Preparation of TiB2–SiC composites toughened with interlocking microstructure by self-assembled TiB2 plates

The spark plasma sintering (SPS) technique was found to effectively improve the mechanical properties of TiB2–SiC ceramic by forming a unique interlocking structure. This study investigated the phase transition process of the hexagonal micro-platelets TiB2 powders with self-assembled structure durin...

Full description

Saved in:
Bibliographic Details
Published in:Ceramics international 2022-02, Vol.48 (4), p.5119-5129
Main Authors: Li, Xingchao, Zhang, Tong, Chen, Chen, Song, Shaolei, Shen, Sunyi, He, Guanzhong, Li, Zheng, Li, Rong, Zhen, Qiang, Bashir, Sajid, Liu, Jingbo Louise
Format: Article
Language:English
Subjects:
Fracture resistance
Interlocking structure
Self-assembled TiB2 plates
Ultra-high temperature ceramics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The spark plasma sintering (SPS) technique was found to effectively improve the mechanical properties of TiB2–SiC ceramic by forming a unique interlocking structure. This study investigated the phase transition process of the hexagonal micro-platelets TiB2 powders with self-assembled structure during the molten-salt-mediated carbothermal reduction and its effect on promoting the mechanical properties of TiB2-based ceramics. It was found that the SPS approach ensured a highly densified TiB2–SiC ceramics with enhanced Vickers hardness of 21.0 ± 1.3 GPa and fracture resistance of 7.8 ± 0.3 MPa m1/2. The performance enhancement of the resultant TiB2–SiC composite was attributed to the interlocking structure from the original anisotropic TiB2 powders, which could effectively absorb the energy and facilitate the crack deflection.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2021.11.050