Reactive sintering of TiB2-SiC-CNT ceramics

Oleksii Popov; Jozef Vleugels; Asgar Huseynov; Vlad Vishnyakov

doi:10.1016/j.ceramint.2019.07.317

Reactive sintering of TiB2-SiC-CNT ceramics

Oleksii Popov, Jozef Vleugels, Asgar Huseynov, Vlad Vishnyakov

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

21 Citations (Scopus)

Abstract

TiB2-SiC ceramics with multi-wall carbon nanotubes (MW-CNT) were reactively hot pressed at 1800 °C and 30 MPa. Carbon nanotubes survived the process and could be clearly observed in the sintered ceramics. The insitu exothermic reactions between TiC, B4C and Si accelerated the densification and produced nonporous TiB2- SiC ultrahigh-temperature ceramics within 1 min at 1800 °C. Although the toughness of the ceramic was not significantly affected by the CNT addition, remaining around 6 MPam1/2, the CNT presence resulted in a substantial
improvement in TiB2-SiC thermal shock resistance. The Vickers hardness decreased from 27 GPa for the CNT-free matrix to 21 GPa for ceramic with maximum CNT content (7.4 wt%).

Original language	English
Pages (from-to)	22769-22774
Number of pages	6
Journal	Ceramics International
Volume	45
Issue number	17
Early online date	29 Jul 2019
DOIs	https://doi.org/10.1016/j.ceramint.2019.07.317
Publication status	Published - 1 Dec 2019

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title = "Reactive sintering of TiB2-SiC-CNT ceramics",

abstract = "TiB2-SiC ceramics with multi-wall carbon nanotubes (MW-CNT) were reactively hot pressed at 1800 °C and 30 MPa. Carbon nanotubes survived the process and could be clearly observed in the sintered ceramics. The insitu exothermic reactions between TiC, B4C and Si accelerated the densification and produced nonporous TiB2- SiC ultrahigh-temperature ceramics within 1 min at 1800 °C. Although the toughness of the ceramic was not significantly affected by the CNT addition, remaining around 6 MPam1/2, the CNT presence resulted in a substantialimprovement in TiB2-SiC thermal shock resistance. The Vickers hardness decreased from 27 GPa for the CNT-free matrix to 21 GPa for ceramic with maximum CNT content (7.4 wt%).",

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T1 - Reactive sintering of TiB2-SiC-CNT ceramics

AU - Popov, Oleksii

AU - Vleugels, Jozef

AU - Huseynov, Asgar

AU - Vishnyakov, Vlad

PY - 2019/12/1

Y1 - 2019/12/1

N2 - TiB2-SiC ceramics with multi-wall carbon nanotubes (MW-CNT) were reactively hot pressed at 1800 °C and 30 MPa. Carbon nanotubes survived the process and could be clearly observed in the sintered ceramics. The insitu exothermic reactions between TiC, B4C and Si accelerated the densification and produced nonporous TiB2- SiC ultrahigh-temperature ceramics within 1 min at 1800 °C. Although the toughness of the ceramic was not significantly affected by the CNT addition, remaining around 6 MPam1/2, the CNT presence resulted in a substantialimprovement in TiB2-SiC thermal shock resistance. The Vickers hardness decreased from 27 GPa for the CNT-free matrix to 21 GPa for ceramic with maximum CNT content (7.4 wt%).

AB - TiB2-SiC ceramics with multi-wall carbon nanotubes (MW-CNT) were reactively hot pressed at 1800 °C and 30 MPa. Carbon nanotubes survived the process and could be clearly observed in the sintered ceramics. The insitu exothermic reactions between TiC, B4C and Si accelerated the densification and produced nonporous TiB2- SiC ultrahigh-temperature ceramics within 1 min at 1800 °C. Although the toughness of the ceramic was not significantly affected by the CNT addition, remaining around 6 MPam1/2, the CNT presence resulted in a substantialimprovement in TiB2-SiC thermal shock resistance. The Vickers hardness decreased from 27 GPa for the CNT-free matrix to 21 GPa for ceramic with maximum CNT content (7.4 wt%).

KW - Carbon nanotubes

KW - CNT composite

KW - Ultrahigh-temperature ceramics

KW - Borides

KW - Reactive sintering

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EP - 22774

JO - Ceramics International

JF - Ceramics International

SN - 0272-8842

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Reactive sintering of TiB2-SiC-CNT ceramics

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