Resistivity increment by solute vanadium in aluminum
The contribution per unit concentration of solute vanadium to electrical resistivity of solid aluminum, Δρ<sup><i>V</i></sup>, and its temperature dependence were measured using high purity Al–V binary alloys. Δρ<sup><i>V</i></sup> at 77 K and 300 K are 37.6 and 37.0 nΩm·mass%<sup>−1</sup>, respectively, showing a small negative DMR (deviation from the Matthiessen's rule). After a prolonged heat treatment at 923 K, the decrease in the actual size factor due to oxidation of the specimen surface was observed. In the heat treatment temperature-resistivity (<i>T<sub>H</sub></i>–ρ) diagram, the resistivity of Al–V binary alloy calculated from reported equilibrium solubility values locates between those of Al–Ti and Al–Zr alloys. Since the large Δρ and very small diffusivity in aluminum, the vanadium content should be especially restricted in manufacturing or recycling processes of aluminum conductor alloys.
軽金属 49(10), 476-480, 1999-10-30
The Japan Institute of Light Metals