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Abstract The densification and mechanical properties of B 4 C–TiB 2 composites fabricated by reactive pulsed electric current sintering from a mixture of TiC and amorphous B powders were investigated.… Click to show full abstract
Abstract The densification and mechanical properties of B 4 C–TiB 2 composites fabricated by reactive pulsed electric current sintering from a mixture of TiC and amorphous B powders were investigated. The excess of B was essential to remove the carbon produced by the reaction. The degassing process at 1900 °C before applying a 50 MPa external pressure greatly improved the densification of the composites. The B 4 C–41 vol% TiB 2 composite obtained at the optimum condition had a high 3-point bending strength of 891 MPa, a Vickers hardness of 28 GPa and a fracture toughness of 4.4 MPa m 1/2 , respectively.
Journal Title: Scripta Materialia
Year Published: 2017
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