Manufacturing Technology 2020, 20(3):394-400 | DOI: 10.21062/mft.2020.046

Hot Pressing of Boron Carbide Based Ceramic Composites

Pavol ©vec, Zuzana Gábri¹ová, Alena Brusilová
Institute of Technologies and Materials, Faculty of Mechanical Engineering, Slovak University of Technology in Bratislava. Námestie slobody 17, 812 31 Bratislava. Slovak Republic

Ceramic composite materials based on boron carbide were hot pressed utilising in situ reaction of boron carbide powder with 40 wt.% of titanium dioxide sintering additive. The samples were prepared at sintering temperature of 1850 °C, pressure of 35 MPa, and time of 60 min in vacuum atmosphere of about 20 Pa. Optimisation of sintering regime concentrating on both heating stage of sintering and application of pressure enabled to prepare fully dense ceramic composite materials composed of boron carbide matrix with 29.5 vol.% of titanium diboride secondary phase. The ceramic composite reached average density of 99.3 %, hardness of 29.8 GPa, and fracture toughness of 6.9 MPa.m1/2.

Keywords: boron carbide, ceramic composite, sintering, microstructure
Grants and funding:

Scientific Grant Agency of the Ministry of Education, Science, Research and Sport of the Slovak Republic under the VEGA 1/0298/18 contract. The work was supported by UVP STU Bratislava the ITMS 26240220084 project.

Received: May 1, 2020; Revised: July 16, 2020; Accepted: July 20, 2020; Prepublished online: September 3, 2020; Published: September 7, 2020  Show citation

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©vec P, Gábri¹ová Z, Brusilová A. Hot Pressing of Boron Carbide Based Ceramic Composites. Manufacturing Technology. 2020;20(3):394-400. doi: 10.21062/mft.2020.046.
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