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2014 | 19 | 2 |
Tytuł artykułu

Magnesium - an important component of high-energy compositions

Treść / Zawartość
Warianty tytułu
PL
Magnez - istotny składnik mieszanin wysokoenergetycznych
Języki publikacji
EN
Abstrakty
EN
Magnesium is a widely used component in high-energy compositions. Mixtures containing this metal can be found in show and military pyrotechnics, rocket propellants and various explosive masses. Magnesium containing compositions have high combustion temperature, which allows one to achieve the desired special effect. Two important stages in designing new high-energy mixtures, i.e. compatibility of substances and optimal composition, were described. The calculations were based on mixtures containing magnesium. In line with the standard STANAG 4147, using differential scanning calorimetry, compatibilities of mixtures of magnesium with octogen (HMX) and magnesium with hekzaazahekzanitroizowurzitane (CL-20) were examined. Magnesium is compatible with these nitroamines. An optimal composition which ensures the maximum combustion temperature and specific impulse was determined using the calculation programme isp2001. The optimum composition of the Mg : HMX composition burns at a lower temperature than the Mg : CL-20 mixture. The combustion temperature was 3493K for the former mixture and 3807K for the latter one. The specific impulse determined for both compositions was 273s. The specific impulse was established for mixtures with different shares of magnesium. The mixture containing in octogen reached the maximum specific impulse at 5% Mg, while the mixture containing CL-20 reached the highest specific impulse at 15% of this metal. The dependence of the specific impulse of rocket propellant containing polybutadiene with terminal hydroxyl groups (HTPB), ammonium perchlorate and magnesium was examined. The maximum value of the impulse increases with a decreasing amount of the binder. When another binder such as for poly(glycidyl azide) (GAP) was used, a reverse relationship was observed. The specific impulse increased with an increased binder content. The influence of various oxidants on the combustion temperature of pyrotechnic mixtures was defined. The highest combustion temperature was achieved for compositions with the magnesium content in the range of 20 to 45%. The effect on combustion temperature of the oxidants polytetrafluoroethylene, potassium chlorate and iron oxide was compared.
PL
Słowa kluczowe
Wydawca
-
Rocznik
Tom
19
Numer
2
Opis fizyczny
p.617-626,fig.,ref.
Twórcy
autor
  • Warsaw University of Technology, Warsaw, Poland
autor
  • Division of High Energetic Materials, Warsaw University of Technology, Warsaw, Poland
autor
  • Division of High Energetic Materials, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
Bibliografia
  • Baker S.B., Worthley L.I.G. 2002. The essentials of calcium, magnesium and phosphate metabolism: Part I. Physiology. Crit. Care Resuscit., 4: 301-306.
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  • Chemical compatibility of ammunition components with explosives and propellants (non nuclear applications). NATO STANAG 4147MMS (Edition1). 1992.
  • Cudziło S., Szala M., Huczko A., Bystrzejewski M. 2007. Combustion reactions of poly(carbon monofluoride), (CF)n, with different reductants and characterization of the products. Propell Explos Pyrot., 32(2): 149-154.
  • Cudziło S., Trzciński W., Maranda A. 1996. Detonation behaviour of HMX-based explosives containing magnesium and polytetrafluoroethylen. Energetic Materials-Technology, Manufacturing and Processing. Federal Republic of Germany.
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  • Lyadov V., Kuznetsov P. 1997. Composition for color-flame Bengal candle. Patent RU2087456 Pasternak K., Kocot J., Horecka. 2010. Biochemistry of magnesium. J. Elementol., 15(3): 601-616.
  • Singh H., Somayajulu M.R., Bhaskar Rao R. 1988. Selection of an igniter system for magnesium-based solid fuel rich. Propell Explos Pyrot., 13: 52-54.
  • Smith P. 2009. Surface-modified magnesium powders for use in pyrotechnic composition. Patent US2009025841 (A1).
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PL
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Typ dokumentu
Bibliografia
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Identyfikator YADDA
bwmeta1.element.agro-2968cde9-af00-47fd-a710-46acf0c31a81
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