<abstract xmlns="http://www.w3.org/1999/xhtml">The improved TiB2 ceramics were obtained in sintering process at the pressure of 5.5 GPa and temperature of 1550 °C in presence of metallic Co powder. The effect of Co content (ranging from 0 wt.% to 10.0 wt.%) on the phase composition, density, microstructure, Vickers hardness and thermal conductivity of TiB2 ceramics was analyzed. A small amount of new phase Co2B has been created in the reaction of TiB2 and Co. The relative density of sintered TiB2 ceramics reached 98.1 %. When the mass fraction of Co increased, the porosity increased, while the hardness first increased and then decreased. The maximal Vickers hardness values were equal to 33.3 GPa or 28.2 GPa when the used load was of 4.9 N or 9.8 N, respectively. The highest reached value of thermal conductivity was 88.9 W˙m−1 ˙ K−1. The dense TiB2 ceramics with improved hardness and thermal conductivity were ascribed to the high pressure sintering method and Co sintering aid. High pressure sintering method provides a new way for the preparation of ceramics materials.</abstract>

The improved TiB2 ceramics were obtained in sintering process at the pressure of 5.5 GPa and temperature of 1550 °C in presence of metallic Co powder. The effect of Co content (ranging from 0 wt.% to 10.0 wt.%) on the phase composition, density, microstructure, Vickers hardness and thermal conductivity of TiB2 ceramics was analyzed. A small amount of new phase Co2B has been created in the reaction of TiB2 and Co. The relative density of sintered TiB2 ceramics reached 98.1 %. When the mass fraction of Co increased, the porosity increased, while the hardness first increased and then decreased. The maximal Vickers hardness values were equal to 33.3 GPa or 28.2 GPa when the used load was of 4.9 N or 9.8 N, respectively. The highest reached value of thermal conductivity was 88.9 W˙m−1 ˙ K−1. The dense TiB2 ceramics with improved hardness and thermal conductivity were ascribed to the high pressure sintering method and Co sintering aid. High pressure sintering method provides a new way for the preparation of ceramics materials.

Rapid sintering of TiB2 ceramics using Co as sintering aid under high pressure condition

Materials Science-Poland

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Rapid sintering of TiB ceramics using Co as sintering aid under high pressure condition

The improved TiB2 ceramics were obtained in sintering process at the pressure of 5.5 GPa and temperature of 1550 °C in presence of metallic Co powder. The...

Rapid sintering of TiB₂ ceramics using Co as sintering aid under high pressure condition

Published Online: Dec 12, 2020

Page range: 502 - 507

Received: Jan 01, 2019

Accepted: Apr 23, 2019

DOI: https://doi.org/10.2478/msp-2020-0050

Keywords
titanium diboride, cobalt, high pressure, sintering

© 2020 Meihua Hu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Rapid sintering of TiB2 ceramics using Co as sintering aid under high pressure condition

Published Online: Dec 12, 2020

Page range: 502 - 507

Received: Jan 01, 2019

Accepted: Apr 23, 2019

DOI: https://doi.org/10.2478/msp-2020-0050

Keywordstitanium diboride, cobalt, high pressure, sintering

© 2020 Meihua Hu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Rapid sintering of TiB₂ ceramics using Co as sintering aid under high pressure condition

Keywords
titanium diboride, cobalt, high pressure, sintering