Solid Particles Dispersed In Solid Solution Or Matrix Patents (Class 149/17)
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Patent number: 11370927Abstract: In one embodiment, a method includes dispersing a plurality of particles in solution to form a dispersion and adding a stabilizing agent to the dispersion in an amount sufficient to cause the dispersion to exhibit one or more predetermined rheological properties. The particles in the dispersion are configured to complete a self-propagating and/or self-sustaining reaction upon initiation thereof. In another embodiment, a method includes depositing a material on a substrate. The material includes: a plurality of particles configured to complete a self-propagating and/or self-sustaining reaction upon initiation thereof, a solvent system, and one or more stabilizing agents.Type: GrantFiled: June 25, 2019Date of Patent: June 28, 2022Assignee: Lawrence Livermore National Security, LLCInventors: Kyle Sullivan, John M. Densmore, Eric Duoss, Alexander E. Gash, Joshua Kuntz, John Vericella
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Patent number: 10907079Abstract: In accordance with the present subject matter there is provided a hygroscopic homogeneous salt mixture including at least one alkali metal salt and a metal salt having water of crystallization. The subject matter also relates to a method for preparation of hygroscopic homogeneous salt mixture.Type: GrantFiled: May 24, 2016Date of Patent: February 2, 2021Assignee: HINDUSTAN PETROLEUM CORPORATION LTD.Inventors: Kanaparthi Ramesh, Kandoth Madathil Pramod, Peddy Venkat Chalapathi Rao, Nettem Venkateswarlu Choudary
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Patent number: 10889530Abstract: A pyrotechnic delayed-action composition and primer charge made of REACh-compliant components that are safe for humans and the environment. The delayed-action composition comprises at least one oxidant, at least one reducing agent, at least one filler and at least one mineral binder. The performance parameters thereof, in particular the burning time, can be set variably within a wide range. The composition clinkers on its own, thus preventing extinction at the front of the burning material even in dynamic conditions. The primer charge comprises at least one oxidant, at least one reducing agent, at least one filler and at least one mineral binder. It is easy to ignite and, due to its clinker structure, transfers its energy well to the compositions to be ignited. The delayed-action composition and the primer charge have the same structure and can easily be combined and adapted to each other in delayed-action units.Type: GrantFiled: May 18, 2018Date of Patent: January 12, 2021Assignee: Rheinmetall Waffe Munition GmbHInventors: Dirk Cegiel, Ernest Schulz, Julia Strenger
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Patent number: 10851318Abstract: The disclosure relates to an anti fouling composition including a metallic component comprising of at least one alkali metal salt and a non-metallic component and method for preparation of anti fouling composition. The disclosure also relates to a process of reducing fouling in reactors or furnaces using said composition.Type: GrantFiled: November 18, 2016Date of Patent: December 1, 2020Assignee: HINDUSTAN PETROLEUM CORPORATION LTDInventors: Kanaparthi Ramesh, Raman Ravishankar, Chinthalapati Siva Kesava Raju, Madala Sairamu, Priyanka Saha, Cheerladinne Venkateswarlu, Peddy Venkat Chalapathi Rao, Nettem Venkateswarlu Choudary
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Patent number: 10823115Abstract: A hybrid rocket motor includes a solid fuel element, and an oxidizer tank containing an oxidizer. The solid fuel element adjoins and at least partially defines a combustion chamber in which the solid fuel and the oxidizer are burned, to produce thrust from the hybrid rocket motor. The oxidizer tank is at least partially within the combustion chamber, and the entire oxidizer tank may be within the combustion chamber. The oxidizer tank may be protected by an insulating material, which may also serve as a structural material that contains the pressure of the oxidizer. The insulating material and the fuel material may both be polymer-based materials, although they may be different materials having different characteristics, for example including different additives to the same polymer material. The fuel element and the oxidizer tank may be made by additive manufacturing processes, for example by adding different materials in different locations.Type: GrantFiled: February 16, 2016Date of Patent: November 3, 2020Assignee: Raytheon CompanyInventors: Matt H. Summers, Jeremy C. Danforth
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Patent number: 10584076Abstract: An in-situ process for synthesizing highly pyrophoric foam materials using metal and carbon precursors wherein the precursors serve as foaming and activating agents to disperse and lock nano-sized metal particles within a rigid porous carbon matrix. The resulting carbon matrix is also pyrophoric.Type: GrantFiled: May 30, 2018Date of Patent: March 10, 2020Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: Zhaohua Luan, Kendall C. Mills, Lauren A. Morris, Christopher D. Haines
