ISSN 0010-5082, Combustion, Explosion, and Shock Waves, 2018, Vol. 54, No. 3, pp. 350–356.
Pleiades Publishing, Ltd., 2018.
Original Russian Text
A.G. Korotkikh, V.A. Arkhipov, K.V. Slyusarsky, I.V. Sorokin.
Study of Ignition of High-Energy Materials
with Boron and Aluminum and Titanium Diborides
A. G. Korotkikh
K. V. Slyusarsky
, and I. V. Sorokin
Published in Fizika Goreniya i Vzryva, Vol. 54, No. 3, pp. 109–115, May–June, 2018.
Original article submitted September 1, 2017; revision submitted October 19, 2017.
Abstract: This paper describes the ignition of high-energy materials (HEMs) on the basis of
ammonium perchlorate and ammonium nitrate and an energetic binder, containing the powders of
Al (base composition), B, AlB
, upon initiation of the process by a CO
the heat ﬂux density range of 90–200 W/cm
. The ignition delay time and surface temperature of
the reaction layer during the heating and ignition of HEMs in air are determined. It is obtained
that the complete replacement of a micron-sized aluminum powder by amorphous boron in the
composition of HEMs signiﬁcantly reduces the ignition delay time of the sample (by 2.2–2.8 times)
with the same heat ﬂux density, and this occurs due to the high chemical activity of and diﬀerence
between the mechanisms of oxidation of boron particles. The use of aluminum diboride in HEMs
reduces the ignition delay time by 1.7–2.2 times in comparison with the base composition. The
ignition delay time of the HEM sample with titanium diboride decreases slightly (by 10–25%)
relative to the ignition delay time of the base composition.
Keywords: high-energy material, boron, aluminum diboride, titanium diboride, ignition, acti-
Boron is one of the most promising metals for use
in solid propellants. The energy released during its ox-
idation is one of the highest in terms of unit mass and
maximum in terms of unit volume . However, its ap-
plication is signiﬁcantly complicated by the fact that,
during storage and combustion, a B
inert oxide layer
is formed on the surface of boron particles, and this ox-
ide layer prevents the penetration of an oxidizer  and
increases the ignition time and combustion time of par-
ticles [3, 4].
The study of the oxidation processes of boron is
predominantly carried out in two directions: oxidation
Tomsk Polytechnic University, Tomsk, 634050 Russia;
Tomsk State University, Tomsk, 634050 Russia.
Institute for Problems of Chemical and Energetic
Technologies, Siberian Branch, Russian Academy
of Sciences, Biisk, 659322 Russia.
of single particles [5, 6] and boron powders [7–10], as
well as oxidation of boron-containing composite solid
propellants [11, 12].
The mechanism of ignition and combustion of sin-
gle particles and boron powders in an oxidizing medium
has been studied in suﬃcient detail. The total exother-
mic reaction of oxidation on the surface of a particle
for pure boron in an oxygen medium (air) can be rep-
resented in the form 
2B + 2O → B
In the combustion of single boron particles, two
regimes are distinguished: low-temperature heteroge-
neous combustion and high-temperature homogeneous
gas-phase combustion . Considering the high boiling
point of boron oxide (1860
C), two additional stages can
be distinguished in low-temperature combustion: evap-
oration of a boron oxide ﬁlm (here the oxidation rate
of the reaction is determined by the diﬀusion rate of
the oxidant to the particle) and heterogeneous oxida-
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