CERAMIC COMPOSITE MATERIAL BASED ON SILICON CARBIDE
AND CORUNDUM WITH A CORUNDUM MATRIX
A. P. Garshin,
V. M. Shumyacher,
and O. I. Pushkarev
Translated from Novye Ogneupory, No. 1, pp. 31 – 34, January 2014.
Original article submitted October 17, 2013.
Results are provided for studying preparation and some properties of an abrasive composite material of the
system with a corundum matrix. The material is prepared by adding molten aluminum to a charge
used in existing manufacturing technology for commercial grade silicon carbide.
Keywords: silicon carbide, corundum, silicon dioxide, petroleum coke, aluminum metal, SiC–Al
Synthesis of composite materials is accomplished by
adding aluminum to a traditional charge used in technology
for obtaining silicon carbide by the reaction 
+ 3C = SiC + 2CO. (1)
Addition of aluminum metal to a charge, used in existing
manufacture of commercial grade silicon carbide, provides
occurrence of this process in accordance with the reaction 
+ C + 4/3Al = SiC + 2/3Al
Reaction (2) proceeds with formation of SiC–Al
composite material, within which a multitude of SiC silicon
carbide grains are uniformly distributed in an Al
dum matrix .
A starting charge was prepared from quartz sand, alumi-
num powder, and petroleum coke in the accepted
stoichiometric ratio. The quartz sand used contained not less
than 99.1% SiO
and not more than 0.25% Fe
. The alumi-
num and carbon materials in a charge were added as alumi-
num powder grade APV and low-sulfur petroleum coke with
an active carbon content of 80 – 85%. Composite material
from a charge a charge was obtained in a laboratory electric
resistance furnace with a power of 160 kW, furnace working
length 1300 and width 1100 mm (Fig. 1).
Temperature in the furnace was monitored with an opti-
cal pyrometer using a special sighting tube. Samples were
prepared from synthesis products by dry grinding in a jaw-
breaker. Fractions of 1600 – 1250 mm were screened from
fractions finer than 5 mm, for which chemical, microscopic,
electron-probe microanalyses were carried out, micro-
mechanical studies were performed, and also the operating
properties of grains of composite materials were determined
in a grinding tool by a well-known procedure [2, 3].
X-ray structural analysis was carried out by a photo-
graphic method in URS-55 equipment in copper filtered radi-
ation in a Debye camera. Microstructure was studied in
Refractories and Industrial Ceramics Vol. 55, No. 1, May, 2014
1083-4877/14/05501-0026 © 2014 Springer Science+Business Media New York
FGBOU VPO St Petersburg State Polytechnic University, St. Pe
FGBOU VPO Volgograd State Architecture and Building Univer
sity, Volgograd, Russia.
Fig. 1. Transverse and longitudinal sections of batch resistance fur
nace: 1, 2 ) thermocouples; 3 ) reaction charge; 4 ) reaction mixture;
5 ) heat insulation mixture; 50 working electrode; 6 ) heating core.