High-Temperature Strength of Boron Suboxide Ceramic Consolidated by Spark Plasma Sintering

Dmytro Demirskyi; Ievgen Solodkyi; Yoshio Sakka; Oleg Vasylkiv

doi:10.1111/jace.14308

High-Temperature Strength of Boron Suboxide Ceramic Consolidated by Spark Plasma Sintering

Dmytro Demirskyi, Ievgen Solodkyi, Yoshio Sakka, Oleg Vasylkiv

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

10 Citations (Scopus)

Abstract

The spark plasma sintering (SPS) of B₆O ceramics using a highly crystalline boron suboxide powder with a low oxygen deficiency level is reported. The monolithic boron suboxide ceramic exhibited a room-temperature strength of 300 ± 20 MPa, which is comparable to the strength of monolithic boron carbide. With increasing flexural test temperature, the strength of the boron suboxide ceramics increased to 450 MPa at 1400°C. The increase in strength with the temperature is associated with the unique microstructure of boron suboxide grains, which allows intergranular “brittle” fracture along subgrains even at 1400°C. This suggests that even higher strengths can be achieved.

Original language	English
Pages (from-to)	2769-2777
Number of pages	9
Journal	Journal of the American Ceramic Society
Volume	99
Issue number	8
DOIs	https://doi.org/10.1111/jace.14308
Publication status	Published - 2016 Aug 1
Externally published	Yes

Keywords

boron suboxide
high-temperature strength
spark plasma sintering

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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10.1111/jace.14308

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title = "High-Temperature Strength of Boron Suboxide Ceramic Consolidated by Spark Plasma Sintering",

abstract = "The spark plasma sintering (SPS) of B6O ceramics using a highly crystalline boron suboxide powder with a low oxygen deficiency level is reported. The monolithic boron suboxide ceramic exhibited a room-temperature strength of 300 ± 20 MPa, which is comparable to the strength of monolithic boron carbide. With increasing flexural test temperature, the strength of the boron suboxide ceramics increased to 450 MPa at 1400°C. The increase in strength with the temperature is associated with the unique microstructure of boron suboxide grains, which allows intergranular “brittle” fracture along subgrains even at 1400°C. This suggests that even higher strengths can be achieved.",

keywords = "boron suboxide, high-temperature strength, spark plasma sintering",

author = "Dmytro Demirskyi and Ievgen Solodkyi and Yoshio Sakka and Oleg Vasylkiv",

note = "Funding Information: We thank Dr. Toshiyuki Nishimura (NIMS) for the use of the high-temperature strength measurement facility. This study was partially supported from the Grant-in-Aid for Scientific Research B from Japan Society for the Promotion of Science (JSPS).",

year = "2016",

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doi = "10.1111/jace.14308",

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T1 - High-Temperature Strength of Boron Suboxide Ceramic Consolidated by Spark Plasma Sintering

AU - Demirskyi, Dmytro

AU - Solodkyi, Ievgen

AU - Sakka, Yoshio

AU - Vasylkiv, Oleg

N1 - Funding Information: We thank Dr. Toshiyuki Nishimura (NIMS) for the use of the high-temperature strength measurement facility. This study was partially supported from the Grant-in-Aid for Scientific Research B from Japan Society for the Promotion of Science (JSPS).

PY - 2016/8/1

Y1 - 2016/8/1

N2 - The spark plasma sintering (SPS) of B6O ceramics using a highly crystalline boron suboxide powder with a low oxygen deficiency level is reported. The monolithic boron suboxide ceramic exhibited a room-temperature strength of 300 ± 20 MPa, which is comparable to the strength of monolithic boron carbide. With increasing flexural test temperature, the strength of the boron suboxide ceramics increased to 450 MPa at 1400°C. The increase in strength with the temperature is associated with the unique microstructure of boron suboxide grains, which allows intergranular “brittle” fracture along subgrains even at 1400°C. This suggests that even higher strengths can be achieved.

AB - The spark plasma sintering (SPS) of B6O ceramics using a highly crystalline boron suboxide powder with a low oxygen deficiency level is reported. The monolithic boron suboxide ceramic exhibited a room-temperature strength of 300 ± 20 MPa, which is comparable to the strength of monolithic boron carbide. With increasing flexural test temperature, the strength of the boron suboxide ceramics increased to 450 MPa at 1400°C. The increase in strength with the temperature is associated with the unique microstructure of boron suboxide grains, which allows intergranular “brittle” fracture along subgrains even at 1400°C. This suggests that even higher strengths can be achieved.

KW - boron suboxide

KW - high-temperature strength

KW - spark plasma sintering

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