中文摘要：

采用液-液掺杂工艺制得稀土掺杂钼粉及钼（合金）坯,通过调整掺杂稀土的种类及含量考察了其对钼粉及钼（合金）坯组织及性能的影响,结果表明,掺杂稀土的种类和掺杂含量的变化对Mo-La-Y复合粉体的形貌及尺寸的影响不明显;钼（合金）坯基体颗粒总体上随掺杂含量的增加而变细,而在相同掺杂含量下,双元掺杂比单元掺杂的细化作用更明显;增加稀土掺杂含量或采用双元复合掺杂均有利于提高掺杂钼（合金）坯的硬度。

英文摘要：

Mo Products（powders and blank）doped with rare earth were prepared using liquid-liquid doping technique.The effects of variety and concentration of rare earth dopants on structrures and properties of the Mo products have been investigated.The results showed the effects of changing variety and concentration of rare earth dopants on size and morphology of Mo-La-Y composite powders were not distinct.On the whole,the particle size of Mo blank base decreases with the increasing of rare earth dopant,the refining effect is more obvious in two rare earth elements than in a single element under the same doping concentration;the hardness of Mo blank can be improved when increasing the dopant of rare earth or adopting multi-doped with two rare earth elements.