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Patent number: 10377090Abstract: In one embodiment, a material includes a plurality of particles, a solvent system and one or more stabilizing agents; the particles are configured to complete a self-propagating and/or self-sustaining reaction upon initiation thereof. In another embodiment, a method includes dispersing a plurality of particles in solution to form a dispersion and adding a stabilizing agent to the dispersion in an amount sufficient to cause the dispersion to exhibit one or more predetermined rheological properties; again, the particles in the dispersion are configured to complete a self-propagating and/or self-sustaining reaction upon initiation thereof. In still another embodiment, a method includes depositing a material on a substrate; the material includes a plurality of particles configured to complete a self-propagating and/or self-sustaining reaction upon initiation thereof, a solvent system and one or more stabilizing agents.Type: GrantFiled: October 8, 2013Date of Patent: August 13, 2019Assignee: Lawrence Livermore National Security, LLCInventors: Kyle Sullivan, John M. Densmore, Eric Duoss, Alexander E. Gash, Joshua Kuntz, John Vericella
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Patent number: 10109845Abstract: Provided here is a method for making a graphene-supported metal oxide monolith, comprising: providing a graphene aerogel monolith; immersing said graphene aerogel monolith in a solution comprising at least one metal salt to form a mixture; curing said mixture to obtain a gel; optionally, heating said gel to obtain a graphene-supported metal oxide monolith.Type: GrantFiled: November 1, 2016Date of Patent: October 23, 2018Assignee: Lawrence Livermore National Security, LLCInventors: Marcus A. Worsley, Theodore F. Baumann, Juergen Biener, Monika M. Biener, Yinmin Wang, Jianchao Ye, Elijah Tylski
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Patent number: 10087116Abstract: The invention relates generally to burn rate modifiers, plasticizers and propellants comprising a burn rate modifier and/or a plasticizer. The invention also relates to methods of producing a propellant comprising a burn rate modifier and/or a plasticizer as well as an ammunition cartridge comprising the propellant. The burn rate modifier and/or plasticiser comprises a compound of formula (1) (Formula (1)) and the propellant comprises a compound of formula 1 and an energetic material.Type: GrantFiled: September 24, 2014Date of Patent: October 2, 2018Assignee: Thales Australia LimitedInventors: Garry Warrender, Ashley Jones
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Patent number: 9636533Abstract: A metal-carbonyl-containing fire extinguishing composition comprises metal carbonyl complexes. The fire extinguishing composition uses a pyrotechnic agent as a heat source and a power source. A high temperature in combustion of the pyrotechnic agent enables the fire extinguishing composition to decompose or react under heat; produced fire extinguishing substances are sprayed out together with the pyrotechnic agent, thereby achieving a fire extinguishing objective. In the fire extinguishing composition, by selecting preferable components and optimizing contents of the components, an optimum formula of the fire extinguishing composition is determined, thereby greatly improving the efficacy of the fire extinguishing composition. In addition, efficacies of the components in the fire extinguishing composition are fully utilized, which improves an effective utilization rate of the fire extinguishing composition.Type: GrantFiled: August 16, 2012Date of Patent: May 2, 2017Assignee: XI'AN WESTPACE FIRE TECHNOLOGY CO., LTDInventors: Wei Tian, Tengfei Zhai, Tao Ji
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Publication number: 20150101719Abstract: An energetic material comprising an elemental fuel, an oxidizer or other element, and a carbon nanofiller or carbon fiber rods, where the carbon nanofiller or carbon fiber rods are substantially homogeneously dispersed in the energetic material. Methods of tailoring the electrostatic discharge sensitivity of an energetic material are also disclosed.Type: ApplicationFiled: October 10, 2013Publication date: April 16, 2015Applicant: Battelle Energy Alliance, LLCInventors: Michael A. Daniels, Ronald J. Heaps, Ronald S. Wallace, Michelle L. Pantoya, Eric S. Collins
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Publication number: 20140326370Abstract: For production of a propellant charge powder, especially for medium and large calibers, in a process in which the solid is incorporated together with a liquid in a mixing and drying process into the channels of a granular green material and compacted therein to form a plug, the solid, under otherwise identical process conditions, is set within a setting range of >0-0.5% by weight based on the weight of the granular green material. For more significant lowering of the maximum pressure within an upper temperature range and for more significant raising of the maximum pressure within a lower temperature range of the application temperature range, an increased amount of solid is used. The solid is a substance whose melting point is at least 10° C., especially 20° C., above a maximum use temperature of the propellant charge powder and which is inert toward the granular green material. Since the plug consists virtually exclusively of inert material, a high ballistic stability is achieved.Type: ApplicationFiled: March 28, 2012Publication date: November 6, 2014Applicant: NITROCHEMIE ASCHAU GMBHInventors: Beat Vogelsanger, Bruno Ossola, Alexander Huber, Christian Wagner, Oliver Hampel
