Microstructure and mechanical behaviour of transient liquid phase spark plasma sintered B4C–SiC–TiB2 composites from a B4C–TiSi2 system

High‐strength TiB2‐B4C composite ceramics sintered by spark plasma sintering

“…Accordingly, B 4 C is widely used in aerospace bulletproof armor plates, neutron absorbers in the nuclear field, and some engineering wear‐resistant parts. Nevertheless, it is hard to prepare pure boron carbide ceramic with high density owing to the existence of low sinterability (due to the B 2 O 3 oxide layer and strong B‐C covalently bond), low self‐diffusivity coefficients, lower plasticity, and lower surface energy, which severely obstruct its broad application to a certain extent 26–33 . Yamada et al 11 .…”

“…Nevertheless, it is hard to prepare pure boron carbide ceramic with high density owing to the existence of low sinterability (due to the B 2 O 3 oxide layer and strong B-C covalently bond), low self-diffusivity coefficients, lower plasticity, and lower surface energy, which severely obstruct its broad application to a certain extent. [26][27][28][29][30][31][32][33] At present, the sintering methods of fabricating ceramics and composite materials mainly include HP, pressureless sintering, SPS, reaction sintering, etc. 7,[36][37][38][39][40] SPS is an innovative sintering technique, which is based on the Joule heating process.…”

Investigation of Microstructural Features and Mechanical Characteristics of the Pressureless Sintered B4C/C(Graphite) Composites and the B4C-SiC-Si Composites Fabricated by the Silicon Infiltration Process

“…While the boron carbide reacted only partially [30][31][32][33][34][35][36][37][38][39][40], the graphite reacted completely with silicon producing silicon carbide [40][41][42][43][44][45][46][47][48][49][50]. The residual boron carbide and silicon existed within the matrix of the composite [40][41][42][43][44][45][46][47][48][49][50] and together with silicon carbide gave rise to the B 4 C-SiC-Si composites [40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55]. The pressureless sintered B 4 C/C(graphite) composites are thus transformed in...…”

“…The residual boron carbide and silicon existed within the matrix of the composite [40][41][42][43][44][45][46][47][48][49][50] and together with silicon carbide gave rise to the B 4 C-SiC-Si composites [40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55]. The pressureless sintered B 4 C/C(graphite) composites are thus transformed into the B 4 C-SiC-Si composites via the silicon infiltration process [40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55]. The microstructural details, phase composition, and mechanical characteristics of the B 4 C/C(graphite) composites as well as B 4 C-SiC-Si composites fabricated by the silicon infiltration process were then investigated and compared.…”

Study on Preparation and Reaction Mechanism of B4C/β-Sialon/SiC/Al2O3 Composite Powder

“…The preparation of composites helps to give full play to the advantages of multicomponent materials [9]. In order to improve the sintering property of B4C, sintering additives such as metals [10], metal oxides [11], transition metal borides [12], and carbides [13] are often introduced to improve the density of point defects or dislocations, so as to achieve the activation effect on grain boundary and volume diffusion and increase the diffusion driving force in the sintering process [14,15]. Yavas et al [16] prepared B4C-CNT composite ceramic containing 3 wt.% CNT by SPS sintering, with hardness of 32.8 GPa and fracture toughness of 5.9 MPa•m 1/2 .…”