U-2Nb合金热处理后的相结构和成分分析  

Phase and Composition Analysis of the Uranium-2 Weight Percent Niobium Alloy After Heat Treatments

作　　者：陈勇忠[1] 张友寿[1] 柏朝茂[1] 

机构地区：[1]中国工程物理研究院,绵阳621900

出　　处：《核科学与工程》2001年第4期352-355,374,共5页Nuclear Science and Engineering

摘　　要：观察了三种热处理工艺下U 2Nb合金的组织 ,分析了其微观结构和相成分。精确测定了U 2Nb合金中α相和γ相的点阵常数计算出了两相中的Nb含量。在测量中发现 ,机加工后经电解抛光改变了X射线衍射图 ,分析了该异常变化的原因 ,其结果为鉴定USamples of U 2Nb alloy were prepared by arc melting and the resulting structures undergone 3 kinds of thermal treatments examined by scanning electron microscope (SEM) and X ray diffraction(XRD). The niobium concentrations of alpha phase and gamma phase in the U 2Nb alloy were determined from lattice constants. During this study it was found that the main reason which caused changes in the X ray diffraction pattern of the surfaces of the samples before and after electropolishing was not matchining but the preferred etching of α phase of the two phase(α+γ) U 2Nb alloy. So that a new effective method for determination of phases of U 2Nb alloy was established.

关 键 词：热处理 相结构 成分分析 U-2Nb合金 X射线衍射 择优腐蚀 电解抛光 

分 类 号：TL214.4[核科学技术—核燃料循环与材料] TG113[金属学及工艺—物理冶金]