Investigation of Al Nanopowders Produced by the Exploding Wire Method

• Autorzy: Sedoi V. , Osmonaliev M. , Chemezova L. , Volkova G. , Ivanov V. , Alekseev A.
• Konferencja: 9th Int. Seminar " New Trends in Research of Energetic Materials" University of Padubice, April 2006
• Języki publikacji: EN

Abstrakty

EN

The impetus for this research came from fundamental and applied questions connected with specified characteristics of Al nanopowders, theirs controlled syntheses and passivation, and their activity as high energetic ingredients in solid propulsion and in aluminum-water gels. Different conditions of powder syntheses by the exploding wire method and powder passivation were used: syntheses at low-pressure gases (Ar, N2, CO2) and passivation in atmospheric-pressure gases (air, N2, CO2). Investigations of particle sizes and morphology have been accomplished with a 125-kV transmission electron microscope. The specific surface area S has been determined by BET method. Particles are predominately spherical, BET surface area was of 15-40 m2/g. The composition and surface properties of nanopowders produced under various conditions were studied by mass-spectroscopy techniques at temperatures of 0-450 C, by electron and X-ray diffraction methods, and by elemental analysis methods. To determine activities of the powder samples in the combustion reactions, the Differential Thermal Analysis, Thermogravimetry, and reaction with water were conducted. Active metal contents have been determined from amount of impurities and hydrogen extracted in direct thermohydrolysis of nanopowders by distilled water at 60 C. Kinetics of gas evolution was determined therewith and shows two steps. Active aluminum content is within range of 16-80%. A composition of adsorbed gases and dynamics of desorption in vacuum have been investigated too. Correlation between conditions of nanopowder syntheses and specific surface and chemical activity in reaction with water and maximum oxidation degree have been determined. Keywords: nanopowders, characterization, passivation, oxidation, combustion

Słowa kluczowe

EN

nanopowders; characterization; passivation; oxidation; combustion

• Czasopismo: Central European Journal of Energetic Materials
• Rocznik: 2007
• Tom: Vol. 4, nr 1-2
• Strony: 17--30
• Opis fizyczny: Bibliogr. 12 poz.

Twórcy

autor

Sedoi V.

autor

Osmonaliev M.

autor

Chemezova L.

autor

Volkova G.

autor

Ivanov V.

autor

Alekseev A.

• Institute of High Current Electronics RAS, 634055, Tomsk, Russia,

Bibliografia

• [1] Chemezova L. I., Ivanov V. G., Ivanov Yu. F,, Osmonaliev M. N., Sedoi V. S., Sobolev I. A., Production of Nano-Al Powders by the Exploding Wire Method, Proc. International Conference on Combustion and Detonation, Zel 'dovich Memorial II, Moscow, paper WS1 -4, 2004, pp. 1-58.
• [2] De Luca L. T., Galfetti L., Severini R, Meda L., Marra G., Vorozhtsov A. B.,Sedoi V. S., Babuk V. A., Burning of Nano-Aluminized Composite RocketPropellants, Combustion, Explosion, and Shock Waves, 2005, 4/(6), 680-692.
• [3] Tepper F., Kaledin L., Combustion Characteristics of Kerosene Containing Alex® Nano-Aluminum, in: Combustion of Energetic Material(K.K. Kuo and L.T. De Luca Eds.), Beggel House Inc., New York, Wallingford 2002, pp. 195-206.
• [4] Palaszewski B., Metallized gelledpropellants: historical and future developments, in: Rocket Propulsion: Present and Future, (L.T. De Luca, Ed.), Grafiche GSS, Bergamo, Italy 2002, pp. 32(1-19)
• [5] Ivanov V. G., Leonov S. N., Savinov G. L., Glazkov O. V., Gavriluk O. V., Combustion of Mixtures of Ultrafine Aluminum With Gel-Like Water, Combustion, Explosion, and Shock Waves, 1994, 30, 569-570.
• [6] Ivanov V. G., Gavrilyuk O. V., Glazkov O. V., Safronov M. N., Specific Features of the Reactions Between Ultrafine Aluminum and Water in a Combustion Regime,ibid, 2000, 36, 213-219.
• [7] Sedoi V., Ivanov V., Ivanov Yu., Osmonaliev M., Larichev M., Laricheva O.,Synthesis by the Exploding Wire Method and Characterization of Nanoaluminum Powders with Tinorganic Coatings, Proc. the 36lh International Annual Conference of ICT, Karlsruhe, June 28-July 1, 2005, paper 98, pp. 1 -11.
• [8] Chemezova L., Ivanov V., Ivanov Yu., Osmonaliev M., Sedoi V., Sobolev L, Complex Research of Al Nanopowders Produced by the Exploding Wire Method, European Conference for Aero-Space Sciences, Moscow, July 4-7, 2005, pp. 5.3(1-7).
• [9] Ivanov Yu. F., Osmonaliev M. N., Sedoi V. S. et al., Production of Ultra-Fine Powders and Their Use in High Energetic Compositions, Propellants, Explos., Pyrotech., 2003, 28(6), 319-333.
• [10] Sedoi V. S., Ivanov Yu. F., Osmonaliev M. N., Study of Ultra-Fine Powders Produced by the Exploding Wire Method in: Novel Energetic Materials and Applications, (L.T. De Luca, L. Galfetti, R. A. Pesce-Rodrigues, Eds.), Grafiche GSS, Bergamo, Italy 2004, pp. 16 (1-10).
• [11] Sedoi V. S., Valevich V. V., Production of Highly Dispersed Metal Powders by Electrical Explosion in Reduced-Pressure Nitrogen, Tech. Phys. Lett., 1999, 25, 584-585.
• [12] Valevich V. V, Sedoi V. S., Ultrafine Powders Obtaining by the Fast Electrical Explosion, Russian Physics Journal, 1998, 6, 70-76.