ABRASIVE WEAR OF REFRACTORY
COMPOSITE CERAMIC SiC–Si-MATERIAL
A. P. Garshin
Translated from Novye Ogneupory, No. 9, pp. 30 – 33, September 2010.
Original article submitted June 1, 2010.
Results are provided for a study of the effect of the action of abrasive media on the wear resistance of refrac
tory ceramic SiC–Si-material prepared by reaction sintering. The abrasive media used are boron and silicon
C, SiC) and standard electrocorundum (Al
Keywords: abrasive medium, abrasive wear, wear resistance, wear-resistant composite SiC–Si-material, wear
in a mass of abrasive particles, wear in an abrasive jet.
Reaction sintered ceramic SiC–Si-materials are resistant
to high temperature, and also the action of corrosive media.
Therefore they are used extensively, especially in friction
pairs operating in chemically active media [1, 2]. Since in
engineering many mechanisms operate under the action of
abrasive media, a study of the abrasive wear resistance of
composite SiC–Si-materials with the aim of obtaining infor-
mation for their potentially effective use under these condi-
tions together with metals and some refractory materials with
quite a low resistance to abrasive wear is an important task.
The wear resistance of composite SiC–Si-material has
been studied by two methods: in a mass of abrasive particles
in a PV-7 unit [3, 4] and in an abrasive stream in a Kleis de
vice . Studies in a PV-7 unit (Fig. 1) were performed un
der the following conditions: pressure on the rubber element
of 1 kgf/cm
, rotary frequency of the element 96 rpm, rate of
supply of abrasive material 1.8 g/min . Operating condi
tions in the Kleis device (Fig. 2): abrasive stream concentra
tion 11 g/(cm
× sec), stream velocity 40 m/sec, attack angle
45 degrees .
A silicon carbide test specimen, placed in the PV-7 unit,
consisted of four SiC single crystals with a size of
10 ´ 5 ´ 1 mm, fastened to a metal substrate by epoxy resin.
Specimens of composite SiC–Si-material with a size of
20 ´ 10 ´ 4 mm were tested in the Kleis and PV-7 devices,
and SiC single crystals with a size of 10x6x1 mm were tested
in the Kleis device . Silicon carbide single crystals were
drawn from a silicon carbide node taken from a zone adja-
cent to the center of an industrial electric furnace. Specimens
of composite SiC–Si-material were prepared by well-known
technology  and the gage length of these specimens was
machined with a diamond tool to roughness R
= 0.18 – 0.25 mm
by a regime described in .
The abrasive materials used were boron carbide, silicon
carbide and standard electrocorundum powders with the
same grain size No. 16. the amount of wear resistance in both
cases was expressed in the number of minutes required for
removal of a volume of material of 1 mm
. The micro
structure of the composite materials for testing is shown in
Refractories and Industrial Ceramics Vol. 51, No. 5, January, 2011
1083-4877/11/5105-0345 © 2011 Springer Science+Business Media, Inc.
GOUVPO St. Petersburg State Polytechnic University, St. Peters
Fig. 1. Diagram of a PV-7 de
vice: 1 ) specimen of SiC–Si-ma
terial; 2 ) rubber element; 3 )
abrasive material supply unit.