Effect of grain size on low-temperature electrical resistivity and thermal conductivity of pure magnesium

摘要

The electrical resistivity and thermal conductivity of as-cast pure Mg with different grain sizes prepared by ultrasonic treatment were measured in the temperature range of 2-320 K. The grain size has little effect on residual electrical resistivity, but the different samples exhibit different temperature coefficients of resistance. The maximum of thermal conductivity 665 W/(m.K) appears at similar to 20 K where the different grain sizes shows the biggest difference. Less effect of grain size on the thermal conductivity can be observed at room temperature. (C) 2018 Elsevier B.V. All rights reserved.