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Conventional and two-step sintering of boron carbide ceramics with a sintering additive

Conventional and two-step sintering of boron carbide ceramics with a sintering additive Sintering refers to the consolidation of particulate matter into dense solids. Boron carbide is a material of choice for a wide variety of engineering applications, due to its unique properties. On the other hand, it is a highly covalent non-oxide ceramic, which has low diffusivity. Densification of boron carbide via thermally activated process is extremely hard and requires additional driving forces. In this study, the production of boron carbide with 0–20% Ti3SiC2 by both single-step and two-step pressureless sintering was investigated. The resultant ceramics were subjected to density measurement and microstructure and phase characterization. Boron carbide samples with 20 vol% Ti3SiC2, which were held 3 h at 1750 °C, yield ~ 81% density regardless of the number of sintering steps. Ti3SiC2 additive resulted in the formation of boron carbide–based composite with TiB2 and SiC phases in all experiments. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Australian Ceramic Society Springer Journals

Conventional and two-step sintering of boron carbide ceramics with a sintering additive

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References (29)

Publisher
Springer Journals
Copyright
Copyright © Australian Ceramic Society 2021
ISSN
2510-1560
eISSN
2510-1579
DOI
10.1007/s41779-021-00661-7
Publisher site
See Article on Publisher Site

Abstract

Sintering refers to the consolidation of particulate matter into dense solids. Boron carbide is a material of choice for a wide variety of engineering applications, due to its unique properties. On the other hand, it is a highly covalent non-oxide ceramic, which has low diffusivity. Densification of boron carbide via thermally activated process is extremely hard and requires additional driving forces. In this study, the production of boron carbide with 0–20% Ti3SiC2 by both single-step and two-step pressureless sintering was investigated. The resultant ceramics were subjected to density measurement and microstructure and phase characterization. Boron carbide samples with 20 vol% Ti3SiC2, which were held 3 h at 1750 °C, yield ~ 81% density regardless of the number of sintering steps. Ti3SiC2 additive resulted in the formation of boron carbide–based composite with TiB2 and SiC phases in all experiments.

Journal

Journal of the Australian Ceramic SocietySpringer Journals

Published: Feb 1, 2022

Keywords: Densification; Boron carbide; Sintering additive; MAX phase

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