Abstract
Transition metal carbides, such as TiC, exhibit very low thermal conductivities (K) at low temperatures. The lattice conductivity at such temperatures is severely limited by phonon scattering by conduction electrons. At high temperatures, point-defect scattering of phonons by carbon vacancies in the non-stoichiometric compounds dominate K. Scattering of electrons by the vacancies limits the electronic contribution. Above ~1000ºC the thermal conductivity of the carbides is increased by ambipolar diffusion.
The thermal conductivity of cemented carbides based on TiC (which is non-stoichiometric) is lower than that of cemented carbides based on WC (which is stoichiometric) at all temperatures. Increasing the content of the binder phase in cemented carbides reduces the thermal conductivity.
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© 1990 Kluwer Academic Publishers
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Williams, W.S. (1990). Thermal Conductivity of Transition Metal Carbides. In: Freer, R. (eds) The Physics and Chemistry of Carbides, Nitrides and Borides. NATO ASI Series, vol 185. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-2101-6_35
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DOI: https://doi.org/10.1007/978-94-009-2101-6_35
Publisher Name: Springer, Dordrecht
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