Interaction of Graphite with a Ti–Al Melt during Self-Propagating High-Temperature Synthesis

• Published in: Inorganic materials Vol. 55; no. 8; pp. 780 - 784
• Main Authors: Sychev, A. E., Busurina, M. L., Sachkova, N. V., Vrel, D.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.08.2019; Springer Nature B.V; MAIK Nauka/Interperiodica
• Subjects: Aluminum; Carbon; Chemistry; Chemistry and Materials Science; Combustion products; Engineering Sciences; Graphite; High temperature; Industrial Chemistry/Chemical Engineering; Inorganic Chemistry; Materials; Materials Science; Self propagating high temperature synthesis; Titanium carbide; X-ray diffraction; self-propagating high-temperature synthesis; intermetallics; structure formation; Ti–Al–C
• ISSN: 0020-1685; 1608-3172
• DOI: 10.1134/S002016851908017X

— We have studied in detail the structuring of combustion products in the Ti–Al–C system at low carbon concentrations (96 wt % (Ti + Al) + 4 wt % graphite) prepared by self-propagating high-temperature synthesis and compared the results to those for carbon-free samples prepared by the same method. A thin (~500 nm) TiC carbide layer has been shown to be formed on the surface of unreacted graphite particles, followed by the growth of the Ti 2 AlC MAX phase, which has a laminate structure. The presence of the Ti 2 AlC phase in the synthesized samples has been confirmed by X-ray diffraction and energy dispersive analysis. TiC has not been detected by X-ray diffraction, presumably because it is present in a small amount.