Combustion synthesis of Ti(C, N)–TiB2 from a Ti–C–BN system

Influence of applied pressure on the microstructure and properties of Ti(C,N)–TiB₂–Co cermets prepared in situ by reactive hot-pressing

“…2, a sintering pressure of 27 to 44 MPa produced only the desired phases of Co, TiB 2 and Ti(C,N), with no intermediate compounds being identified. This implies that the production of Ti(C,N) TiB 2 Co cermets from the CoTiCBN system is completely feasible, which is consistent with a paper by Zhan et al 8) in which Ti(C,N)TiB 2 Ni cermets were produced by combustion synthesis combined with applied pressure from the NiTiCBN system. However, this earlier study produced brittle NiTi JCS-Japan compounds in the final product, and the density of the sintered bodies was low due to the immediate cooling following combustion synthesis.…”

“…In addition, the high temperature of HP/ HIP often causes coarse grains with micro defects in sintered cermets, which lead to a decrease in grain strength. 7) This has led in recent years to Ti(C,N)TiB 2 ceramics being produced via selfpropagating high-temperature synthesis (SHS) reactions in the TiCBN and TiB 4 CBN systems, but as the resulting products contain a large number of cavities, 8) additional pressure is needed to improve their relative density.…”

Effect of Sintering Temperature on the Microstructure and Properties of Ultra-Fine Ti(C,N)-Based Cermets

“…This explains the shift in the TiN peaks to a lower angle, and so it is believed that Ti(C,N) is synthesized through the solid solution of C into TiN. Indeed, Zhan et al 7) have produced Ti(C,N) and TiB 2 particles by combustion synthesis, and their investigation of the reaction mechanism in the Ti-C-BN system produced similar results. Elevated temperatures will obviously contribute to atomic diffusion and the solid solution of C into TiN, which would be why TiN and residual carbon disappear when the sintering temperature exceeds 1100 C (Fig.…”

“…The most common way to produce Ti(C,N)-TiB 2 ceramics is via a two-step method in which Ti(C,N) and TiB 2 powders are rst mixed, and then sintered to create a powder mixture is then sintered. 4,5) More recently, Yang et al 6) and Zhan et al 7) succeeded in synthesizing Ti(C,N)-TiB 2 composite ceramics through a one-step process of self-propagating high-temperature synthesis (SHS); however, this left a large number of pores in the resulting product. [6][7][8][9] There is, therefore, a need to nd a way of imposing additional pressure in order to improve the relative density of these ceramics.…”

Effects of cobalt on structure and properties of TiC0.3N0.7-TiB2 matrix composite ceramics prepared by self-reactive spray forming method

“…Because of its outstanding physical properties, such as high hardness, high corrosion resistance and high thermodynamic stability, Ti(C, N) (the stoichiometric phase can be expressed as TiC x N y with x + y = 1) matrix materials have been successfully used in cutting tools and wear-resistance materials [1][2][3][4][5]. TiB 2 is the most stable compound of Titanium and Boron, which is covalently bonded and hexagonal close-packed crystal structure.…”