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Enhancing the tensile and ignition response of monolithic magnesium by reinforcing with silica nanoparticulates

机译：通过用二氧化硅纳米颗粒增强来增强整体镁的拉伸和点火响应

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摘要

Low volume fraction (0.5, 1, and 2 vol%) SiO_2 reinforced magnesium nanocomposites were synthesized using powder metallurgy technique followed by hot extrusion. The nanocomposites were studied for physical, microstructural, ignition, and mechanical properties to study the influence of nanoparticulate addition on monolithic magnesium. The grain size of the developed nanocomposites was observed to marginally decrease with the addition of SiO_2 nanoparticulates with 2 vol% SiO_2 addition resulting in a grain size of —23 µm which is —32% lower than that of pure Mg. The ignition temperature of pure Mg was enhanced with the addition of SiO_2 nanoparticulates with Mg 2 vol% SiO_2 nanocomposite exhibiting an ignition temperature of 611 °C (~20 °C greater than pure Mg and AZ31 alloy). Under room temperature tensile loading, Hall-Petch strengthening mechanism was the most dominant wherein the addition of SiO_2 nanoparticulates to pure magnesium enhances the strength within 0-2 vol% range and ductility in 0-1 vol% range.
机译：使用粉末冶金技术然后热挤压合成了低体积分数（0.5、1、2体积％）的SiO_2增强镁纳米复合材料。研究了纳米复合材料的物理，微观结构，着火和机械性能，以研究纳米颗粒添加对整体镁的影响。观察到随着加入SiO_2纳米颗粒和SiO_2的体积分数为2％，已开发的纳米复合材料的晶粒尺寸略有减小，导致晶粒尺寸为-23 µm，比纯Mg尺寸低-32％。通过添加具有2体积％SiO_2纳米复合材料的SiO_2纳米颗粒，可提高纯Mg的着火温度，该SiO_2纳米复合物的着火温度为611°C（比纯Mg和AZ31合金高约20°C）。在室温拉伸载荷下，Hall-Petch增强机制是最主要的，其中在纯镁中添加SiO_2纳米颗粒可提高强度（在0-2％体积范围内）和延展性（在0-1vol％范围内）。

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  • 来源
    《Journal of Materials Research》 |2017年第11期|2169-2178|共10页
  • 作者

    Gururaj Parande; Vyasaraj Manakari; Ganesh Kumar Meenashisundaram; Manoj Gupta;

  • 作者单位

    Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore;

    Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore;

    Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore;

    Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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