Abstract
The spark plasma sintering (SPS) of B6O ceramics using a highly crystalline boron suboxide powder with a low oxygen deficiency level is reported. The monolithic boron suboxide ceramic exhibited a room-temperature strength of 300 ± 20 MPa, which is comparable to the strength of monolithic boron carbide. With increasing flexural test temperature, the strength of the boron suboxide ceramics increased to 450 MPa at 1400°C. The increase in strength with the temperature is associated with the unique microstructure of boron suboxide grains, which allows intergranular “brittle” fracture along subgrains even at 1400°C. This suggests that even higher strengths can be achieved.
Original language | English |
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Pages (from-to) | 2769-2777 |
Number of pages | 9 |
Journal | Journal of the American Ceramic Society |
Volume | 99 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2016 Aug 1 |
Externally published | Yes |
Keywords
- boron suboxide
- high-temperature strength
- spark plasma sintering
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry