Friction and Wear of the TiB2–30 vol.% B4C Composite Consolidated in Spark Plasma Sintering

Synthesis and properties of conductive B4C ceramic composites with TiB2 grain network

“…Generally, B 4 C‐TiB 2 composites were prepared via in situ reaction of TiO 2 , carbon and B 4 C, from elemental powders, from TiB 2 and B 4 C, or from TiC and amorphous B powders . Among these reports, the homogeneous dispersion of raw materials was obtained by the ball‐milled method, which was time and energy consuming. This study aims to overcome the 2 disadvantages in B 4 C consolidation by molten‐salt method to form a uniform conductive coating on the surface of B 4 C particles without co‐ball milling.…”

“…Many previous reports have shown that B 4 C-TiB 2 composites have the high fracture toughness, high flexural strength, high hardness, and low electrical resistance 3,[9][10][11][12][13][14] In this regard, TiB 2 can improve the mechanical properties and machinability of B 4 C as a sintering aid. B 4 C-TiB 2 composites were sintered by frequently-used sintering techniques, such as pressureless sintering (PLS), 3,10,11,15 hotpressed sintering (HPS), 1,12 and pulsed electric current sintering (PECS).…”

“…19 As a comparison, near fully dense (97.9%) the B 4 C-41 vol% TiB 2 composite obtained by PECS at 1900°C for 7 minutes under a load of 50 MPa has a Vickers hardness of 28 GPa and a fracture toughness of 4.4 MPaÁm 1/2 . 17 Generally, B 4 C-TiB 2 composites were prepared via in situ reaction of TiO 2 , carbon and B 4 C, 12,16,20,21 from elemental powders, 22 from TiB 2 and B 4 C, 14,23 or from TiC and amorphous B powders. 17 Among these reports, 12,14,16,17,[20][21][22][23] the homogeneous dispersion of raw materials was obtained by the ball-milled method, which was time and energy consuming.…”