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Patent number: 8778105Abstract: The invention concerns copper azide containing carbon nanotubes. The invention also concerns methods of producing such nanotubes by placing CuO nanoparticles within carbon nanotubes to produce CuO-containing carbon nanotubes, contacting CuO-containing carbon nanotubes with hydrogen to produce reduced nanotubes; and contacting the reduced nanotubes with hydrazoic acid to produce copper azide containing carbon nanotubes.Type: GrantFiled: August 28, 2013Date of Patent: July 15, 2014Assignee: The United States of America as Represented by the Secretary of the NavyInventors: Yury Gogotsi, Valarie Pelletier, Farhad Forohar, Magdy Bichay
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Patent number: 8721813Abstract: Bimetallic alloys prepared in a ball milling process, such as iron nickel (FeNi), iron palladium (FePd), and magnesium palladium (MgPd) provide in situ catalyst system for remediating and degrading nitro explosive compounds. Specifically, munitions, such as, 2,4,6-trinitrotoluene (TNT), cyclo-1,3,5-trimethylene-2,4,6-trinitramine (RDX), nitrocellulose and nitroglycerine that have become contaminants in groundwater, soil, and other structures are treated on site to remediate explosive contamination.Type: GrantFiled: January 9, 2012Date of Patent: May 13, 2014Assignee: University of Central Florida Research Foundation, Inc.Inventors: Christian Clausen, III, Cherie Geiger, Michael Sigman, Rebecca Fidler
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Patent number: 8696838Abstract: A method of manufacture of foamed celluloid molded products, involving three steps for the manufacture of higher density (0.7 to 1.25 gm/cc) foamed celluloid products or simple geometry lower density (0.2 to 0.7 gm/cc) foamed celluloid products, and four steps for the manufacture of lower density foamed celluloid products of any geometry. The three step process involving: (1) providing small, uniform, pieces of celluloid; (2) presoaking the pieces in a physical blowing agent (PBA) under pressure; and (3) foaming at raised temperature a controlled quantity of the presoaked pieces in a mold—to obtain the desired shape and density. For a lower density foamed celluloid product, of any moldable geometry, the steps are to: (1) small pieces of celluloid, that (2) have been presoaked in a PBA, are (3) pre-expanded to an intermediate density, and then (4) foam the desired lower density foamed product in a mold at raised temperature.Type: GrantFiled: November 30, 2011Date of Patent: April 15, 2014Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: Niloufar Faridi, Linjie Zhu, Ming-Wan Young, Costas G. Gogos, Fei Shen, Elbert Caravaca, Mohamed Elalem, Viral Panchal, Dale Conti
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Patent number: 8641843Abstract: The present invention provides a simulant material comprising a primary explosive and a carrier.Type: GrantFiled: January 8, 2009Date of Patent: February 4, 2014Assignee: Rafael, Advanced Defense Systems Ltd.Inventors: Shulman Hagit, Yael Cohen-Arazi, Edith Sokol, Moshit Yaskin-Harush
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Patent number: 8617327Abstract: The present invention is an electrically controlled propellant comprising a binder, an oxidizer, and a cross-linking agent. The boric acid (the cross-linking agent) has been found to function as a cross-linking agent for the high molecular binder used to make the propellant, thereby improving the composition's ability to withstand combustion without melting. The present invention also may include 5-aminotetrazole (5-ATZ) as a stability-enhancing additive. The binder of the present invention may include polyvinylalcohol (PVA) and/or the co-polymer of polyvinylalcohol/polyvinylamine nitrate (PVA/PVAN).Type: GrantFiled: October 23, 2012Date of Patent: December 31, 2013Assignee: Digital Solid State Propulsion LLCInventors: Arthur Katzakian, Charles Grix
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Patent number: 8613821Abstract: Provided is a basic metal nitrate suitable as an oxidizing agent for a gas generating agent, which is a basic metal nitrate having a good thermal stability and meeting at least one requirement of the following (a) to (d): (a) a particle diameter of 0.5 to 40 ?m; (b) a degree of crystallinity having 0.4 deg or less of a half band width of the peak in the X-ray analysis; (c) an initiation temperature of weight loss being 220° C. or higher according to TG-DTA analysis; and (d) an impurity content of 1,000 ppm or less based on Na atom. Further provided is a gas generating composition which has a low toxicity, a high burning rate and a low combustion temperature and which is used in a gas generator for an air bag. The gas generating composition comprises (a) tetrazole derivatives, guanidine derivatives or a mixture thereof, (b) a basic metal nitrate and (c) a binder and/or a slag-forming agent.Type: GrantFiled: September 8, 2010Date of Patent: December 24, 2013Assignee: Daicel Chemical Industries, Ltd.Inventors: Xingxi Zhou, Kazuyuki Matsuoka, Jianzhou Wu, Yo Yamato, Takeshi Takahori, Kaoru Yamazaki
