Flash spark plasma sintering of HfB2 ceramics without pre-sintering

SCRIPTA MATERIALIA

卷:156

Article

Zou, Ji¹  Grasso, Salvatore^2,3  Liu, Lei-Feng¹  Ma, Hai-Bin⁴  Reece, Mike¹  Binner, Jon¹ 

[1] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England

[2] Queen Mary Univ London, Sch Engn & Mat Sci, London, England

[3] Southwest Jiaotong Univ, Key Lab Adv Technol Mat, Minist Educ, Sch Mat Sci & Engn, Chengdu 610031, Sichuan, Peoples R China

[4] Chinese Nucl Power Technol Res Inst, Shenzhen 518026, Peoples R China

关键词: Borides;    Flash spark plasma sintering;    Sintering;    Microstructure;   

DOI  :  10.1016/j.scriptamat.2018.07.026

来源: Elsevier

【 摘 要 】

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 similar to 20 mm and height similar to 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 similar to 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. (C) 2018 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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