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首页> 外文会议>International Symposium on Metastable and Nano-Materials(ISMANAM-2005); 20050703-07; Paris(FR) >Comparative study of NiW, NiMo and MoW prepared by mechanical alloying
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Comparative study of NiW, NiMo and MoW prepared by mechanical alloying

机译：机械合金化制备NiW，NiMo和MoW的比较研究

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摘要

The present work concern the amorphisation process induced by mechanical alloying in the NiW, NiMo and MoW systems. The alloys chosen combine a group of transition elements varying from very similar atomic radius and electronic valences (MoW) to different ones (NiW and NiMo). The three systems achieved an amorphous state after 50 h of milling. The mechanism of amorphisation proposed for NiW and NiMo was the combined effect of an excess concentration of the solute atoms entering into the structure of one of the elements and a critical concentration of defects. Continuous formation of an amorphous phase at the interface of the crystalline phase was observed during the process. MoW seems to amorphize by continuous reduction of grain size down to a critical value where the amorphisation takes place.mechanical alloying; amorphisation; scanning and transmission electron microscopy; x-ray diffraction
机译：本工作涉及在NiW，NiMo和MoW系统中由机械合金化引起的非晶化过程。选择的合金结合了一组过渡元素，从非常相似的原子半径和电子化合价（MoW）到不同的过渡价（NiW和NiMo）。这三个系统在研磨50小时后达到非晶态。针对NiW和NiMo提出的非晶化机制是过量溶质原子进入一种元素的结构以及临界浓度缺陷的综合作用。在该过程中观察到在结晶相界面上连续形成非晶相。 MoW似乎通过将晶粒尺寸连续减小到发生非晶化的临界值而非晶化。非晶化扫描和透射电子显微镜X射线衍射

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