Synthesis of B4C/CrB2 Powders by Boron-Carbide Reduction Using Nanofiber Carbon for the Fabrication of Ceramics

Synthesis of B4C/CrB2 Powders by Boron-Carbide Reduction Using Nanofiber Carbon for the Fabrication of Ceramics Full article

Journal

Nanobiotechnology reports
ISSN: 2635-1676 , E-ISSN: 2635-1684

Output data

Year: 2023, Volume: 18, Number: Suppl. 1, Pages: S55–S62 Pages count : DOI: 10.1134/S2635167623600517

Authors

Gudyma T.S. ¹ , Shestakov V.A. ² , Dik D.V. ^1,3 , Krutskii Yu.L. ¹ , Anisimov A.G. ⁴ , Cherkasova N.Yu. ¹ , Ukhina A.V. ⁵

Affiliations

1	Novosibirsk State Technical University
2	Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences
3	Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences
4	Lavrentyev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences
5	Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences

The results of studying the process of obtaining B4C/CrB2 powder mixtures by the boron-carbide reduction of chromium oxide Cr2O3 in the presence of nanofiber carbon and the results of studying some properties of ceramics made using the synthesized powder are presented. By the method of thermodynamic modeling, it is found that the minimum temperature of the complete reduction of Cr2O3 by the boron-carbide reduction method is 1540°С at a pressure of ⁓0.08 MPa. The characteristics of powders containing 10– 70 mol % of the CrB2 phase are studied. The average size of 50% of the powder particles for the studied compositions does not exceed 11 μm. The specific surface area of the samples does not exceed 6 m2/g. The oxidation of the resulting mixtures with oxygen in air begins at a temperature of ~550°С. At the same time, when the temperature reaches 1000°С, no more than 65 wt % of powders is oxidized. Ceramics made using the synthesized powder mixture B4C–10 mol % CrB2 by hot pressing have a relative density of 95% and fracture toughness of 5.25 ± 0.15 MPa m0.5.

Gudyma T.S. , Shestakov V.A. , Dik D.V. , Krutskii Y.L. , Anisimov A.G. , Cherkasova N.Y. , Ukhina A.V.
Synthesis of B4C/CrB2 Powders by Boron-Carbide Reduction Using Nanofiber Carbon for the Fabrication of Ceramics
Nanobiotechnology reports. 2023. V.18. NSuppl. 1. P.S55–S62. DOI: 10.1134/S2635167623600517 WOS Scopus РИНЦ OpenAlex

Submitted:	Jul 28, 2023
Accepted:	Aug 28, 2023
Published print:	Sep 28, 2023

Web of science:	WOS:001188475900031
Scopus:	2-s2.0-85188427996
Elibrary:	65217507
OpenAlex:	W4393037501

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