Microstructures and properties of large bulk solidified TiC–TiB2 composites prepared by combustion synthesis under high gravity

Effect of W content on the compression properties and abrasive wear behavior of the (TiB2–TiCxNy)/(Ni+W) composites

“…TiB 2 -and TiC x N y -(x + y 6 1) based cermets have been promising candidates for cutting tool materials due to the excellent combination of superior mechanical properties, good wear resistance and high hardness [1][2][3][4][5]. Compared with the commonly used WC-Co cemented carbides, they possess better properties, such as superior cutting performance, higher hardness and better oxidation resistance [6][7][8].…”

Microstructure and wear resistance of solidified TiB2-based composites for cutting tools achieved by SHS in high-gravity field

“…Then, presence of full-liquid products after combustion reaction is ensured due to the adiabatic combustion temperature designed as 3500°C which is above melting point of all possible products. Meanwhile, rapid liquid-liquid separation occurs for the full-liquid products consisting of immiscible Al 2 O 3 liquid and Ti-Cr-B-C liquid, which is accelerated in high-gravity field with the presence of density difference [7,8] . According to calculation results of the changes in the Gibbs free energy found in our other paper [8] , formation of the TiB 2 phase directly from the reaction of Ti-Cr-B-C liquid is most favorable and exothermic.…”

“…However, the main disadvantages of SHS process without densification technology are the difficulties to achieve fully dense composites [1] . Recently, a new SHS-densification, SHS in high-gravity field, had been used for preparing highperformance TiC-TiB 2 bulk composites [7,8] . In the present study, the development of advanced TiB 2 -based composites prepared through SHS in high-gravity field is shown.…”

Combustion Synthesis: An Update

“…Furthermore, they showed that a low -gravity environment has an effect on grain formation. XRD results showed that samples produced in both low gravity and 1 g formed an alpha phase of tricalcium [78] phosphate, the high -temperature phase presumably due to exothermic reactions. Spherical pores were produced in low gravity; longitudinal -radial pores were produced in terrestrial gravity.…”

“…There have been a number of ways this ceramic has been tested and evaluated by means of CS with the aid of gravity, most of which have the same results. Finally, Zhao et al have also been conducting research with the ternary Ti -B -C system as well [78] . In their research, they focused mostly on microstructures and properties of large bulk solidifi ed TiC -TiB 2 composites.…”