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Effective thermoelectric conversion properties of thermoelectric composites containing a crack/hole

机译:含裂纹/孔的热电复合材料的有效热电转换性能

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摘要

Despite the wide applications in engineering of thermoelectric materials, effective thermoelectric conversion behavior of cracked thermoelectric composites has never been investigated so far. To establish the effective properties of a thermoelectric composite, we revisit the general model of a bi-layered thermoelectric composite system with an interfacial crack and study the effect of interfacial cracking on the thermoelectric properties. Through an equivalent principle, the effective thermoelectric properties are given and the influence of applied temperature, crack boundary, crack size, and crack shape are discussed in detail. Generally, a higher effective figure of merit (thermoelectric conversion efficiency) can be obtained in a cracked thermoelectric composite. A significant increase of the effective figure of merit can be observed as the crack size getting larger. In practical engineering, the results in this paper will have a good approximation for cracked thermoelectric composites and can be directly used for design and optimization of thermoelectric devices.
机译:尽管在热电材料工程中得到了广泛的应用,但迄今为止,尚未研究开裂的热电复合材料的有效热电转化性能。为了建立热电复合材料的有效性能,我们重新研究了具有界面裂纹的双层热电复合材料系统的一般模型,并研究了界面裂纹对热电性能的影响。通过等效原理,给出了有效的热电性能,并详细讨论了施加温度,裂纹​​边界,裂纹尺寸和裂纹形状的影响。通常,在裂化的热电复合材料中可以获得较高的有效品质因数(热电转换效率)。随着裂纹尺寸变大,可观察到有效品质因数的显着增加。在实际工程中,本文的结果将对破裂的热电复合材料具有良好的近似性,并可直接用于热电设备的设计和优化。

著录项

  • 来源
    《Composite Structures》 |2018年第5期|180-189|共10页
  • 作者单位

    Harbin Inst Technol, Grad Sch Shenzhen, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Inst Technol, Grad Sch Shenzhen, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Inst Technol, Grad Sch Shenzhen, Harbin 150001, Heilongjiang, Peoples R China;

    Harbin Inst Technol, Grad Sch Shenzhen, Harbin 150001, Heilongjiang, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Thermoelectric materials; Effective thermoelectric properties; Interfacial crack;

    机译:热电材料;有效热电性能;界面裂纹;

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