Effect of electron concentration on electrical conductivity in in situ Al-TiB2 nanocomposites
Open Access
- 5 January 2020
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 116 (1), 014102
- https://doi.org/10.1063/1.5129817
Abstract
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 10-300K 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.Keywords
This publication has 33 references indexed in Scilit:
- Enhanced thermal stability in Cu-40 wt% Zn/WC nanocompositeMaterials & Design, 2019
- Nanoscale Laser Metallurgy and Patterning in Air Using MOFsJournal of the American Chemical Society, 2019
- Study on electrical behaviour of copper and its alloys containing dispersed nanoparticlesCurrent Applied Physics, 2019
- Nanoparticle-enabled phase control for arc welding of unweldable aluminum alloy 7075Nature Communications, 2019
- Facile fabrication and enhanced properties of Cu-40 wt% Zn/WC nanocompositeJournal of Alloys and Compounds, 2019
- Processing, structure and thermal conductivity correlation in carbon fibre reinforced aluminium metal matrix compositesMaterials & Design, 2018
- Time- & Load-Dependence of Triboelectric EffectScientific Reports, 2018
- Nanoparticle-induced unusual melting and solidification behaviours of metalsNature Communications, 2017
- Processing and properties of magnesium containing a dense uniform dispersion of nanoparticlesNature, 2015
- Carbon nanotube reinforced metal matrix composites - a reviewInternational Materials Reviews, 2010