Electrical conductivity is important for the applications of metals containing nanoparticles, and a thorough understanding of how nanoparticles affect their electrical conductivity is much needed. In this paper, an in situ Al-TiB2 nanocomposite is used as a model system to study its electrical behavior from 10–300 K with Hall scanning up to ± 6 T. By experimentally identifying the respective contributions from the nanoparticle size, grain boundaries, dislocation density, and nanoparticle volume percentage, it suggests that a low volume percent of TiB2 nanoparticles can reduce the electron concentration significantly to decrease the electrical conductivity of the Al-TiB2 nanocomposites, while yielding less effect on the electron mobility. Moreover, the results show that the intrinsically enhanced electron-phonon interaction and the interfacial bound states by TiB2 nanoparticles play a role in lowering the electron concentration. This understanding of how nanoparticles affect the electrical conductivity provides useful insights into the rational design and optimization of metal matrix nanocomposites for numerous applications.Electrical conductivity is important for the applications of metals containing nanoparticles, and a thorough understanding of how nanoparticles affect their electrical conductivity is much needed. In this paper, an in situ Al-TiB2 nanocomposite is used as a model system to study its electrical behavior from 10–300 K with Hall scanning up to ± 6 T. By experimentally identifying the respective contributions from the nanoparticle size, grain boundaries, dislocation density, and nanoparticle volume percentage, it suggests that a low volume percent of TiB2 nanoparticles can reduce the electron concentration significantly to decrease the electrical conductivity of the Al-TiB2 nanocomposites, while yielding less effect on the electron mobility. Moreover, the results show that the intrinsically enhanced electron-phonon interaction and the interfacial bound states by TiB2 nanoparticles play a role in lowering the electron concentration. This understanding of how nanoparticles affect the electrical conductivity...

中文翻译：

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原位Al-TiB2纳米复合材料中电子浓度对电导率的影响

导电性对于含有纳米颗粒的金属的应用很重要，并且非常需要彻底了解纳米颗粒如何影响其导电性。在本文中，原位 Al-TiB2 纳米复合材料用作模型系统，研究其在 10-300 K 范围内的电学行为，霍尔扫描高达 ± 6 T。通过实验确定纳米颗粒尺寸、晶界、位错密度和纳米颗粒体积百分比，这表明低体积百分比的 TiB2 纳米颗粒可以显着降低电子浓度，从而降低 Al-TiB2 纳米复合材料的电导率，同时对电子迁移率的影响较小。而且，结果表明，TiB2 纳米颗粒固有的增强的电子-声子相互作用和界面束缚态在降低电子浓度方面发挥了作用。对纳米粒子如何影响电导率的理解为合理设计和优化金属基纳米复合材料的众多应用提供了有用的见解。 电导率对于含有纳米粒子的金属的应用很重要，而对纳米粒子如何影响其导电性的透彻理解是非常需要。在本文中，原位 Al-TiB2 纳米复合材料用作模型系统，研究其在 10-300 K 范围内的电学行为，霍尔扫描高达 ± 6 T。通过实验确定纳米颗粒尺寸、晶界、位错密度，和纳米颗粒体积百分比，这表明低体积百分比的 TiB2 纳米颗粒可以显着降低电子浓度，从而降低 Al-TiB2 纳米复合材料的电导率，同时对电子迁移率的影响较小。此外，结果表明 TiB2 纳米粒子固有的增强的电子 - 声子相互作用和界面束缚态在降低电子浓度方面起作用。这种对纳米粒子如何影响电导率的理解...... 结果表明，TiB2 纳米颗粒固有的增强的电子-声子相互作用和界面束缚态在降低电子浓度方面发挥了作用。这种对纳米粒子如何影响电导率的理解...... 结果表明，TiB2 纳米颗粒固有的增强的电子-声子相互作用和界面束缚态在降低电子浓度方面发挥了作用。这种对纳米粒子如何影响电导率的理解......