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Patent number: 8512490Abstract: The invention provides methods for making homogeneous metal oxide nanoenergetic composites. A method of the invention forms a metal oxide nanostructure via a sol-gel process with surfactant templating. Metal nanoparticles are introduced into the metal oxide nanostructure via wet impregnation.Type: GrantFiled: September 7, 2012Date of Patent: August 20, 2013Assignee: The Curators of the University of MissouriInventors: Shubhra Gangopadhyay, Daniel Tappmeyer, Andrey Bezmelnystin, Rajagopalan Thiruvengadathan, Rajesh Shende, Bhushan Mehendale, Steve Apperson, Sved Barizuddin, Keshab Gangopadhyay
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Patent number: 8506734Abstract: A process for making metal-organic frameworks and metal-organic frameworks having host-guest complexes of either liquid energetics, solid energetics, or solid oxidizers.Type: GrantFiled: July 14, 2010Date of Patent: August 13, 2013Assignee: The United States of America as Represented by the Secretary of the NavyInventors: Andrew P. Nelson, Nirupam J. Trivedi
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Patent number: 8460575Abstract: The invention is directed to a solid, porous material, suitable for generating nitrogen gas, said material having a porosity of 20 to 75 vol. %, and a composition comprising, based on the weight of the material of 60 to 90 wt. % of sodium azide, 0.1 to 20 wt. % of an inert chemical coolant based on at least one inorganic salt having a heat capacity of at least 1400 J/K/kg, 0.1 to 20 wt. % of modifying agent selected from metal oxides and metal carbonates, and a binder, selected from the group consisting of at least one alkali metal silicate, preferably waterglass, or a poly-tetrazole, in an amount of between 3 and 15 wt. %.Type: GrantFiled: December 5, 2008Date of Patent: June 11, 2013Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNOInventor: Laurens Daniël van Vliet
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Patent number: 8409377Abstract: Combustible structural composites and methods of forming same are disclosed. In an embodiment, a combustible structural composite includes combustible material comprising a fuel metal and a metal oxide. The fuel metal is present in the combustible material at a weight ratio from 1:9 to 1:1 of the fuel metal to the metal oxide. The fuel metal and the metal oxide are capable of exothermically reacting upon application of energy at or above a threshold value to support self-sustaining combustion of the combustible material within the combustible structural composite. Structural-reinforcing fibers are present in the composite at a weight ratio from 1:20 to 10:1 of the structural-reinforcing fibers to the combustible material. Other embodiments and aspects are disclosed.Type: GrantFiled: July 28, 2011Date of Patent: April 2, 2013Assignee: Battelle Energy Alliance, LLCInventors: Michael A. Daniels, Ronald J. Heaps, Eric D. Steffler, W. David Swank
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Patent number: 8382921Abstract: An apparatus for compressing powders and the like including a head assembly with a distensible elastic platen mounted in a chambered header plate containing a pressurizing fluid. The elastic platen distends in response to the pressurizing fluid. Further, a base assembly includes a rigid platen mounted in a base plate. The rigid platen includes a face with at least one cavity, into which is added powder to be compressed. The elastic platen is aligned with the rigid platen, and during compression, the two platens may be held firmly in contact. The pressurizing fluid pumped into the head assembly causes the elastic platen to deform forming a single distention per cavity. The distensions compress the powder to an optimal density. The apparatus safely and easily compact multiple small samples of explosives and the like into miniature charges.Type: GrantFiled: September 11, 2008Date of Patent: February 26, 2013Assignee: The United States of America as represented by the Secretary of the NavyInventors: Gerald R. Laib, Michael Beggans
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Patent number: 8372224Abstract: The present inventions provide methods of manufacturing methods for case metallic materials for munitions that have high enthalpic energy release and controlled fragmentation and breakup enabling fragment speeds up to twice what is otherwise possible in explosively driven metal systems, and munitions made by such methods. Embodiments of the invention involve the thixotropic processing of energetic materials such as aluminum together with high density materials such as tantalum or tungsten to achieve material microstructures with a bulk density equivalent to steel, but with the energy release potential of materials such as finely dispersed aluminum powders.Type: GrantFiled: March 12, 2010Date of Patent: February 12, 2013Assignee: B6 Sigma, Inc.Inventors: Vivek R Dave, Mark J Cola, Robert E Swanson, Daniel Hartman
