Resistivity and its temperature dependence of nanostructured NiAl at temperatures from 77 to 300 K
- 15 October 1996
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 80 (8) , 4776-4778
- https://doi.org/10.1063/1.363417
Abstract
Direct current resistivity and its temperature dependence for nanostructured NiAl (n-NiAl) was investigated at temperatures from 77 to 300 K. The resistivity of n-NiAl (size 5–6 nm) was higher than that of polycrystalline NiAl and increased with decreasing density. For the n-NiAl with relative density D≳70%, the resistivity decreased with decreasing temperature, manifesting metallic behavior. However, its temperature coefficient of resistivity decreased monotonically with decreasing density, and changed sign from positive to negative at densities 68%–70%, below which it displays on nonmetallic behavior. These results can be well interpreted by dominant grain boundary scattering.This publication has 12 references indexed in Scilit:
- The formation of interfaces in nanocrystalline Ag studied by PLSPhysics Letters A, 1994
- HREM-studies of the microstructure of nanocrystalline palladiumScripta Metallurgica et Materialia, 1990
- Nanocrystalline materialsProgress in Materials Science, 1989
- Structure of nanometer-sized polycrystalline iron investigated by positron lifetime spectroscopyPhysical Review B, 1988
- Electrical conduction in low-resistivity (quasiamorphous)alloysPhysical Review B, 1987
- Mean-free-path concept in polycrystalline metalsPhysical Review B, 1987
- Mean free path and effective density of conduction electrons in polycrystalline metal filmsThin Solid Films, 1984
- Reduced density of effective electrons in metal filmsThin Solid Films, 1982
- Mean free path and density of conductance electrons in platinum determined by the size effect in extremely thin filmsPhysical Review B, 1980
- Electrical conduction in concentrated disordered transition metal alloysPhysica Status Solidi (a), 1973