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Characterization of the electromagnetic shielding and compressive behavior of a highly porous titanium foam with spherical pores

机译：具有球形孔的高孔隙度钛泡沫的电磁屏蔽和压缩特性

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摘要

A novel sort of cellular titanium foam with the porosity of 86-90% and the main-pore size of 0.5-3.0 mm was successfully prepared. Such foam exhibited a compressive curve showing three regimes: the initial elasticity, the middle zigzag plateau, and the final "densification." This "densification" presented a course that the broken pieces continually accumulated in those pores which were unbroken or not entirely broken. The fracture morphology suggested that the compressive failure was typically brittle for this titanium foam. The electromagnetic shielding performance was investigated in the radio wave frequency range (0.3-3000 MHz) for this foam, which showed an evident effectiveness with a good performance at low frequencies. On the whole, the effectiveness would be superior while the porosity of the sample was relatively small. It could be inferred that the present foam samples would perform their electromagnetic shielding mainly by the reflection loss mechanism in the low-frequency range, and give priority to the absorption loss mechanism at the upper-frequencies.
机译：成功制备了一种新型的多孔钛泡沫材料，其孔隙率为86-90％，主孔尺寸为0.5-3.0 mm。这种泡沫表现出显示三个状态的压缩曲线：初始弹性，中曲折稳定期和最终“致密化”。这种“致密化”提供了一个过程，即破碎的碎片不断地聚集在未破碎或未完全破碎的孔中。断裂形态表明，这种泡沫钛的压缩破坏通常很脆。在无线电波频率范围（0.3-3000 MHz）中对该泡沫的电磁屏蔽性能进行了研究，结果显示出明显的有效性，并在低频下表现出良好的性能。总体而言，当样品的孔隙率相对较小时，有效性会更高。可以推断出，本发明的泡沫样品将主要通过低频范围内的反射损耗机制来进行电磁屏蔽，而在高频范围内则优先考虑吸收损耗机制。

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  • 来源
    《Journal of Materials Research》 |2015年第22期|3510-3517|共8页
  • 作者

    P.S. Liu; G. Cui;

  • 作者单位

    Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;

    Key Laboratory of Beam Technology and Material Modification of Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, 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);
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  • 正文语种 eng
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