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Patent number: 8361258Abstract: A precursor composition of a reactive material that comprises a metal material and an energetic material, such as at least one oxidizer or at least one class 1.1 explosive. The metal material defines a continuous phase at a processing temperature of the precursor composition and the energetic material is dispersed therein. The metal material may be a fusible metal alloy having a melting point ranging from approximately 46° C. to approximately 250° C. The fusible metal alloy may include at least one metal selected from the group consisting of bismuth, lead, tin, cadmium, indium, mercury, antimony, copper, gold, silver, and zinc. The reactive composition may have a density of greater than approximately 2 g/cm3. The reactive composition may also include a polymer/plasticizer system.Type: GrantFiled: October 20, 2011Date of Patent: January 29, 2013Assignee: Alliant Techsystems Inc.Inventors: Benjamin N. Ashcroft, Daniel B. Nielson, Daniel W. Doll
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Patent number: 8317952Abstract: The present invention is an electrically controlled propellant comprising a binder, an oxidizer, and a cross-linking agent. The boric acid (the cross-linking agent) has been found to function as a cross-linking agent for the high molecular binder used to make the propellant, thereby improving the composition's ability to withstand combustion without melting. The present invention also may include 5-aminotetrazole (5-ATZ) as a stability-enhancing additive. The binder of the present invention may include polyvinylalcohol (PVA) and/or the co-polymer of polyvinylalcohol/polyvinylamine nitrate (PVA/PVAN).Type: GrantFiled: April 13, 2007Date of Patent: November 27, 2012Assignee: Digital Solid State Propulsion, LLCInventors: Arthur Katzakian, Charles Grix
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Publication number: 20120291930Abstract: A cast reactive metal body that can be used as weapon cases is offered. It is cast with aluminum or aluminum alloys with small particles and/or fibers of metals of high density such as molybdenum, tungsten or hafnium. Aluminum alloys are those that can get easily ignited when heated and burn fast afterwards in particulate forms. Metals that react intermetallically with aluminum are excluded. The particles and fibers are of the size between a few microns and a few hundreds of microns in diameter. The length of the fibers is longer than the diameter. The weight percentage of aluminum and/or aluminum alloys range from 10 to 90 percent and the weight percentage of heavy metal particles/fibers ranges from 90 to 10 percent. Other inert materials such as ceramic particles can be added in small amounts.Type: ApplicationFiled: May 20, 2011Publication date: November 22, 2012Inventor: Kibong Kim
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Patent number: 8293040Abstract: The invention provides homogeneous mesoporous metal oxide nanoenergetic composites. A composite of the invention has a regular and uniform nanostructure of metal oxide, which is structured by a surfactant. Metal fuel nanoparticles are homogenously distributed through the regular and uniform nanostructure. The invention further provides methods for making homogeneous metal oxide nanoenergetic composites. A method of the invention forms a metal oxide nanostructure via a sol-gel process with surfactant templating. Metal nanoparticles into the metal oxide nanostructure via wet impregnation.Type: GrantFiled: December 11, 2007Date of Patent: October 23, 2012Assignee: The Curators of the University of MissouriInventors: Shubhra Gangopadhyay, Daniel Tappmeyer, Andrey Bezmelnytsin, Rajagopalan Thiruvengadathan, Rajesh Shende, Bhusban Mehendale, Steven Apperson, Syed Barizuddin, Keshab Gangopadhyay
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Patent number: 8257520Abstract: An ordered energetic composite structure according to one embodiment includes an ordered array of metal fuel portions; and an oxidizer in gaps located between the metal fuel portions. An ordered energetic composite structure according to another embodiment includes at least one metal fuel portion having an ordered array of nanopores; and an oxidizer in the nanopores. A method for forming an ordered energetic composite structure according to one embodiment includes forming an ordered array of metal fuel portions; and depositing an oxidizer in gaps located between the metal fuel portions. A method for forming an ordered energetic composite structure according to another embodiment includes forming an ordered array of nanopores in at least one metal fuel portion; and depositing an oxidizer in the nanopores.Type: GrantFiled: February 24, 2009Date of Patent: September 4, 2012Assignee: Lawrence Livermore National Security, LLCInventors: Alexander E. Gash, Thomas Yong-Jin Han, Donald J. Sirbuly
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Patent number: 8257523Abstract: An apparatus and process for making thermite compositions. The process includes providing a fuel-based slurry and at least one oxidizer-based slurry, formulating combination of fuel-based slurry and oxidizer-based slurry in a solvent to a desired energetic dose depending on nanocomposites' use, circulating the fuel-based slurry/oxidizer-based slurry combination in a mixing device operating semi-continuously during mixing and dispensing cycles forming a homogeneous mixed slurry, agitating ultrasonically or by high shear rate mixers the mixed slurry, and drying of the mixed slurry forming compact structures.Type: GrantFiled: March 30, 2010Date of Patent: September 4, 2012Assignee: The United States of America as represented by the Secretary of the NavyInventors: Jan A. Puszynski, Jacek J. Swiatkiewicz
