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

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

2 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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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.",

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AU - Demirskyi, D.

AU - Suzuki, T. S.

AU - Grasso, S.

AU - Vasylkiv, O.

PY - 2019/4

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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.

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