Investigation on the preparation and machinability of the B4C/BN nanocomposites by hot-pressing process

Effect of spark plasma sintering parameters on microstructure and room-temperature hardness and toughness of fine-grained boron carbide (B4C)

“…[1][2][3] The combination of these properties makes boron carbide a candidate material for a variety of structural applications. For instance, it is employed as a wear-resistant component for tribological or industrial applications.…”

Anisotropy of elastic properties and thermal conductivity of Al2O3/h-BN composites

“…Such role can be fulfilled by hexagonal boron nitride [11] or CaF 2 , which is used in the alumina composited reinforced by transition metals' borides, nitrides, or carbides [12][13][14]. Lubricants such as hexagonal boron nitride were positively used in case of boron carbide-based composites [15]. The authors noticed a decreased friction coefficient of the sample working with and without cooling agent.…”

Microstructure and mechanical properties of ZTA/BN machinable ceramics fabricated by reactive hot pressing

“…Nano-sized BN particles are homogeneously dispersed in the Al 2 O 3 grains as well as at the grain boundaries, and the strength and the fracture toughness were all improved by the nano-sized BN 19 . Machinable B 4 C/BN composite was prepared via an in-situ hotpressing process by Jiang et al In their work, the strength and fracture toughness of the composite with BN content of 10 wt% and 20 wt% achieved high values that are comparable to or even higher than those of the monolithic B 4 C. 20 A number of other BN containing ceramic composites involving SiAlON/BN, 21 Si 3 N 4 /BN, 22 ZrB 2 /SiC/BN, 23 SiC/BN, 24,25 AlN/BN, 26 and ZrO 2 /BN, 27 have also been prepared by in-situ reactions. Results show that the hardness and elastic modulus of the composites generally decrease with the increase of BN content, which is advantageous for the machinability of the composites.…”