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.
Highlights
Synthesizing and studying new functional materials that can be employed in multiple technological applications [1,2,3,4,5] is a key direction of solid state physics
One of the most promising classes of such compounds are the so-called MAX phases [1,2,3]
In the present study we have investigated the thermal and electrical conductivity of the T i3AlC2 MAX phase in the temperature range of 15–300 K
Summary
Synthesizing and studying new functional materials that can be employed in multiple technological applications [1,2,3,4,5] is a key direction of solid state physics. One of the most promising classes of such compounds are the so-called MAX phases [1,2,3] (with the general formula Mn+1AXn, where M is the transition material, A is the element of the III- or IV-subgroup of the periodic system, and X is carbon or nitrogen). V.N. Karazin Kharkiv National University, 4 Svoboda sq., Kharkiv 61022, Ukraine. Ukrainian State University of Railway Transport, 7 Feuerbach sq., Kharkiv 61050, Ukraine. V. Bakul Institute for Superhard Materials of the National Academy of Sciences of Ukraine, 2 Avtozavodska St., Kyiv 04074, Ukraine
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