Emissive Power and Specific Electrical Resistivity of Zirconium and Niobium Carbides at High Temperatures
The emissive power and specific electrical resistivity of zirconium and niobium carbides have been investigated in vacuum and in argon at temperatures up to 3300–3500°K. The existence of an “initial” section on the curve for the Et(T) relationship is demonstrated in the case of both carbides. It is suggested that this is due to the oxidized condition of the surface. The deviation of the ρ(T) relationship from a straight line above 2750°K in the case of niobium carbide is attributed to the in congruent evaporation of this carbide.
KeywordsElectrical Resistivity Oxide Film Emission Surface Emissive Power Niobium Carbide
Unable to display preview. Download preview PDF.
- 1.V. S. Neshpor et al., Izv. Akad.Nauk SSSR, Neorg. Mat., 2:855 (1966).Google Scholar
- 2.V. I. Odelevskii, Zh. Tekh. Fiz., 21:678 (1951).Google Scholar
- 3.Yu. B. Paderno, I. G. Barantseva, and V. A. Yupko, in: High-Tempe rature Inorganic Compounds [in Russian], Naukova Dumka, Kiev (1965), p. 199.Google Scholar
- 4.V. A. Petrov, V. Ya. Chekhovskoi, and A. E. Sheindlin, Teplofiz. Vys. Temp., 1:24 (1963).Google Scholar
- 5.V. A. Petrov, V. Ya. Chekhovskoi, and A. E. Sheindlin, in: Electricity from MHD, Proc. Symposium on Magnetohydrodynamic Electrical Power Generation, Salzburg, July 4–8, 1966, Vol. 2, IAEA, Vienna (1966).Google Scholar
- 6.G. V. Samsonov and A.D. Panasyuk, Teplofiz. Vys. Temp., 4:207 (1966).Google Scholar
- 7.V. S. Fomenko, Yu. B. Paderno, and G. V. Samsonov, Ogneupory, No. 1, 40 (1962).Google Scholar
- 10.D. S. Neel and C. D. Pears, “Progress in international research on thermodynamic and transport properties,” Second Symposium on Thermophysical Properties (1952), p. 500.Google Scholar
- 11.T. Riethof, B.D. Accione, and E. R. Branyan, Temperature — Its Measurement and Control in Science and Industry, Vol. 3, 2 (1962), p. 515.Google Scholar