Microstructural characterization of spark plasma sintered boron carbide ceramics

S. Hayun; S. Kalabukhov; V. Ezersky; M. P. Dariel; N. Frage

doi:10.1016/j.ceramint.2009.09.004

Microstructural characterization of spark plasma sintered boron carbide ceramics

S. Hayun, S. Kalabukhov, V. Ezersky, M. P. Dariel, N. Frage

Department of Materials Engineering

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

116 Scopus citations

Abstract

Fully dense boron carbide specimens were fabricated by the spark plasma sintering (SPS) technology in the absence of any sintering additives. Densification starts at 1500 °C and the highest densification rate is reached at about 1900 °C. The microstructure of the ceramic sintered at 2200 °C, with heating rates in the 50-400 °C/min range, displays abnormal grain growth, while for a 600 °C/min heating rate a homogeneous distribution of finely equiaxed grains with 4.05 ± 1.62 μm average size was obtained. TEM analysis revealed the presence of W-based amorphous and of crystalline boron-rich B₅₀N₂ secondary phases at triple-junctions. No grain-boundary films were detected by HRTEM. The formation of a transient liquid alumino-silicate phase stands apparently behind the early stage of densification.

Original language	English
Pages (from-to)	451-457
Number of pages	7
Journal	Ceramics International
Volume	36
Issue number	2
DOIs	https://doi.org/10.1016/j.ceramint.2009.09.004
State	Published - 1 Mar 2010

Keywords

Boron carbide
HRTEM
Microstructure
Sintering behaviour
Spark plasma sintering (SPS)
TEM

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2009.09.004

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title = "Microstructural characterization of spark plasma sintered boron carbide ceramics",

abstract = "Fully dense boron carbide specimens were fabricated by the spark plasma sintering (SPS) technology in the absence of any sintering additives. Densification starts at 1500 °C and the highest densification rate is reached at about 1900 °C. The microstructure of the ceramic sintered at 2200 °C, with heating rates in the 50-400 °C/min range, displays abnormal grain growth, while for a 600 °C/min heating rate a homogeneous distribution of finely equiaxed grains with 4.05 ± 1.62 μm average size was obtained. TEM analysis revealed the presence of W-based amorphous and of crystalline boron-rich B50N2 secondary phases at triple-junctions. No grain-boundary films were detected by HRTEM. The formation of a transient liquid alumino-silicate phase stands apparently behind the early stage of densification.",

keywords = "Boron carbide, HRTEM, Microstructure, Sintering behaviour, Spark plasma sintering (SPS), TEM",

author = "S. Hayun and S. Kalabukhov and V. Ezersky and Dariel, {M. P.} and N. Frage",

note = "Funding Information: This work was supported by the Israel Ministry of Science grant 3-3429 .",

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AU - Hayun, S.

AU - Kalabukhov, S.

AU - Ezersky, V.

AU - Dariel, M. P.

AU - Frage, N.

N1 - Funding Information: This work was supported by the Israel Ministry of Science grant 3-3429 .

PY - 2010/3/1

Y1 - 2010/3/1

N2 - Fully dense boron carbide specimens were fabricated by the spark plasma sintering (SPS) technology in the absence of any sintering additives. Densification starts at 1500 °C and the highest densification rate is reached at about 1900 °C. The microstructure of the ceramic sintered at 2200 °C, with heating rates in the 50-400 °C/min range, displays abnormal grain growth, while for a 600 °C/min heating rate a homogeneous distribution of finely equiaxed grains with 4.05 ± 1.62 μm average size was obtained. TEM analysis revealed the presence of W-based amorphous and of crystalline boron-rich B50N2 secondary phases at triple-junctions. No grain-boundary films were detected by HRTEM. The formation of a transient liquid alumino-silicate phase stands apparently behind the early stage of densification.

AB - Fully dense boron carbide specimens were fabricated by the spark plasma sintering (SPS) technology in the absence of any sintering additives. Densification starts at 1500 °C and the highest densification rate is reached at about 1900 °C. The microstructure of the ceramic sintered at 2200 °C, with heating rates in the 50-400 °C/min range, displays abnormal grain growth, while for a 600 °C/min heating rate a homogeneous distribution of finely equiaxed grains with 4.05 ± 1.62 μm average size was obtained. TEM analysis revealed the presence of W-based amorphous and of crystalline boron-rich B50N2 secondary phases at triple-junctions. No grain-boundary films were detected by HRTEM. The formation of a transient liquid alumino-silicate phase stands apparently behind the early stage of densification.

KW - Boron carbide

KW - HRTEM

KW - Microstructure

KW - Sintering behaviour

KW - Spark plasma sintering (SPS)

KW - TEM

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DO - 10.1016/j.ceramint.2009.09.004

M3 - Article

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SN - 0272-8842

VL - 36

SP - 451

EP - 457

JO - Ceramics International

JF - Ceramics International

IS - 2

ER -

Microstructural characterization of spark plasma sintered boron carbide ceramics

Abstract

Keywords

ASJC Scopus subject areas

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