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Low-density expanded perlite-aluminium syntactic foam

机译：低密度膨胀珍珠岩铝复合泡沫

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摘要

This paper addresses an innovative syntactic foam (SF) formed by counter-gravity infiltration of a packed bed of low-cost expanded perlite (EP) particles with molten A356 aluminium. The uniform distribution of EP particles in foams causes an even density throughout the height. Due to the low density (～0.18 g/cm~3) of EP, the average density of these foams is only 1.05 g/cm~3 which is considerably lower than most studied SFs. Owing to the high porosity of the filler material (～94%), the total porosity of the new foam reaches 61%. Microstructural observations reveal no sign of damage or unintended EP particle infiltration. EP shows a good wettability whilst essentially no reaction occurs at the EP-metal interface. Under compression, EP/A356 syntactic foam shows stress-strain curves consisting of elastic, plateau and densification regions. On account of its consistent plateau stress (average value 30.8 MPa), large densification strain (almost 60%), and high energy absorption efficiency (88%) EP/A356 syntactic foam is an effective energy absorber.
机译：本文探讨了一种创新的复合泡沫塑料（SF），该泡沫塑料是通过对重力膨胀的低成本膨胀珍珠岩（EP）颗粒填充床和熔融A356铝的反重力渗透而形成的。 EP颗粒在泡沫中的均匀分布导致整个高度的密度均匀。由于EP的低密度（〜0.18 g / cm〜3），这些泡沫的平均密度仅为1.05 g / cm〜3，远低于大多数研究的SFs。由于填充材料的高孔隙率（约94％），新泡沫的总孔隙率达到61％。微观结构观察未发现损坏或EP颗粒意外渗入的迹象。 EP显示出良好的润湿性，而在EP-金属界面上基本上没有反应发生。在压缩下，EP / A356句法泡沫显示出应力-应变曲线，该曲线由弹性，平稳和致密化区域组成。由于其稳定的平台应力（平均值30.8 MPa），较大的致密应变（几乎60％）和较高的能量吸收效率（88％），EP / A356复合泡沫是一种有效的能量吸收剂。

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  • 来源
    《Materials Science and Engineering》 |2014年第16期|127-134|共8页
  • 作者

    M. Taherishargh; I.V. Belova; G.E. Murch; T. Fiedler;

  • 作者单位

    Centre for Mass and Thermal Transport in Engineering Materials, Discipline of Mechanical Engineering, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia;

    Centre for Mass and Thermal Transport in Engineering Materials, Discipline of Mechanical Engineering, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia;

    Centre for Mass and Thermal Transport in Engineering Materials, Discipline of Mechanical Engineering, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia;

    Centre for Mass and Thermal Transport in Engineering Materials, Discipline of Mechanical Engineering, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Syntactic foam; Expanded perlite; Infiltration; Mechanical characterization; Electron microscopy;

    机译：句法泡沫;膨胀珍珠岩;浸润;机械特性电子显微镜;

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