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首页> 外文期刊>Journal of Materials Engineering and Performance >Comparative Studies on Al-Based Composite Powder Reinforced with Nano Garnet and Multi-wall Carbon Nanotubes
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Comparative Studies on Al-Based Composite Powder Reinforced with Nano Garnet and Multi-wall Carbon Nanotubes

机译：纳米石榴石和多壁碳纳米管增强铝基复合粉末的比较研究

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摘要

Effect of mechanical alloying/milling on microstructural evolution and hardness variations of garnet and multi-walled carbon nanotubes (MWCNTs)-reinforced Al-Mg-Si alloy (EN AW6082) composites are investigated. Structural and morphological studies revealed that the composite powders prepared by milling display a more homogenous distribution of the reinforcing particles. Improved nanoindentation hardness viz., 4.24 and 5.90 GPa are achieved for EN AW6082/Garnet and EN AW6082/MWCNTs composites, respectively, and it is attributed to severe deformation of the aluminum alloy powders and embedding of the harder reinforcement particles uniformly into the aluminum alloy matrix. However, enhancement in case of MWCNTs-reinforced composite makes apparent the effect of its nanosized uniform dispersion in the matrix, thereby resisting the plastic deformation at lower stress and increased dislocation density evolved during high-energy ball milling. The results of the present study indicate that carbon nanotubes and garnet can be effectively used as reinforcements for Al-based composites.
机译：研究了机械合金化/铣削对石榴石和多壁碳纳米管（MWCNTs）增强的Al-Mg-Si合金（EN AW6082）复合材料的微观组织演变和硬度变化的影响。结构和形态研究表明，通过研磨制备的复合粉末显示出增强颗粒的分布更加均匀。 EN AW6082 /石榴石和EN AW6082 / MWCNTs复合材料的纳米压痕硬度分别提高了4.24和5.90 GPa，这归因于铝合金粉末的严重变形以及较硬的增强颗粒均匀地嵌入铝合金中矩阵。但是，在MWCNTs增强的复合材料的情况下进行增强可以明显看出其纳米尺寸均匀分散在基体中的效果，从而在较低的应力下抵抗塑性变形，并在高能球磨过程中抵抗位错密度的增加。本研究结果表明，碳纳米管和石榴石可以有效地用作铝基复合材料的增强材料。

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