Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.28 SNIP: 0.421 CiteScore™: 0.9

ISSN Imprimir: 2150-766X
ISSN On-line: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v9.i2.20
pages 133-146

SYNTHESIS AND CHARACTERIZATION OF COATED ENERGETIC MATERIALS USING A RESS-N SYSTEM

Jonathan T. Essel
Department of Mechanical and Nuclear Engineering, Pennsylvania State University, University Park, PA 16802
Andrew C. Cortopassi
The Pennsylvania State University, University Park, Pennsylvania, USA; The Aerospace Corporation, El Segundo, California, USA
Kenneth K. Kuo
Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802, USA

RESUMO

Coating nano-sized aluminum particles with an energetic material such as RDX has several unique advantages. The RDX coating can protect the aluminum surface from developing a growing oxide coating and can potentially improve performance by bringing the two components into closer contact than would conventional mixing. In this investigation, a custom-built rapid expansion of a supercritical solution with a nonsolvent (RESS-N) system was modified to coat nano-sized aluminum (ALEX®) particles. Particles were coated by entraining them in a solution of supercritical CO2 and RDX and then rapidly expanding the mixture through a nozzle. To achieve this, a particle entrainment vessel introduced ALEX® particles into the flow and the suspension was flown through a micro-orifice sapphire nozzle. The rapid expansion of the supercritical solution and the addition of ALEX® particles as nucleation sites created favorable conditions for the RDX to coat the ALEX® particles by heterogeneous nucleation. Tests were run at pre-expansion pressures up to 34.5 MPa and pre-expansion temperatures up to 353 K. Particles were successfully coated with RDX and collected by expanding the CO2 until it formed dry ice, which allowed for gravimetric collection. The successful coating of the particles was confirmed by field emission scanning electron microscopy (FE-SEM). Environmental scanning electron microscopy (ESEM) with energy disperse spectroscopy (EDS) was used to confirm that only RDX and ALEX® particles were collected and that the coating material was truly RDX.


Articles with similar content:

USING ORGANIC PHASE-CHANGE MATERIALS FOR ENHANCED ENERGY STORAGE IN WATER HEATERS: AN EXPERIMENTAL STUDY
Journal of Enhanced Heat Transfer, Vol.26, 2019, issue 2
Zhixiong Guo, Jifen Wang, Huaqing Xie, Le Cai, Kai Zhang
ENVIRONMENT-FRIENDLY COMPOSITE PROPELLANTS BASED ON AMMONIUM DINITRAMIDE
International Journal of Energetic Materials and Chemical Propulsion, Vol.18, 2019, issue 1
Claudio Tagliabue, Volker Weiser, Volker Gettwert, Sven Hafner, Sebastian Fischer
RDX/GAP-ETPE NANOCOMPOSITES FOR REMARKABLY REDUCED IMPACT SENSITIVITY
International Journal of Energetic Materials and Chemical Propulsion, Vol.15, 2016, issue 3
Baoyun Ye, Hequn Li, Jing-Yu Wang, Chongwei An, Wei Ji
FORMATION OF CONSOLIDATED NANOTHERMITE MATERIALS USING SUPPORT SUBSTRATES AND/OR BINDER MATERIALS
International Journal of Energetic Materials and Chemical Propulsion, Vol.11, 2012, issue 5
Chris J. Bulian, Jacek J. Swiatkiewicz, Deepak Kapoor, Jan A. Puszynski
BENEFITS OF THE RESOLV PROCESS IN FORMING POLYMER-COATED, ULTRAFINE RDX PARTICLES
International Journal of Energetic Materials and Chemical Propulsion, Vol.10, 2011, issue 6
Jonathan T. Essel, Anna R. Merritt, Joshua Carter, Kenneth K. Kuo, James H Adair