NaB5C–B5/C Composite Ceramics Prepared by Reaction Sintering in Na Vapor

Haruhiko Morito; Takuma Kimura; Hisanori Yamane

doi:10.1111/jace.14204

NaB₅C–B₅/C Composite Ceramics Prepared by Reaction Sintering in Na Vapor

Haruhiko Morito, Takuma Kimura, Hisanori Yamane

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

2 Citations (Scopus)

Abstract

Reaction sintering of sodium carbaboride (NaB₅C) was performed by heating compacts of mixtures of amorphous boron (B) and carbon black (C) powders (B/C molar ratio, 5/1) at 1173 K in Na vapor. The ceramics obtained from the compacts of B₅/C powder mixed with a ball mill (compact density, 1.67 Mg/m³) were the composites of NaB₅C (74 mass%) and unreacted B₅/C (26 mass%). The bulk density and bending strength of the composite ceramics were 2.04 ± 0.03 Mg/m³ and 320.9 ± 10.4 MPa, respectively. Transmission electron microscope observation revealed that nanometer-size amorphous grains of B or C were included in the matrix of NaB₅C.

Original language	English
Pages (from-to)	2422-2427
Number of pages	6
Journal	Journal of the American Ceramic Society
Volume	99
Issue number	7
DOIs	https://doi.org/10.1111/jace.14204
Publication status	Published - 2016 Jan 1

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

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title = "NaB5C–B5/C Composite Ceramics Prepared by Reaction Sintering in Na Vapor",

abstract = "Reaction sintering of sodium carbaboride (NaB5C) was performed by heating compacts of mixtures of amorphous boron (B) and carbon black (C) powders (B/C molar ratio, 5/1) at 1173 K in Na vapor. The ceramics obtained from the compacts of B5/C powder mixed with a ball mill (compact density, 1.67 Mg/m3) were the composites of NaB5C (74 mass%) and unreacted B5/C (26 mass%). The bulk density and bending strength of the composite ceramics were 2.04 ± 0.03 Mg/m3 and 320.9 ± 10.4 MPa, respectively. Transmission electron microscope observation revealed that nanometer-size amorphous grains of B or C were included in the matrix of NaB5C.",

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AU - Kimura, Takuma

AU - Yamane, Hisanori

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