Flash spark plasma sintering of HfB2 ceramics without pre-sintering

Ji Zou, Salvatore Grasso, Lei-Feng Liu, Hai-Bin Ma, Michael Reece, Jon Binner

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)
173 Downloads (Pure)

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 languageEnglish
Pages (from-to)115-119
JournalScripta Materialia
Volume156
Early online date25 Jul 2018
DOIs
Publication statusPublished - 1 Nov 2018

Keywords

  • borides
  • flash spark plasma sintering
  • sintering
  • microstructure

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