1. Single-phase W2B5 ceramic enabled remarkable performance via spark plasma sintering-high-frequency (SPS-HF) process.
- Author
-
Yang, Xiao-Hui and Zhang, Guo-Hua
- Subjects
- *
CERAMICS , *MECHANICAL behavior of materials , *CERAMIC materials , *VICKERS hardness , *SPECIFIC gravity , *FRACTURE toughness - Abstract
The preparation of dense single-phase boride ceramics has always been a challenge. In this paper, single-phase W 2 B 5 ceramic with excellent performance was successfully prepared using W 2 B 5 powder and SPS-HF technology. Under the sintering condition of 1800 °C and 50 MPa, a nearly dense W 2 B 5 ceramic material with excellent mechanical properties was obtained. The relative density of the as-sintered W 2 B 5 ceramic achieved 96.72 % without any sintering additive. Additionally, the Vickers hardness, fracture toughness as well as bending strength were 30 GPa (9.8 N), 5.39 MPa·m1/2 and 522.7 MPa, respectively. The outstanding hardness and bending strength of W 2 B 5 ceramic could be attributed to its monophase W 2 B 5 structure and high densification degree. The primary fracture mode of W 2 B 5 ceramic was transgranular fracture, and the toughening mechanisms included crack deflection, crack bridging, and crack branching. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF