Thermal Properties of Various Ti-Al-C Composites Prepared by Hot Shock Compaction Utilizing Combustion Synthesis/ Właściwości Termiczne Kompozytów Ti-Al-C Uzyskanych Z Wykorzystaniem Metody Udarowego Zagęszczania Na Gorąco

Abstract Hot shock compaction method was utilized for the consolidation of MAX phase composites consisting of Ti, Al and C. This paper presents the production of dense, crack-free composites by combining the combustion synthesis with explosive detonation. Another objective is to investigate various properties of the obtained shock-compacts. The shock compacted materials were post-annealed at 1173 K for releasing the shock-induced strain. As a result, these compacts had strong interparticle bonding strength and few macro cracks. Intermetallic compounds (TiAl, Ti 2 Al and Ti 3 Al) and non-oxide ceramics (TiC and Ti 4 Al 2 C 2 ) were detected in as-synthesized and annealed materials by X-ray diffraction experiments. Also, lamella structures of Ti 4 Al 2 C 2 phase were observed by SEM. It was known that the coefficient of thermal expansion increased with increasing temperature, and decreased with increasing TiC content.