Consolidation of B4C-VB2 eutectic ceramics by spark plasma sintering

Dmytro Demirskyi; Yoshio Sakka; Oleg Vasylkiv

doi:10.2109/jcersj2.123.1051

Consolidation of B₄C-VB₂ eutectic ceramics by spark plasma sintering

Dmytro Demirskyi, Yoshio Sakka, Oleg Vasylkiv

Advanced Institute for Materials Research (AIMR)

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

8 Citations (Scopus)

Abstract

The in situ synthesis and consolidation of B₄C-VB₂ eutectic composites by spark plasma sintering (SPS) is reported. The microstructure properties were determined for composites with the B₄C-VB₂ eutectic composition as functions of the VB₂ content and the VB₂-VB₂ interlamellar spacing. A change of VB2 concentration from 45 to 48 mol.% resulted in the formation of the rodlike eutectic microstructure. Indentation fracture toughness values higher than 4 MPa·m^1/2 were identified for eutectic composites with interlamellar spacings between 0.9 and 1.2μm. The composites obtained by SPS with a composition of 45 mol.% VB₂ exhibited a lower Vickers hardness (2324 GPa) and higher indentation fracture toughness (up to 4.5 MPa·m^1/2) than the eutectic composites with 48 mol.% of VB₂.

Original language	English
Pages (from-to)	1051-1054
Number of pages	4
Journal	Journal of the Ceramic Society of Japan
Volume	123
Issue number	1443
DOIs	https://doi.org/10.2109/jcersj2.123.1051
Publication status	Published - 2015 Nov

Keywords

Boron carbide
Eutectic
Hardness
Spark plasma sintering
Toughness

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title = "Consolidation of B4C-VB2 eutectic ceramics by spark plasma sintering",

abstract = "The in situ synthesis and consolidation of B4C-VB2 eutectic composites by spark plasma sintering (SPS) is reported. The microstructure properties were determined for composites with the B4C-VB2 eutectic composition as functions of the VB2 content and the VB2-VB2 interlamellar spacing. A change of VB2 concentration from 45 to 48 mol.% resulted in the formation of the rodlike eutectic microstructure. Indentation fracture toughness values higher than 4 MPa·m1/2 were identified for eutectic composites with interlamellar spacings between 0.9 and 1.2μm. The composites obtained by SPS with a composition of 45 mol.% VB2 exhibited a lower Vickers hardness (2324 GPa) and higher indentation fracture toughness (up to 4.5 MPa·m1/2) than the eutectic composites with 48 mol.% of VB2.",

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AU - Demirskyi, Dmytro

AU - Sakka, Yoshio

AU - Vasylkiv, Oleg

PY - 2015/11

Y1 - 2015/11

N2 - The in situ synthesis and consolidation of B4C-VB2 eutectic composites by spark plasma sintering (SPS) is reported. The microstructure properties were determined for composites with the B4C-VB2 eutectic composition as functions of the VB2 content and the VB2-VB2 interlamellar spacing. A change of VB2 concentration from 45 to 48 mol.% resulted in the formation of the rodlike eutectic microstructure. Indentation fracture toughness values higher than 4 MPa·m1/2 were identified for eutectic composites with interlamellar spacings between 0.9 and 1.2μm. The composites obtained by SPS with a composition of 45 mol.% VB2 exhibited a lower Vickers hardness (2324 GPa) and higher indentation fracture toughness (up to 4.5 MPa·m1/2) than the eutectic composites with 48 mol.% of VB2.

AB - The in situ synthesis and consolidation of B4C-VB2 eutectic composites by spark plasma sintering (SPS) is reported. The microstructure properties were determined for composites with the B4C-VB2 eutectic composition as functions of the VB2 content and the VB2-VB2 interlamellar spacing. A change of VB2 concentration from 45 to 48 mol.% resulted in the formation of the rodlike eutectic microstructure. Indentation fracture toughness values higher than 4 MPa·m1/2 were identified for eutectic composites with interlamellar spacings between 0.9 and 1.2μm. The composites obtained by SPS with a composition of 45 mol.% VB2 exhibited a lower Vickers hardness (2324 GPa) and higher indentation fracture toughness (up to 4.5 MPa·m1/2) than the eutectic composites with 48 mol.% of VB2.

KW - Boron carbide

KW - Eutectic

KW - Hardness

KW - Spark plasma sintering

KW - Toughness

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JO - Journal of the Ceramic Society of Japan

JF - Journal of the Ceramic Society of Japan

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ER -

Consolidation of B₄C-VB₂ eutectic ceramics by spark plasma sintering

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Keywords

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