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Patent number: 8197619Abstract: A process for making metal-organic frameworks and metal-organic frameworks having host-guest complexes of either liquid energetics, solid energetics, or solid oxidizers.Type: GrantFiled: July 14, 2010Date of Patent: June 12, 2012Assignee: The United States of America as represented by the Secretary of the NavyInventors: Andrew P. Nelson, Nirupam J. Trivedi
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Patent number: 8182711Abstract: The present invention is directed to pyrotechnic aerosol fire suppression compositions that burn rapidly, but coolly. The rapid burning of the compositions of the present invention produces a voluminous flame-suppressive aerosol that is useful in suppressing and/or extinguishing both small and large fires. The compositions of the invention contain at least one oxidizer and a fuel component comprising at least one organic acid salt, which combination produces a rapid burning composition that burns at low temperatures with little or no flame and have a low heat of combustion.Type: GrantFiled: March 8, 2011Date of Patent: May 22, 2012Assignee: Goodrich CorporationInventors: Philip L. Posson, Mark L. Clark
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Patent number: 8172964Abstract: A method for creating a pyrophoric material according to one embodiment includes thermally activating a carbon foam for creating micropores therein; contacting the activated carbon foam with a liquid solution comprising a metal salt for depositing metal ions in the carbon foam; and reducing the metal ions in the foam to metal particles. A pyrophoric material in yet another embodiment includes a pyrophoric metal-carbon foam composite comprising a carbon foam having micropores and mesopores and a surface area of greater than or equal to about 2000 m2/g, and metal particles in the pores of the carbon foam. Additional methods and materials are also disclosed.Type: GrantFiled: December 5, 2008Date of Patent: May 8, 2012Assignee: Lawrence Livermore National Security, LLCInventors: Alexander E. Gash, Joe H. Satcher, Jr., Randall L. Simpson, Theodore F. Baumann, Marcus A. Worsley
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Publication number: 20120060983Abstract: A delay composition for a detonator or delay device. The composition comprising a mixture of silicon and barium sulfate, and an amount of red lead in the range of about 3 to 15%, and preferably 6 to 12%, by weight of the mixture. The invention also relates to a delay element comprising a rigid metal tube containing the delay composition, and a delay device incorporating the delay element.Type: ApplicationFiled: November 22, 2011Publication date: March 15, 2012Applicant: ORICA EXPLOSIVES TECHNOLOGY PTY LTD.Inventor: Réjean Aubé
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Patent number: 8075715Abstract: A precursor composition of a reactive material that comprises a metal material and an energetic material, such as at least one oxidizer or at least one class 1.1 explosive. The metal material defines a continuous phase at a processing temperature of the precursor composition and the energetic material is dispersed therein. The metal material may be a fusible metal alloy having a melting point ranging from approximately 46° C. to approximately 250° C. The fusible metal alloy may include at least one metal selected from the group consisting of bismuth, lead, tin, cadmium, indium, mercury, antimony, copper, gold, silver, and zinc. The reactive composition may have a density of greater than approximately 2 g/cm3. The reactive composition may also include a polymer/plasticizer system.Type: GrantFiled: January 5, 2007Date of Patent: December 13, 2011Assignee: Alliant Techsystems Inc.Inventors: Benjamin N. Ashcroft, Daniel B. Nielson, Daniel W. Doll
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Patent number: 8007607Abstract: Combustible structural composites and methods of forming same are disclosed. In an embodiment, a combustible structural composite includes combustible material comprising a fuel metal and a metal oxide. The fuel metal is present in the combustible material at a weight ratio from 1:9 to 1:1 of the fuel metal to the metal oxide. The fuel metal and the metal oxide are capable of exothermically reacting upon application of energy at or above a threshold value to support self-sustaining combustion of the combustible material within the combustible structural composite. Structural-reinforcing fibers are present in the composite at a weight ratio from 1:20 to 10:1 of the structural-reinforcing fibers to the combustible material. Other embodiments and aspects are disclosed.Type: GrantFiled: September 19, 2008Date of Patent: August 30, 2011Assignee: Battelle Energy Alliance, LLCInventors: Michael A. Daniels, Ronald J. Heaps, Eric D Steffler, William D. Swank
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Patent number: 7985310Abstract: This invention relates to granules comprising a homogenous mixture of metal flakes and/or metal powder and metal oxide powder, and a binder. The invention also relates to a process for producing such granules. The process includes the step of forming a mixture of metal flakes and/or metal powder and metal oxide powder, forming the mixture into a homogenous blend, adding the blend, together with a binder, to a granulator to form granules, and drying the granules. Granules so formed containing aluminum, aluminum oxide and iron oxide find particular use as sensitizers and energizers in explosives compositions.Type: GrantFiled: May 12, 2010Date of Patent: July 26, 2011Inventor: Denis Gordon Verity
