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首页> 外文期刊>Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems >The process and mechanisms for the transformation of coarse grain to nanoscale grain in tungsten by ball milling
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The process and mechanisms for the transformation of coarse grain to nanoscale grain in tungsten by ball milling

机译:球磨用球磨中钨粗晶体转化为纳米级粒的过程和机制

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摘要

Pure tungsten powder with coarse grain was ball milled to obtain nanocrystalline tungsten powder. The morphology and microstructure were characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM) for investigating the process of refinement. Results revealed that the powder grain refinement process in terms of the grain morphology and microstructure includes four stages, and three kinds of grains with different grain size and structure were observed through the deformation of tungsten powder and the interaction and accumulation of dislocations. The minimum grain size of 5 nm of tungsten powder was fabricated. The possible mechanism of nanocrystalline tungsten formation process through ball milling was discussed. (C) 2017 Elsevier B.V. All rights reserved.
机译:具有粗晶粒的纯钨粉是球磨削以获得纳米晶钨粉。 通过X射线衍射(XRD)和透射电子显微镜(TEM)来研究改进过程的形态和微观结构。 结果表明,粉末晶粒细纹和微观结构的细化过程包括四个阶段,通过钨粉的变形和脱位的相互作用和相互作用和积累观察到具有不同晶粒尺寸和结构的三种颗粒。 制造钨粉5nm的最小粒度。 讨论了通过球磨机的纳米晶钨形成过程的可能机制。 (c)2017 Elsevier B.v.保留所有权利。

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