Abstract
The macrokinetic features of combustion of the mixtures in the Ti-Al-Si3N4-C system calculated for the formation of compact ceramic materials (CCMs), the composition of which is described by the general formula X(TiAl3) + (100 − X)(0.448TiC0.5 + 0.552(Ti5Si3 + 4AlN) with mixture parameter X = 10–50%, are investigated. Compact CCM samples with the main structural components in the form of TiC x N y grains and binding phases TiAl3 and Ti5Si3 are fabricated by the technology of forced self-propagating high-temperature synthesis (SHS) compaction. An increase in X promotes the formation of the M n +1AX n phase with the composition Ti3SiC2 in the synthesis products. Complex investigations into the physicomechanical properties of the obtained ceramics are performed. Based on their results, the inverse dependence of the density and hardness of compact materials on parameter X is established. Tests of the samples for oxidation resistance showed that the obtained CCMs based on titanium carbonitride, silicide, and aluminide possess excellent resistance to high-temperature oxidation, and their oxidation rate in air at t = 900°C for 30 h does not exceed 7.8 × 10−5 g/(m2 s).
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Original Russian Text © E.A. Levashov, Yu.S. Pogozhev, A.S. Rogachev, N.A. Kochetov, D.V. Shtansky, 2010, published in Izvestiya VUZ. Poroshkovaya Metallurgiya i Funktsional’nye Pokrytiya, 2010, No. 3, pp. 26–33.
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Levashov, E.A., Pogozhev, Y.S., Rogachev, A.S. et al. Self-propagating high-temperature synthesis of composite targets based on titanium carbonitride, silicide, and aluminide for ion-plasma deposition of multifunctional coatings. Russ. J. Non-ferrous Metals 53, 77–84 (2012). https://doi.org/10.3103/S1067821212010142
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DOI: https://doi.org/10.3103/S1067821212010142