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Mechanical properties and damping properties of carbon nanotube-reinforced foam aluminum with small aperture

机译：小孔径碳纳米管增强泡沫铝的机械性能及阻尼性能

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摘要

In this paper, CNTs reinforced foam aluminum matrix composites with small pore diameter were prepared by powder metallurgy method. When the mass fraction of CNTs was 0.75%, the tensile strength, flexural strength and compressive yield strength of the materials were 3.4 times, 2.4 times and 2.4 times of pure foam aluminum, respectively, reaching the maximum value, which obviously improved the mechanical properties of aluminum foam. The tensile property model of foam aluminum matrix composites was built to predict the properties of the composites, and the effects of defects and reinforcement on the mechanical properties of the composites were compared. The results show that the tensile fitting is consistent with the measured results when the mass fraction of CNTs is less than 0.75%, but the weakening effect of defects on the strength of aluminum foam is much greater than the enhancement of CNTs. With the increase of CNTs mass fraction, the damping loss factor of foam aluminum composites increases, dislocation damping and grain boundary damping play a role in advance, and the damping peak moves to the low temperature region.
机译：本文采用粉末冶金方法制备具有小孔径的CNTS增强泡沫铝基基复合材料。当CNT的质量分数为0.75％时，材料的拉伸强度，抗弯强度和压缩屈服强度分别为纯泡沫铝的最大值分别为3.4倍，2.4倍和2.4倍，明显改善了机械性能铝泡沫。构建了泡沫铝基复合材料的拉伸性能模型以预测复合材料的性质，比较缺陷和增强对复合材料的力学性能的影响。结果表明，当CNT的质量分数小于0.75％时，拉伸配件与测量结果一致，但缺陷对铝泡沫强度的弱化效果远大于CNT的增强。随着CNTS质量分数的增加，泡沫铝复合材料的阻尼损耗因子增加，脱位阻尼和晶界阻尼在预先发挥作用，并且阻尼峰值移动到低温区域。

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  • 来源
    《Journal of Materials Research》 |2020年第19期|2567-2574|共8页
  • 作者

    Mingying Chen; Bowen Liu; Zhen Ji; Chengchang Jia; Qiuchi Wu; Zhe Liu;

  • 作者单位

    School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China;

    Institute of Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China;

    School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China;

    Institute of Advanced Materials and Technology University of Science and Technology Beijing Beijing 100083 China;

    School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China;

    School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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