nb离子注入对Zr-4合金耐蚀性能的影响  

Effect of Niobium Implantation on the Corrosion Resistance of Zircaloy-4

作　　者：余任泓[1] 白新德[1] 陈小文[1] 金兆熊[1] 

机构地区：[1]清华大学,北京100084

出　　处：《稀有金属材料与工程》2003年第12期1057-1060,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(G2000067207-1)

摘　　要：为了研究Nb离子注入对Zr-4合金电化学腐蚀性能的影响,对Zr-4合金试样表面进行不同剂量的Nb离子注入并测定其在1NH2SO4水溶液中的极化曲线,然后使用扫描电子显微镜(SEM)对极化实验后的试样表面形貌进行了观察。结果表明,Nb离子注入能够改善Zr-4合金的耐腐蚀性能,而且改善的程度与注入离子的剂量有关。同时使用X射线光电子能谱分析(XPS)对试样的表层成分和价态进行了分析,发现在注量为5×1016ion/cm2和1×1017ion/cm2的条件下,Nb和Zr在试样表层以Nb2O5和ZrO2的形式存在;而在注量为2×1017ion/cm2的条件下,则以Nb2O5,NbO和ZrO2的形式存在。In order to investigate the effect of the niobium ion implantation on the electrochemical corrosion behavior of zircaloy-4, the potentiodynamic polarization curves of specimens implanted by niobium ions at different doses were measured in acqueous 1N H2SO4. The surface morphology of the specimen after polarization measurement was observed by scanning electricon microscope (SEM). The results indicated that the corrosion resistance of zircaloy-4 could be improved by niobium ion implantation, the improvement being related to the implantation dose. In addition, X-ray photoelectronic spectroscopy (XPS) was employed to analyse the composition and valence of the surface layer. It was found that Nb and. Zr existed on the surface in the form of Nb2O5 and ZrO2 for the implantation doses of 5 x 10(16)ion/cm(2) and 1 x 10(17)ion/cm(2), while in the form of Nb2O5, NbO and ZrO2 for the dose of 2 x 10(17)ion/cm(2).

关 键 词：锆合金 离子注入 电化学腐蚀 耐蚀性 

分 类 号：TG174.444[金属学及工艺—金属表面处理]