COMPOSITE CERAMIC BASED ON CUBIC BORON NITRIDE
AND CARBON NANOSTRUCTURES
F. A. Akopov,
M. A. Adrianov,
R. Kh. Amirov,
T. I. Borodina,
L. B. Borovkova,
G. E. Val’yano,
A. Yu. Dolgoborodov,
V. V. Tkachenko,
and M. B. Shavelkina
Translated from Novye Ogneupory, No. 9, pp. 39 – 43, September, 2016.
Original article submitted July 6, 2016.
Hot pressing is used to prepare composite ceramic based on cubic boron nitride (CBN) reinforced with carbon
nanostructures. Carbon nanostructures (CNS) are synthesized by hydrocarbon pyrolysis in a plasm-jet reactor
in an argon plasma. The effect of composite material nanostructuring is obtained from results of study and
specification of test composite specimens and starting materials by physicochemical methods, x-ray diffrac
tion, and electron microscopy. This leads to a change in its functional properties.
Keywords: oxygen-free ceramic, cubic boron nitride (CBN), hot pressing, carbon nanostructures (CNS),
thermal plasma, coherent scattering region (CSR).
In order to resolve a large number of problems in differ-
ent high-tech industries such as engineering, power genera-
tion, aerospace and military industries, automobile building,
high-temperature composite materials are most effective.
Compared with metallic materials ceramic objects exhibit a
set of unique properties and have a number of advantages
when we are talking about high temperature, mechanical
loads, corrosion, erosion, and radiation resistance. The over
all trend in development of high-temperature material sci
ence shows that currently there is intense study of composite
materials based on a ceramic matrix of oxide-free refractory
compounds, i.e., borides, carbides, nitrides, and silicides of
transition metals, and also SiC, B
, and AlN. Resting
on the principles and possibility of powder (ceramic) tech
nology, it is possible to create by means of these refractory
compounds numerous composite materials for various prac
tical applications [1 – 3].
The level of properties for ceramic materials depends on
many factors: preparation technology and starting powder
properties, mixing method, method for molding and firing
objects, and subsequent treatment. An important task is a re
duction in the scatter of material property values. The main
process having a strong effect on the structure and properties
of ceramic composite material made from oxygen-free re-
fractory compounds is high-temperature synthesis with
which there is physical (evaporation-condensation, recrystal-
lization through liquid phase, diffusion-viscous flow, etc.)
and chemical processes leading to formation of a matrix and
composite as a whole.
Various additions have a considerable effect on ceramic
matrix properties, which facilitate the best joining of parti
cles during material compaction and sintering. According to
a number of works by overseas scientists [4 – 6] with rein
forcement of ceramic based on Si
by SiC nanoparticles
there is an increase in strength from 700 (for a normal com
posite) to 1300 MPa (for a nanocomposite), and crack resis
tance from 5.3 to 7 MPa/m
. In addition, in the Honeywell
Company and in the universities of Huston and California
there is development of nanocomposites based on silicon
nitride with different content of reinforcing nanoparticles,
which are prepared by spark plasma sintering, hot isostatic
sintering, and sintering at low pressure. Divisions of NASA,
AFRL, and Rice University are conducting work on nano
composites based on ceramic reinforced with nanotubes.
Features are considered in this article for preparation and
properties of modified ceramic materials based on boron
nitride. Modification is achieved by introducing filler
nanoparticles (carbon) in a small amount into a material ma
Refractories and Industrial Ceramics Vol. 57, No. 5, January, 2017
1083-4877/17/05705-0496 © 2017 Springer Science+Business Media New York
FGBUN Russian Academy of Sciences Joint Institute of High
Temperature, Moscow, Russia.
OOO Mikrobor Kompozit, Moscow, Russia.