Effect of nickel additions on the oxidation kinetics of double titanium and chromium carbide powder

The effect of powdered nickel additions (10–33 mass %) on the oxidation kinetics of double titanium-chromium carbide produced by the method of self-propagating high-temperature synthesis, and also that of plating the synthesized carbide powder with nickel (26 mass %) was studied. The effect of nickel concentration and powder particle size on the oxidation resistance at different temperatures was different. However, it can be stated that plating the carbide powder with nickel increased its oxidation resistance at all temperatures in the range 600–1000°C, excepting 700°C. The degree of oxidation of the carbide and nickel constituents were estimated. Activation energies for the initial and parabolic stages of oxidation were determined. Translated from Poroshkovaya Metallurgiya. Nos. 1/2(411), pp. 76–82, January–February, 2000.