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Production of ZrB2-SiC Based UHTCs with Addition of Boron Carbide and Graphene

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Abstract:

The work aimed to obtain zirconium diboride ZrB2 and silicon carbide SiC based ultra-high temperature ceramics, which have improved properties due to the unique morphology of starting ultrafine homogeneous composite powders. Such properties make it possible to use the product as thermal protection materials of hypersonic aircraft. The novelty of the research is the use of methods that lead to relevant selection of sintering additives/dopants and obtaining a fine microstructure, as well as the combined effect of these factors. Boron carbide B4C, graphite powder, carbon black, and graphene structures are used as sintering additives. ZrB2 nano powders with different stoichiometry and graphene nanostructural inclusions are produced and then their nanopowder ceramic composites with SiC are made by vacuum hot-pressing method at 1700–1750°C. The following key properties of powders and ceramics were determined: morphology, elemental and phase compositions, particle size distribution, relative density, hardness, and flexural strength and modulus.

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Periodical:

Materials Science Forum (Volume 1165)

Pages:

51-62

DOI:

https://doi.org/10.4028/p-Oakg8Q

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Online since:

November 2025

Authors:

Zviad Mestvirishvili*, Ekaterine Sanaia, Natia Jalagonia, Tinatin Kuchukhidze, Nino Darakhvelidze, Tetiana Prikhna, Merab Rizhamadze, Giorgi Giorganashvili, David Jishiashvili

Keywords:

Aircraft, Graphene, Hypersonic, UHTCs

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© 2025 Trans Tech Publications Ltd. All Rights Reserved

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