Microstructure and flexural strength of hafnium diboride via flash and conventional spark plasma sintering

D. Demirskyi; T. S. Suzuki; S. Grasso; O. Vasylkiv

doi:10.1016/j.jeurceramsoc.2018.12.012

Microstructure and flexural strength of hafnium diboride via flash and conventional spark plasma sintering

D. Demirskyi^*, T. S. Suzuki, S. Grasso, O. Vasylkiv

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Microstructure evolution in bulk hafnium diboride ceramics prepared by spark plasma sintering in flash regime was compared with conventional spark plasma sintering. The conventional and flash spark plasma sintering resulted in ceramics with a high relative density exceeding 96% of their theoretical density. A remarkably fine grain size distribution was noticed for the specimen prepared in the flash regime. This atypical microstructure evolution provides a possible insight into the mechanism of flash sintering for conductive bulks. The room temperature flexural strength of the hafnium diboride processed by flash SPS was 650 MPa which is 140 MPa higher than the sample produced by conventional SPS.

Original language	English
Pages (from-to)	898-906
Number of pages	9
Journal	Journal of the European Ceramic Society
Volume	39
Issue number	4
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2018.12.012
Publication status	Published - 2019 Apr
Externally published	Yes

Keywords

Flash sintering
Flexural strength
Hafnium diboride
High temperature materials

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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10.1016/j.jeurceramsoc.2018.12.012

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title = "Microstructure and flexural strength of hafnium diboride via flash and conventional spark plasma sintering",

abstract = "Microstructure evolution in bulk hafnium diboride ceramics prepared by spark plasma sintering in flash regime was compared with conventional spark plasma sintering. The conventional and flash spark plasma sintering resulted in ceramics with a high relative density exceeding 96% of their theoretical density. A remarkably fine grain size distribution was noticed for the specimen prepared in the flash regime. This atypical microstructure evolution provides a possible insight into the mechanism of flash sintering for conductive bulks. The room temperature flexural strength of the hafnium diboride processed by flash SPS was 650 MPa which is 140 MPa higher than the sample produced by conventional SPS.",

keywords = "Flash sintering, Flexural strength, Hafnium diboride, High temperature materials",

author = "D. Demirskyi and Suzuki, {T. S.} and S. Grasso and O. Vasylkiv",

note = "Funding Information: D.D. was supported by World Premier International Research Center Initiative (WPI), MEXT, Japan . S.G. was supported by Thousand Talents Program of China and Sichuan Province . Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2019",

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doi = "10.1016/j.jeurceramsoc.2018.12.012",

language = "English",

volume = "39",

pages = "898--906",

journal = "Journal of the European Ceramic Society",

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AU - Demirskyi, D.

AU - Suzuki, T. S.

AU - Grasso, S.

AU - Vasylkiv, O.

N1 - Funding Information: D.D. was supported by World Premier International Research Center Initiative (WPI), MEXT, Japan . S.G. was supported by Thousand Talents Program of China and Sichuan Province . Publisher Copyright: © 2018 Elsevier Ltd

PY - 2019/4

Y1 - 2019/4

N2 - Microstructure evolution in bulk hafnium diboride ceramics prepared by spark plasma sintering in flash regime was compared with conventional spark plasma sintering. The conventional and flash spark plasma sintering resulted in ceramics with a high relative density exceeding 96% of their theoretical density. A remarkably fine grain size distribution was noticed for the specimen prepared in the flash regime. This atypical microstructure evolution provides a possible insight into the mechanism of flash sintering for conductive bulks. The room temperature flexural strength of the hafnium diboride processed by flash SPS was 650 MPa which is 140 MPa higher than the sample produced by conventional SPS.

AB - Microstructure evolution in bulk hafnium diboride ceramics prepared by spark plasma sintering in flash regime was compared with conventional spark plasma sintering. The conventional and flash spark plasma sintering resulted in ceramics with a high relative density exceeding 96% of their theoretical density. A remarkably fine grain size distribution was noticed for the specimen prepared in the flash regime. This atypical microstructure evolution provides a possible insight into the mechanism of flash sintering for conductive bulks. The room temperature flexural strength of the hafnium diboride processed by flash SPS was 650 MPa which is 140 MPa higher than the sample produced by conventional SPS.

KW - Flash sintering

KW - Flexural strength

KW - Hafnium diboride

KW - High temperature materials

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Microstructure and flexural strength of hafnium diboride via flash and conventional spark plasma sintering

Abstract

Keywords

ASJC Scopus subject areas

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