Preparation of Composites in the ZrB₂Si System
and Investigation of Their Properties

I. B. Ban’kovskaya*, D. V. Kolovertnov, and L. P. Efimenko

Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences,
nab. Admirala Makarova 2, St. Petersburg, 199034 Russia

*e-mail: inbankov@isc1.nw.ru

Received May 28, 2010

Abstract—The refractory glass-ceramic materials based on the ZrB₂–Si composite have been prepared by
nonisothermal oxidation in air, and their structure, phase composition, and properties (porosity, thermal expan-
sion, and refractoriness) have been investigated. The composite materials have a complex heterogeneous struc-
ture: crystalline particles of the initial phases (ZrB₂, Si) and the phases formed as a result of oxidation in air
(ZrO₂, ZrSiO₄, and -cristobalite) are encapsulated in the vitreous matrix.

Keywords: refractory glass-ceramic materials, reaction synthesis, silicon, zirconium boride, protection of
graphite from oxidation

DOI: 10.1134/S1087659611020039

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