机构地区: 上海大学
出 处: 《原子能科学技术》 2007年第6期711-715,共5页
摘 要: 将Zr-Sn-Nb新锆合金样品分别进行多种变形热处理,用透射电子显微镜研究它们的显微组织和第二相粒子。然后,将它们放入高压釜中,在350℃、16.8 MPa、含70μg/g Li+的LiOH水溶液中腐蚀。结果表明:580℃-3 h/冷轧/500℃-30 h处理的样品具有最好的耐腐蚀性能,这归因于该样品中Zr-Nb-Fe第二相粒子细小分布均匀、第二相粒子体积分数最高,从而导致基体中的Nb元素固溶含量最低。 After being treated in different ways, Zr-Sn-Nb zirconium alloy specimens were exposed in 70 μg/g Li^+ LiOH aqueous solution at 350 ℃ and 16. 8 MPa. The microstructures and second phase particles of these specimens were observed by transmission electron microscope (TEM). The specimens treated by 580 ℃/C. R/500 ℃ show best corrosion resistance among all the specimens. TEM observation shows that a large number of second phase particles exist in the specimen, which are fine and dispersed homogeneously, result in the lowest Nb content in the matrix.
领 域: [核科学技术]