Preparation of TiB2–SiC composites toughened with interlocking microstructure by self-assembled TiB2 plates. Issue 4 (15th February 2022)

• Record Type: Journal Article
• Authors: Li, Xingchao; Zhang, Tong; Chen, Chen; Song, Shaolei; Shen, Sunyi; He, Guanzhong; Li, Zheng; Li, Rong; Zhen, Qiang; Bashir, Sajid; Liu, Jingbo Louise
• Is Part Of: Ceramics international. Volume 48:Issue 4(2022)
• Page Start: 5119
• Page End: 5129
• Publication Date: 2022-02-15
• Subjects: Ultra-high temperature ceramics -- Self-assembled TiB2 plates -- Interlocking structure -- Fracture resistance; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.11.050
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: 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 m 1/2 . 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.