Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering

Recent progress in B4C–SiC composite ceramics: processing, microstructure, and mechanical properties

“…63 Recently, a so-called ultra-high pressure (4 GPa) sintering method has been developed to successfully prepare additive-free B 4 C-SiC ceramics at a low temperature (1500 1C). 64 It is noteworthy that the pressure applied during ultra-high pressure sintering is significantly higher than the pressures applied during HP and SPS, leading to the rapid densification of B 4 C-SiC ceramics. This phenomenon results from the fact that the ultra-high pressure sintering allows the reduction of distance between the grains and endures the improvement of contact between individual grains resulting in plastic deformation.…”

“…Generally, the grain boundary is clean when the ceramics are produced by a solid-state sintering mechanism, 133 whereas the intergranular phase exists at the grain boundary when the sintering mechanism is liquidphase sintering. 134,135 For the phase boundary of B 4 C-SiC ceramics, Matovic ´et al 64 found that there is no amorphous phase or secondary phase at the phase boundary of the ultra-high pressure sintered B 4 C-SiC ceramics without sintering aids. Both Zhang et al 136 and Zhu et al 107 observed that the phase boundary between B 4 C and SiC grains in the pressureless sintered B 4 C-SiC ceramics with the sintering aid of carbon black is clean and clear (Fig.…”

B4C‒TiB2 composite with modified microstructure and enhanced properties from optimal size coupling of raw powders

“…The addition of a second phase is an effective approach to solving the above issues. To enhance the sinterability and mechanical properties of B 4 C ceramic, a variety of sintering additives such as WB 2 , 10 SiC, 11 TiC, 12 carbon nanotube, 13,14 Ti 3 SiC 2 , 15 and TiB 2 , 16–18 are incorporated into B 4 C matrix. Among them, TiB 2 is a promising sintering additive for B 4 C due to its high electrical conductivity, good chemical and thermal stability, high hardness, and moderate density 19,20 .…”

Performance of glucose, sucrose and cellulose as carbonaceous precursors for the synthesis of B4C powders

“…Boron carbide has interesting combination of properties such as high melting point (2445 °C), low density (2.5 g/cm 3 ), high hardness, good resistance against chemical agents, high wear resistance, good modulus of elasticity, high neutron absorption and high impact resistance [1][2][3][4]. This material is widely used in industry and has become one of the most important and strategic engineering ceramics [5][6][7].…”