Effect of Heating Schedule on Fabrication of Ti₃SiC₂‐based Composites from Ti–SiC Powder Mixture

Abstract

We herein describe a set of experiments used to study the effect of heating schedule on phase formation during the fabrication of Ti 3 SiC 2 -based materials from Ti-SiC powder mixtures by means of pressureless sintering. We found that combustion was initiated at a temperature of about 1330°C, which resulted in the formation of Ti-rich eutectic melt followed by crystallization of Ti 3 SiC 2 . It was shown that when preannealing was performed at 1150°C, no further combustive process could occur, and an intermediate, nonequilibrium phase composition, consisting of Ti 5 Si 3 C x , TiC, and SiC remained until the end of the heat treatment. We herein discuss the mechanistic interpretation of this behavior.Int. J. Appl. Ceram. Technol., 9 [5] 991-997 (2012)

Cyclic Oxidation of Ternary Layered Ti2AlC at 600–1000°C in Air

“…[1][2][3][4] Similar to metals, they are thermally and electrically conductive, resistant to thermal shock and exhibit plastics at elevated temperatures. [5][6][7][8][9][10][11] Similar to ceramics, they have high-temperature stability, excellent oxidation and hot corrosion resistance as well as low density. [12][13][14][15][16][17][18] Furthermore, MAX phases possess ultralow friction coefficient with ready machinability.…”

“…MAX phases, where M denotes a transition metal, A is an A‐group element (mostly IIIA and IVA), and X is carbon or nitrogen, have attracted numerous interest due to their unusual combination of metallic‐ and ceramic‐like properties . Similar to metals, they are thermally and electrically conductive, resistant to thermal shock and exhibit plastics at elevated temperatures . Similar to ceramics, they have high‐temperature stability, excellent oxidation and hot corrosion resistance as well as low density .…”