Electronic and thermal properties of Ti3Al (C0.5, N0.5)2, Ti2Al (C0.5, N 0.5) and Ti2 AlN

T. Scabarozi, A. Ganguly, Jeffrey Hettinger, Samuel Lofland, S. Amini, P. Finkel, T. El-Raghy, M. W. Barsoum

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Abstract

In this paper we report on the electronic, magnetotransport, thermoelectric, and thermal properties of Ti3 Al (C0.5, N0.5) 2, Ti2 Al (C0.5, N0.5), and Ti2 AlN. The electrical conductivities, Hall coefficients, and magnetoresistances are analyzed within a two-band framework and compared with the end members, Ti2 AlC and Ti3 AlC2. The analysis shows that all compounds are compensated conductors with hole and electron carrier densities of about 1.5× 1027 m-3. The room temperature thermal conductivities of the carbonitrides are both over ≈50 W/mK, with the phonon contribution of Ti3 Al (C0.5, N0.5) 2 particularly large at over 35 W/mK. The low-temperature specific heat of Ti3 Al (C0.5, N0.5) 2 and Ti2 Al (C0.5, N0.5) yield Debye temperatures of 685 and 724 K, respectively, comparable to those of the end members.

Original languageEnglish (US)
Article number073713
JournalJournal of Applied Physics
Volume104
Issue number7
DOIs
StatePublished - Oct 22 2008

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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