SELF-PROPAGATING HIGH-TEMPERATURE SYNTHESIS TECHNOLOGY
FOR PREPARATION OF POROUS PERMEABLE MATERIALS
V. I. Vereshchagin,
V. V. Evstigneev,
D. V. Kolesnikov,
V. I. Prolubnikov,
and N. P. Tubalov
Translated from Novye Ogneupory, No. 12, pp. 40 – 43, December, 2005.
Original article submitted April 22, 2005.
The principles for development of porous permeable materials based on the self-propagating high-tempera
ture synthesis are discussed. A technology based on the use of industrial oxide wastes from the mechanical en
gineering industry is proposed.
In this paper we propose self-propagating high-tempera
ture synthesis (SHS) as a technique for preparation of porous
permeable materials. The appealing features of this tech-
nique are moderate power consumption, waste-free techno-
logy, and dynamically varied combination of structural and
other properties of the products.
Issues concerning the optimum choice of the technologi-
cal process for preparation of porous permeable SHS-based
materials have been defined. An efficient organization of the
technological complex for the manufacture of SHS products
using oxide materials, in particular stainless steel oxide
scale, has been considered. Based on structural analysis data,
interactions in partial systems and a target three-component
system oxide scale – chromium oxide – aluminum have been
compared and discussed.
BASIC PRINCIPLES IN THE DESIGN OF POROUS
PERMEABLE METALLOCERAMIC COMPONENTS
Currently, the state of the art in industry and environ
mental engineering is characterized by the increased con
sumption of porous permeable metalloceramic materials
(PMM) which constitute the basis for various applications.
The multiplicity in design and service conditions of PMM re
quires a wide range of these materials targeted at optimum
technological and economic solutions of specified concrete
Porous materials intended to be used for filtration tech
nologies are normally prepared as spherical or nonspherical
metal and alloy powders or metal fibers. Powders composed
of spherically shaped particles are prepared by spraying a
molten metal and are usually used in porous partitions with
high permeability [1 – 3].
Filtering cells of porous metalloceramics exhibit a wide
range of performance characteristics, so that choosing one or
another type for treating a polluted medium or for specific
service conditions or for filter recovery presents no problem.
The main parameters that determine performance of the po-
rous metalloceramic partitions can be easily controlled.
These parameters are the total porosity (density), air (or li-
quid) permeability index, pore size, filtration fineness, and
strength. It should be noted that filtration processes through
filtering cells are not only of scientific interest but also have
some technological implications .
At present, the major trend in modern powder metallurgy
is development of so-called “intelligent” processing of mate
rials. Regarding the materials science this concept signifies
that the creation of materials must be based on the principles
of self-restoration, self-regulation, and self-diagnostics; this
having been granted, the properties of materials under in-ser
vice conditions do not deteriorate; rather, they may even im
prove or, at the least, remain unaffected. As an example, one
may refer to shape memory materials and functionally gradi
ent and composite materials.
The “intelligent” technology concept presupposes that
the manufacturing process can be reduced to a few complex
operations with a maximum possible degree of conversion
amenable to multiparameter optimization, processing con
trol, and automatic product quality control.
The spectacular example of a process that can be used as
a technological basis for powder metallurgy is self-propagat
Refractories and Industrial Ceramics Vol. 46, No. 6, 2005
1083-4877/05/4606-0416 © 2005 Springer Science+Business Media, Inc.
Tomsk Polytechnical University, Tomsk, Russia; I. I. Polzunov
Altai State Technical University, Barnaul, Russia; Almaz Re
search and Production Enterprise, Barnaul, Russia.