Effect of Mo on microstructure and mechanical properties of TiC—Ni-based cermets produced by combustion synthesis—impact forging technique

Microstructure and kinetics of a functionally graded NiTi–TiCx composite produced by combustion synthesis

“…The reaction was controlled by a dissolution-precipitation mechanism [19,20] with an apparent activation energy of 124 kJ mol −1 for combustion temperatures greater than 2438 • C (2711 K), while the reaction was controlled by diffusion of carbon through a solid TiC layer with an apparent activation energy of 364 kJ mol −1 for combustion temperatures less than 2438 • C. The apparent activation energy was slightly raised corresponding to dissolution of carbon into the intermetallic melt for an additional melting reactant added to the Ti + C system, such as nickel [21]. The melting point of TiC x decreases with decreasing x as observed in the Ti-C phase diagram [22].…”

The Influence of Ni Addition on the Microstructures and Mechanical Properties of Al2O3–TiN–TiC Ceramic Materials

“…Konopka et al [26] found that the fracture toughness of ceramic materials was excellent as the result of the interactions between the Mo particles and the crack, such as surrounding of a particle by the crack and passing through a particle. Another important beneficial effect of Mo is due to improving the wettability of the Ni binder on the carbide phase [27][28][29][30]. Improved wettability results in a decrease in detrimental microstructural defects and an increase in the interphase bond strength and phase uniformity.…”

The effects of Mo2C additions on the microstructure and sliding wear of TiC0.3N0.7–Ni3Al cermets

“…One approach used to reduce the poor wettability of Ti(C,N) ceramics is through additions of Mo, in either its elemental or carbide form, as Mo 2 C [5][6][7]. Improved wetting results in a reduction of microstructural defects, such as voids and micro-cracks, an increase in the interphase bond strength, and also improved phase homogeneity [8].…”