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首页> 外文期刊>Materials Science and Engineering >A novel graphene-stimulated semi-solid processing to fabricate advanced aluminium matrix nanocomposites
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A novel graphene-stimulated semi-solid processing to fabricate advanced aluminium matrix nanocomposites

机译：一种新颖的石墨烯刺激的半固体加工工艺，以制备高级铝基纳米复合材料

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摘要

This study reveals an unprecedented capacity of flake graphene sheets in manipulating semi-solid deformation of aluminium matrix nanocomposites by restricting the grain growth of the nanograins during the reheating process to significantly enhance (173%) the yield strength of the fabricated composites. The graphene sheets with onion shape have also shown the unique capability in alleviating the agglomeration of SiC nanoparticles, attributed to the manipulated Hamaker constant of these particles as a result of wrapping graphene sheets. A devised mathematical approach has authenticated, for the first time, the effect of wrapping graphene sheets on subtle adjusting the Hamaker constant of SiC nanoparticles to stimulate engulfment of these nanoparticles within solidifying matrix rather than agglomeration at grain boundaries. This, therefore, has resulted in diminishing the porosity and stimulating multi-scaled microano grains, thereby significantly enhancing the tensile properties of the fabricated composites.
机译：这项研究揭示了鳞片状石墨烯片材在限制铝基纳米复合材料在再加热过程中的晶粒长大以显着提高（173％）制成的复合材料的屈服强度，以控制铝基纳米复合材料的半固态变形的空前能力。具有洋葱形状的石墨烯片材还显示出了减轻SiC纳米颗粒团聚的独特能力，这归因于包裹石墨烯片材后这些颗粒的受控Hamaker常数。设计的数学方法首次验证了包裹石墨烯片对微调SiC纳米颗粒的Hamaker常数以刺激这些纳米颗粒在凝固基质中的吞噬而不是在晶界聚集的效果。因此，这导致孔隙率减小并刺激了多尺度的微米/纳米晶粒，从而显着增强了所制造复合材料的拉伸性能。

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