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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Flaking behavior and microstructure evolution of nickel and copper powder during mechanical milling in liquid environment
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Flaking behavior and microstructure evolution of nickel and copper powder during mechanical milling in liquid environment

机译：液体环境中机械研磨过程中镍和铜粉的剥落行为和微观结构演变

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摘要

To prepare metal flakes with a high flaking level and investigate the microstructure of metal flakes, nickel and copper powder were mechanically milled in liquid environment and the microstructure of powders was investigated by X-ray diffraction. The milling process can be divided into flaking and broken stages. At the flaking stage, milled metal powders exhibited high flaking level and flaky microshape, and < 2 0 0 > became preferred orientation. While at the broken stage, the milled powders presented a low flaking level and irregular microshape, and < 200 > was not preferred orientation any longer. The grain size, microstrain and dislocation density along < 200 > direction varied with milling time differently from that along < 111 > direction. The flaking level of the milled powders was related to the < 200 > preferred orientation, and more closely to the deformation mechanism. We can strengthen the formation of < 200 > preferred orientation to obtain metal powders with a high flaking level.
机译：为了制备高剥落水平的金属薄片并研究金属薄片的微观结构，将镍和铜粉末在液体环境中进行机械研磨，并通过X射线衍射研究粉末的微观结构。研磨过程可分为剥落阶段和破碎阶段。在剥落阶段，研磨的金属粉末表现出高的剥落水平和薄片状的微形，并且<2 0 0>成为优选的取向。在破碎阶段，研磨的粉末呈现出低的剥落水平和不规则的微观形状，并且<200>不再是优选的取向。沿<200>方向的晶粒尺寸，微应变和位错密度随铣削时间的变化与沿<111>方向的晶粒变化不同。研磨粉末的剥落水平与<200>的优选方向有关，并且与变形机理更紧密相关。我们可以加强<200>择优取向的形成，以获得高剥落水平的金属粉末。

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