Densification and Mechanical Properties of B4C Based Composites Sintered by Reaction Hot-Pressing

Guo Feng Wang; Ji Hong Zhang; Chunping Zhang; Kai Feng Zhang

doi:10.4028/www.scientific.net/KEM.434-435.24

Paper Titles

Large Bulk Al₂O₃/ZrO₂ (Y₂O₃) Nanocrystalline Composites Prepared by Combustion Synthesis under High Gravity
p.9

Ultra-High-Hard Composites of TiC-TiB₂ Prepared by Combustion Synthesis under High Gravity
p.13

A Study on the Porous Microstructure of Yakbone Bioceramic
p.17

Effect of Microstructure on Removal Mechanism of Solid State Sintered Silicon Carbide in Polishing Procedure
p.21

Densification and Mechanical Properties of B₄C Based Composites Sintered by Reaction Hot-Pressing
p.24

Mechanical and Tribological Properties of 3D Carbon Fiber Reinforced SiC Composites Prepared by Liquid Silicon Infiltration
p.28

Structure and Performance of Self-Reactive Spray Formed Ti(C,N)-TiB₂ Multi-Phased Ceramic Materials
p.33

Microstructure and Performance of the Hot-Pressed Silicon Nitride Ceramics with Lu₂O₃ Additives
p.37

Effects of CeO₂ on the Mechanical Property and Microstructure of 3Y-TZP Nanocomposite Ceramic Die Material
p.42

HomeKey Engineering MaterialsKey Engineering Materials Vols. 434-435Densification and Mechanical Properties of B4C...

Densification and Mechanical Properties of B₄C Based Composites Sintered by Reaction Hot-Pressing

Abstract:

Boron carbide (B4C) possesses unique physical and thermal properties. In this paper, B4C based composites toughened by TiB2 were fabricated by in-situ reaction sintering with the original microcrystalline powders B4C, TiO2 and glucose. The influences of sintering temperature and content of TiO2 on the sintering behavior and mechanical properties were investigated. (TiB2, Al2O3)/B4C and (TiB2,SiC)/B4C composites with almost fully dense were fabricated by using additives　of Al2O3 and Si powders and sintering at 1950°C and 1900°C, the fracture toughness of composites reach to 7.09 and 6.35 MPa•m1/2 respectively. The analysis of microstructure shows that the main toughen mechanism is the crack deflection due to the existence of residual stress.