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Patent number: 7972453Abstract: A thermobaric munition including a composite explosive material, the composite explosive material having a high-explosive composition, and a detonable energetic material dispersed within the high-explosive composition, the detonable energetic material in the form of a thin film, the thin film having at least one layer composed at least in part by a reducing metal and at least one layer composed at least in part by a metal oxide. A related method includes tailoring the blast characteristics of high explosive composition to match a predetermined time-pressure impulse, the method including disbursing a detonable energetic material having a preselected reaction rate within the high-explosive composition, the detonable energetic material in the form of a thin film, the thin film having at least one layer composed at least in part by a reducing metal and at least one layer composed at least in part by a metal oxide.Type: GrantFiled: June 13, 2006Date of Patent: July 5, 2011Assignee: Lockheed Martin CorporationInventors: Edward W. Sheridan, George D. Hugus, George W. Brooks
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Patent number: 7955453Abstract: A process for manufacturing gradient structures uses multiple jet-spraying mechanisms to form layers of distinct precursors into a gradient composition.Type: GrantFiled: September 15, 2006Date of Patent: June 7, 2011Assignee: The United States of America as represented by the Secretary of the NavyInventors: John M. Kelley, Raafat H. Guirguis
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Patent number: 7942989Abstract: An initiator explosive for detonating a second explosive that includes nanocrystalline silicon containing a plurality of pores and a solid state oxidant disposed within said pores.Type: GrantFiled: December 9, 2003Date of Patent: May 17, 2011Assignee: The Regents of the University of CaliforniaInventors: Michael J. Sailor, Frederic V. Mikulec, Joseph D. Kirtland
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Patent number: 7942988Abstract: A shaped, flexible fuel and energetic system is presented. The shaped, flexible fuel comprises at least one polymeric binding material and porous silicon particles dispersed throughout the polymeric binding material. The porous silicon particles are prepared from a metallurgical grade silicon powder. The shaped, flexible fuel preferably includes shapes such as: an article, a film, a wire and a tape. The energetic system comprises the shaped, flexible fuel portion used alone or in combination with at least one oxidizer.Type: GrantFiled: May 8, 2008Date of Patent: May 17, 2011Assignee: Vesta Research, Ltd.Inventors: Shanthi Subramanian, Declan Farrell, Santosh Y. Limaye
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Patent number: 7931761Abstract: Disclosed is a gas generating polymer compound that when irradiated with light or other radiation sources makes a solid to gas phase transition due to chemically catylized degradation, irradiative degradation or both. This provides a low cost, stable and easily manufactured means of gas production. Also disclosed are possible uses for the gas generator such as a low cost micro thruster.Type: GrantFiled: March 30, 2009Date of Patent: April 26, 2011Inventors: Mark Banister, Stephen Banister
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Patent number: 7927439Abstract: The invention is a method and a composition where, on command, a distributed number of micron size voids are created in an energetic material. The voids are hot spots, which change the shock compression sensitivity of the explosive composition by a factor of 2 to 10. The composition contains SMART materials, which are magnetostrictive materials having a large magnetostrictive coefficient, and in a matter of microseconds following the application of an external electromagnetic field, each of the magnetostrictive nano-structures expands and contracts forming a void, where the sum of the voids increases the shock compression sensitivity of the composition.Type: GrantFiled: August 8, 2008Date of Patent: April 19, 2011Assignee: The United States of America as represented by the Secretary of the NavyInventors: Jerry W. Forbes, Chak P. Wong, G. William Lawrence
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Patent number: 7906034Abstract: The present invention is directed to pyrotechnic aerosol fire suppression compositions that burn rapidly, but coolly. The rapid burning of the compositions of the present invention produces a voluminous flame-suppressive aerosol that is useful in suppressing and/or extinguishing both small and large fires. The compositions of the invention contain at least one oxidizer and a fuel component comprising at least one organic acid salt, which combination produces a rapid burning composition that burns at low temperatures with little or no flame and have a low heat of combustion.Type: GrantFiled: October 1, 2007Date of Patent: March 15, 2011Assignee: Goodrich CorporationInventors: Philip L. Posson, Mark L. Clark
