Densification of high-strength B4C–TiB2 composites fabricated by pulsed electric current sintering of TiC–B mixture. (1st July 2017)

• Record Type: Journal Article
• Authors: Liu, Zetan; Wang, Dewen; Li, Jiamao; Huang, Qing; Ran, Songlin
• Is Part Of: Scripta materialia. Number 135(2017)
• Page Start: 15
• Page End: 18
• Publication Date: 2017-07-01
• Subjects: Boron carbide (B4C) -- Titanium diboride (TiB2) -- Reactive pulsed electric current sintering -- Mechanical properties; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.03.023
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The densification and mechanical properties of B4 C–TiB2 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 B4 C–41 vol% TiB2 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. Graphical abstract: