Charge and heat transfer of the Ti3AlC2 MAX phase

Abstract

The electrical and thermal conductivity of the sample containing 97% by volume of the Ti3AlC2 MAX phase and 3% volume TiC was experimentally studied in the temperature range 15–300 K. The temperature dependence of the electrical resistance is approximated by a relation that takes into account the scattering of electrons by phonons and defects. The temperature dependence of the thermal conductivity shows a maximum at about 75 K. In the region of elastic scattering of electrons, the phonon and electron heat transfer are separated. With increasing temperature, the fraction of phonon heat transfer decreases from ∼90% at low temperatures to ∼40% near room temperature.