Rietveld法模拟测算稀土双相永磁合金中物相的含量  

Phase Content in Rare Earth Two Phase Magnets Determined by Rietveld Method

作　　者：王宁[1] 张久兴[1] 岳明[1] 王超群[2] 

机构地区：[1]北京工业大学材料学院,北京100022 [2]北京有色金属研究总院,北京100088

出　　处：《稀有金属》2004年第2期326-329,共4页Chinese Journal of Rare Metals

基　　金：国家自然科学基金资助项目 (5 0 2 0 10 0 1)

摘　　要：用Rietveld法模拟计算稀土双相永磁合金Nd2 Fe1 4B/α Fe的X射线衍射谱 (XRD) ,并根据多相体模型与无标定量相分析法确定各物相的含量。此外 ,通过结构精修也可以进一步提取诸如纳米晶尺寸等微结构信息。对一组快淬Nd2 Fe1 4B合金经 70 0℃和不同时间退火 (晶化处理 )的样品进行α Fe含量的测定结果表明 ,实测结果与实际工艺相吻合。该法可以推广应用于其他稀土双相永磁合金如Pr2 Fe1 4B/α Fe(或Fe3B)的相含量测定与微结构分析。The X-ray diffraction (XRD) patterns were calculated analogically by using Rietveld method and the phase content was determined based on standardless quantitative phase analysis in rare earth two phase Nd 2Fe 14B/α-Fe magnet. In addition, the microstructural messages as nanosize can be extracted by the Rietveld structure refinement. The results show that the analogically calculated α-Fe content and experimental result consist with practice technological process. This analytical technique can be recommended in the phase content and microstructural analysis of another rare earth two phase magnets.

关 键 词：无标定量分析 Rietveld法 稀土双相永磁合金 

分 类 号：TM273[一般工业技术—材料科学与工程]