Abstract
Strong HfB2 powder green bodies with compressive strengths exceeding 20 MPa have been produced by incorporating 1 wt% of glassy carbon derived from a pyrolyzed phenolic resin binder. Starting from the green body after debinding in argon, non-textured HfB2 ceramics (diameter ~ 20 mm and height ~ 4 mm) with a relative density of 95.1% were achieved using flash spark plasma sintering (FSPS) with a discharge time of 20 s, peak power of 19 kW and applied pressure of ~16 MPa. The lack of a need for a pre-sintering step resulted in energy savings compared to the densification of HfB2 ceramics by FSPS.
Original language | English |
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Pages (from-to) | 115-119 |
Journal | Scripta Materialia |
Volume | 156 |
Early online date | 25 Jul 2018 |
DOIs | |
Publication status | Published - 1 Nov 2018 |
Keywords
- borides
- flash spark plasma sintering
- sintering
- microstructure