Hot-Press Sintering Densification, Microstructure and Properties of SiC-TiB2/B4C Composites

Bao Xin Zhu; Yu Jun Zhang; Hong Sheng Wang; Chong Hai Wang; Shuang Shuang Yue

doi:10.4028/www.scientific.net/KEM.602-603.488

Paper Titles

Effects of Ball Milling Processing on Solidified TiC-TiB₂ Composites Prepared by Combustion Synthesis in High Gravity Field
p.467

Laminated Composite of Solidified TiC-TiB₂ Ceramic to 1Cr18Ni9Ti Stainless Steel Achieved by Combustion Synthesis in High-Gravity Field
p.473

Microstructures and Properties of Solidified TiC-TiB₂ Composites Prepared by Combustion Synthesis in Enhanced High-Gravity Field
p.479

Microstructures and Crack Propagation in the Joint of Solidified TiC-TiB₂ to Ti-6Al-4V Prepared by Reactive Fusion Bonding in Ultrahigh Gravity Field
p.484

Hot-Press Sintering Densification, Microstructure and Properties of SiC-TiB₂/B₄C Composites
p.488

Microstructure and Properties of MoSi₂-RSiC Composites Prepared by PIP and MoSi₂-Si-Al Alloy Melting Infiltration Composite Process
p.494

Synthesis and Decomposition of Ti₃SiC₂ under 1-5GPa at 1400°C
p.499

Synthesis and Characterization of Ti₃SiC₂ Matrix Multiphase Ceramic
p.503

Friction and Wear of Ti₃SiC₂-Ag/Inconel 718 Tribo-Pair under a Hemisphere-on-Disk Contact
p.507

HomeKey Engineering MaterialsKey Engineering Materials Vols. 602-603Hot-Press Sintering Densification, Microstructure...

Hot-Press Sintering Densification, Microstructure and Properties of SiC-TiB₂/B₄C Composites

Abstract:

SiC-TiB₂/B₄C composites were fabricated by hot-press sintering B₄C with silicon powder and tetrabutyl titanate (precursor of TiO₂) as sintering and reinforcement agents. The influence of additives on hot-press sintering densification, microstructure and properties of composites were studied. The results showed that TiB₂ and SiC generated by chemical reaction between additives and B₄C matrix reinforced the sintering activity of the mixed powders and accelerated significantly the hot-press sintering densification rate of B₄C from 1200 °C to 1700 °C. According to the SEM observation, the second phase of TiB₂ and SiC particles synthetized in situ sited along the grain boundaries of B₄C, meanwhile, those SiC particles of nanoscale size embedded into the B₄C grains, and thereby, intra/inter-type ceramics formed. The maximum relative density of 98.1% was obtained with 9wt.% TiO₂. The typical valus of Vickers hardness, bending strength and fracture toughness can reach 26.7 GPa, 580 MPa and 5.0 MPam^1/2, respectively.

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Periodical:

Key Engineering Materials (Volumes 602-603)

Pages:

488-493

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.602-603.488

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Online since:

March 2014

Authors:

Bao Xin Zhu*, Yu Jun Zhang, Hong Sheng Wang, Chong Hai Wang, Shuang Shuang Yue

Keywords:

Boron Carbide, Hot-Press Sintering Densification, Silicon Carbide (SiC), Titanium Diboride

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