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Patent number: 7896989Abstract: Methods of making cross sectional, functionally-graded munitions propellants exhibiting various distributions of particle concentrations and burn rate, including having a fast burning core and slower burning outer layer(s). Unlike prior art methods of preparing such munitions, propellants prepared according to our inventive method(s) may be performed substantially as a single extrusion step or as a few processing steps, without requiring the time, expense and/or difficulties that characterized familiar, laminating methods and methods which use multiple extruders. Our inventive method advantageously employs a demixing phenomenon that, prior to our inventive application and teaching, has been considered quite undesirable in the preparation of propellants where uniformity and well-mixedness have been propellant attributes widely sought after.Type: GrantFiled: February 11, 2005Date of Patent: March 1, 2011Assignee: The United States of America as represented by the Secretary of the ArmyInventors: David Fair, Dilhan M. Kalyon, Sam Moy, Leon R. Manole
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SYSTEMS AND METHODS FOR CHEMICAL AND/OR MECHANICAL REMEDIATION OF NITRO COMPOUNDS AND NITRATE ESTERS
Publication number: 20110041718Abstract: Systems and methods for chemoremediation or mechanical destruction of undetonated explosive materials. An explosive apparatus contains an explosive material in close proximity to a chemical reagent selected for its chemoremediative properties. A barrier is interposed between the explosive material and the chemical reagent to delay the chemoremediation of the explosive material. Alternatively a water expandable material may be incorporated into the explosive material, whereby upon exposure to moisture the water absorbing material will expand sufficiently to fragment the explosive material into initiation insensitive particles. Initiation insensitivity is achieved by incorporation of water, which acts as a desensitizing agent as well as fragmenting the explosive material into particles sufficiently small that they are below the critical diameter for explosive initiation.Type: ApplicationFiled: June 24, 2010Publication date: February 24, 2011Applicant: Maxamcorp Holding S.L.Inventors: Carl Hermanus Lubbe, Delana Harris, Jose Manuel Botija González, Fernando María Beitia Gómez De Segura -
Publication number: 20110030858Abstract: A gas generating composition exhibiting good slag forming ability is provided. The gas generating composition includes a fuel ranging from 10 to 60% by mass, an oxidizing agent ranging from 10 to 70% by mass, and a cooling agent (other than iron oxide) ranging from 1 to 20% by mass. The cooling agent has a volume mean diameter (D50) of 10 to 70 ?m and a volume mean diameter at cumulative of 10% (D10) of equal to or greater than 5 ?m. The cooling agent acts to decrease the combustion temperature and improve slag forming ability.Type: ApplicationFiled: April 8, 2009Publication date: February 10, 2011Inventors: Jianzhou Wu, Shogo Tomiyama, Yoji Fujisaki
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Patent number: 7879166Abstract: The present invention relates generally to carbon nanotubes, and more particularly to the interaction of single wall carbon nanotubes with hydrazoic acid to introduce energetic azide groups into the nanotubes to form activated carbon nanotubes.Type: GrantFiled: October 31, 2007Date of Patent: February 1, 2011Assignee: The United States of America as represented by the Secretary of the NavyInventors: Farhad Forohar, Magdy Bichay
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Publication number: 20100326574Abstract: Provided is a basic metal nitrate suitable as an oxidizing agent for a gas generating agent, which is a basic metal nitrate having a good thermal stability and meeting at least one requirement of the following (a) to (d): (a) a particle diameter of 0.5 to 40 ?m; (b) a degree of crystallinity having 0.4 deg or less of a half band width of the peak in the X-ray analysis; (c) an initiation temperature of weight loss being 220° C. or higher according to TG-DTA analysis; and (d) an impurity content of 1,000 ppm or less based on Na atom. Further provided is a gas generating composition which has a low toxicity, a high burning rate and a low combustion temperature and which is used in a gas generator for an air bag. The gas generating composition comprises (a) tetrazole derivatives, guanidine derivatives or a mixture thereof, (b) a basic metal nitrate and (c) a binder and/or a slag-forming agent.Type: ApplicationFiled: September 8, 2010Publication date: December 30, 2010Inventors: Xingxi Zhou, Kazuyuki Matsuoka, Jianzhou Wu, Yo Yamato, Takeshi Takahori, Kaoru Yamazaki
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Patent number: 7837813Abstract: Stone Wales defect pairs in a carbon nanostructure are used to store energy. Energy is released by a chain reaction of phonons disrupting the defect pairs to generate more phonons until the lattice returns to its original hexagonal form and the energy is released in the form of lattice vibrations. Devices may be configured as a battery to release electrical energy in a controlled manner or as an explosive to release energy in an uncontrolled manner.Type: GrantFiled: May 28, 2009Date of Patent: November 23, 2010Assignee: Raytheon CompanyInventors: Delmar L. Barker, William R. Owens