Russian Journal of Applied Chemistry, 2013, Vol. 86, No. 6, pp. 802−806.
Pleiades Publishing, Ltd., 2013.
Original Russian Text © O.M. Hertsyk, M.A. Kovbuz, T.G. Pereverzeva, L.M. Boichyshyn, B.Ya. Kotur, 2013, published in Zhurnal Prikladnoi Khimii, 2013,
Vol. 86, No. 6, pp. 858−863.
AND INDUSTRIAL INORGANIC CHEMISTRY
An Effect of Low Temperature Processing on Stability
of Physical and Chemical Properties of Amorphous Alloy
O. M. Hertsyk, M. A. Kovbuz, T. G. Pereverzeva, L. M. Boichyshyn, and B. Ya. Kotur
Ivan Franko Lviv National University, Lviv, Ukraine
Received May 27, 2013
Abstract—As a result of detailed investigation of physico-chemical properties of the amorphous alloy ribbon
it was found that its high-speed cooling (1–3 s) with a temperature gradient ΔT = (298–
77) K affects chemical reactivity of surface at constant volume parameters: microhardness, magnetic properties.
This feature can be used for special applications of metal-doped amorphous alloy based on Fe in extreme conditions.
The use of new materials in any branch of engineer-
ing requires a precise knowledge of their physical and
chemical characteristics in the desired conditions. It is
important to establish the connection between the material
properties depending on the component composition and
structure, the manufacturing process, processing methods,
and operational conditions. Targeted use of amorphous
metal alloys (AMA) is governed mainly by their degree
of order and corrosion resistance [1, 2].
Crystallization of AMA is actively used due to the
possibility of creating nanocrystalline ferromagnetic iron-
based alloys of a low coercivity force and high magnetic
sensitivity. Such magnetic materials are currently widely
used in space devices, which results in the direction of
research of the structure and the chemical resistance of
the AMA under the inﬂ uence of low temperatures [3, 4].
Physico-chemical characteristics of amorphous iron-
based alloy Fe
are well known
[5, 6] that is determines its widespread use as magnetic
shields, transformers, cutting tools, electrodes. In view of
the use of this alloy in the complex temperature conditions
the study examined the dependence of its structural and
electrochemical parameters on the low-temperature
A diffractometer Philips X’pert Pro PW-3040 with
-radiation was used for evaluating structural param-
eters of the amorphous alloy Fe
preliminarily heat treated at 77 K for 0.5, 1.0, 2.0, 3.0
and 5.0 h.
Anti-corrosion properties of the surface were studied
chronopotentiometrically in 0.5 M aqueous solution of
NaCl, and voltamperometrically in a range of –1.5…+0.5
V with a scan rate 20 mV s
. The scheme of the cell:
a working AMA electrode || 0.5 M aqueous solution of
NaCl || Ag | AgCl | saturated solution of KCl – reference
electrode; auxiliary electrode platinum plate. In both cases
for recording changes in the electrochemical parameters
an installation Jaissle Potentiostat/Galvanostat IMP 88
PC-R was used. In electrochemical studies, which reﬂ ect
primarily the state of the surface of AMA samples, contact
and outer surfaces of the alloy ribbons were distinguished,
which were obtained by melt spinning on the cooling
Microhardness of the precooled samples was measured
by an instrument PMT-3 at 165 g load. 
Thermomagnetograms were obtained using a vibrating
magnetometer, which records the speciﬁ c saturation