添加合金元素Cu和Mn对锆合金中第二相的影响  

Effect of Alloying Element(Cu and Mn) Additions on the Precipitates of Zr Alloys

作　　者：曾奇锋[1] 周邦新[1] 姚美意[1] 彭剑超[1] 夏爽[1] 

机构地区：[1]上海大学材料研究所,上海200072

出　　处：《上海大学学报（自然科学版）》2008年第5期531-536,共6页Journal of Shanghai University:Natural Science Edition

摘　　要：以Zr-4为母合金,分别添加电解纯铜或电解金属锰,用非自耗真空电弧炉熔炼了成分不同的6种锆合金.用透射电子显微镜观察了合金中第二相的形貌,用EDS分析了第二相的成分,用SAD确定了第二相的晶体结构.添加Cu元素的合金中有3种第二相:Zr(Fe,Cr)2粒子、Zr(Fe,Cr,Cu)2粒子和含少量Fe或不含Fe的Zr2Cu粒子;添加Mn元素的合金中只有1种Zr(Fe,Cr,Mn)2第二相,且随着合金中Mn的质量分数从0.07%增加到0.35%,Zr(Fe,Cr,Mn)2粒子中Mn元素的质量分数也升高.A series of zirconium alloys with copper and manganese additions in Zircaloy-4 were prepared using a vacuum non-consumable are melting method. TEM observation was carried out to characterize precipitates in alloys. The crystal structure was determined by a selected area electron diffraction （SAD） pattem, and the composition of precipitates was analyzed with energy dispersion spectroscopy （EDS）. In the copper-added Zircaloy-4 specimens, three main precipitates were detected： （1） Zr （Fe, Cr）2 precipitates, （2） Zr（ Fe, Cr, Cu）2 precipitates, and （3） Zr2Cu precipitates with a bit of Fe or without Fe. In the manganese-added Zircaloy-4 specimens, only one kind of Zr （Fe, Cr, Mn）2 precipitate was observed. Mn content in the precipitates increased as the increase of Mn content from 0.07% to 0.35% in the alloy.

关 键 词：锆合金 合金元素 显微组织 第二相 

分 类 号：TL341[核科学技术—核技术及应用]