Synthesis of the Ti2AlC MAX Phase with a Reduction Step via Combustion of a TiO2 + Mg + Al + C Mixture
- Authors: Vershinnikov V.I.1, Kovalev D.Y.1
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Affiliations:
- Merzhanov Institute of Structural Macrokinetics and Materials Science
- Issue: Vol 54, No 9 (2018)
- Pages: 949-952
- Section: Article
- URL: https://journals.rcsi.science/0020-1685/article/view/158528
- DOI: https://doi.org/10.1134/S0020168518090170
- ID: 158528
Cite item
Abstract
Technologically viable principles have been developed for the preparation of the MAX phase Ti2AlC by self-propagating high-temperature synthesis (SHS) with a reduction step, using titanium dioxide. We have studied the influence of synthesis conditions (starting-mixture composition and ratio of reactants) on the composition, structure, and particle size of Ti2AlC powders. The results demonstrate that an excess of magnesium in the starting mixture leads to a decrease in the percentage of MgAl2O4 (spinel), and carbon deficiency in the starting mixture reduces the percentage of titanium carbide in the final product. The Ti2AlC powders prepared by SHS consist of agglomerates of layered particles differing in size: from coarse (several microns) to ultrafine and nanometer-sized particles. The composition of the powders was confirmed by chemical analysis, microstructural examination, and X-ray diffraction.
About the authors
V. I. Vershinnikov
Merzhanov Institute of Structural Macrokinetics and Materials Science
Author for correspondence.
Email: vervi@ism.ac.ru
Russian Federation, ul. Akademika Osip’yana 8, Chernogolovka, Moscow oblast, 142432
D. Yu. Kovalev
Merzhanov Institute of Structural Macrokinetics and Materials Science
Email: vervi@ism.ac.ru
Russian Federation, ul. Akademika Osip’yana 8, Chernogolovka, Moscow oblast, 142432
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