Abstract: Ceramic materials based on solid solutions of chromium diboride (CrB.sub.2) nd niobium diboride (NbB.sub.2).

Abstract: A Si.sub.3 N.sub.4 reinforced aluminosilicate ceramic composite made ofA. from about 5 to about 40 weight percent of Si.sub.3 N.sub.4 reinforcem material;B. from about 15 to about 35 weight percent of the recrystalization products formed from a molten glass composed of(1) from about 8 to about 16 weight percent of Al.sub.2 O.sub.3,(2) from about 14 to about 45 mole percent of an alkaline earth oxide selected form the group consisting of BaO, SrO, and mixtures thereof, and(3) SiO.sub.2 being the remainder of the molten glass,wherein the recrystallization products are formed from the molten glass when the ceramic composite is cooled down after firing;C. the remainder of the composite being monoclinic BaO.Al.sub.2 O.sub.3.2SiO.sub.2 (BAS), monoclinic SrO.Al.sub.2 O.sub.3.2SiO.sub.2 (SAS), or a monoclinic solid solution of BAS and SAS.

Abstract: A breaching device comprising a regular polygon structure in which identi, rectangular, concave flying plate devices (shape charges) form the sides of the polygon, and a strong, rigid, lightweight structure holds the flying plate devices in position. The flying plate devices are identical and comprise a copper or copper alloy plate having a uniform thickness and a concave front face, a uniform elastomeric material layer attached to and covering the back convex surface of the metal plate, and a uniform layer of high energy plastic-bonded explosive covering the back of the layer of elastomeric material. The flying plate devices are oriented so that when simultaneously fired they fly in trajectories that are parallel to each other and perpendicular to the plane of the polygon.

Abstract: A ceramic material made from raw coal fly ash or raw municipal solid waste fly ash and (1) sodium tetraborate or (2) a mixture of sodium tetraborate and a calcium containing material that is triple superphosphate, lime, dolomitic lime, or mixtures thereof.

Abstract: A composite propellant composition and process are disclosed for reducing e reactive violence during cook-off and to improve the performance of a potassium perchlorate/ammonium perchlorate propellant composition wherein 0.25-2.0% by weight, of iron oxide replaces 0.25-2.0% by weight, of potassium perchlorate in the composition.

Abstract: A light weight zinc electrode made of(1) a mat of nickel metal coated graphite fibers; and(2) a composite material of zinc active material and a hydrogel dispersed a solid, impervious, inert polymer matrix,wherein the composite material surrounds the individual nickel metal coated graphite fibers of the sintered mat which support the composite material and provide paths of electrical conductivity throughout the composite material.

Abstract: A supercritical water oxidation reactor includes a vessel with an interior urface, two cooling sections, a heat exchanger, an oxygenating section, a pump, and a trap. The interior surface of the vessel has a corrosion-resistant, artificial ceramic or diamond-like coating. The artificial diamond coating is thin and crystal-like in structure. The heat exchanger is located between the two cooling sections. The heat exchanger and the two cooling sections surround the exterior of the vessel. The oxygenating section comprises a porous cylindrical baffle positioned within the vessel. The porous baffle transfers oxygen, hydrogen peroxide, or other oxygenating substances to an aqueous hazardous waste introduced into the reactor.In accordance with another aspect of the invention, the oxygenating section includes a shaft having a helical extension. The shaft has a corrosion-resistant, artificial diamond or diamond-like coating on its outer surface.

Abstract: A pentafluorosulfanylnitramide salt that is ammonium pentafluorosulfanylnamide, sodium pentafluorosulfanylnitramide, potassium pentafluorosulfanylnitramide, lithium pentafluorosulfanylnitramide, or cesium pentafluorosulfanylnitramide. These salts are useful as energetic oxidizers in explosives and propellants.

Abstract: A process for growing single crystal epitaxial BaF.sub.2 layers on gallium arsenide substrates by slowly reacting BaF.sub.2 vapor with the clean, hot GaAs substrate at 500.degree. to 700.degree. C. in high vacuum until a uniform, thin (.about.12.ANG.) layer of reaction product is formed and then vapor depositing BaF.sub.2 onto the reaction layer at room temperature to 400.degree. C. to form the single crystal, epitaxial BaF.sub.2 layer.

Abstract: 5-ureido-1,3-diamino-2,4-6-trinitrobenzene, ##STR1## which is prepared by reacting 5-fluoro-1,3-diamino-2,4,6-trinitrobenzene with urea.

Abstract: A diamond, ceramic, metal, or metal alloy surface is coated with molten Csub.3. The coated surface is then heated in air at a temperature of from about 200.degree. C. to 250.degree. C. until the molten CrO.sub.3 coating is converted into a black, powdery adherent coating of CrO.

Abstract: A pyrotechnic, molten metal jet torch which employs a loose pyrotechnic ster powder such as (1) magnesium powder, or an intimate mixture of (2) Mg and CuO, (3) Mg and Fe.sub.2 O.sub.3, (4) Mg and Co.sub.3 O.sub.4, (5) Al and CuO, or (6) Al and Fe.sub.2 O.sub.3 powders which are capable of being ignited by a conventional military incendiary grenade fuse and which generated enough heat to ignite pyronol pellets which are pressed from an intimate powder mixture of (1) nickel, (2) metal oxide, (3) a component selected from the group consisting of (a) aluminum and (b) a mixture of at least 50 weight percent aluminum and a metal that is magnesium, zirconium, bismuth, beryllium, boron, or mixtures thereof.

Abstract: A process for producing a lightweight electrode grid by exposing a compred, heated mat of dense graphite fibers to Ni(CO).sub.4 gas wherein the Ni(CO).sub.4 decomposes upon contact with the graphite fibers depositing a nickel metal coating on the graphite fibers which strongly bonds the fibers together to form a compressed mat or grid of nickel metal coated fibers.

Abstract: Energetic nitramine containing cyclotriphosphazene which include 1,1,3,3,-tris-spiro(N,N'-dinitroethylenediamino)cyclotriphosphazene, 1,1-spiro(ethylenediamino)-3,3,5,5-bis-spiro(N,N'-dinitroethylenediamino)c yclotriphosphazene, 1,1,3,3-bis-spiro(N,N'-dinitroethylenediamino)-5,5-dichlorocyclotriphospha zene, 1,1,3,3-bis-spiro(N,N'-dinitroethylenediamino)-5,5-difluorocyclotriphospha zene, 1,1-spiro(N,N'-dinitroethylenediamino)-3,3,5,5-bis-spiro(ethylenediamino)c yclotriphosphazene, 1,1-spiro(ethylenediamino)-3,3-spiro(N,N'-dinitroethylenediamino)-5,5-dich lorocyclotriphosphazene, 1,1-spiro(ethylenediamino)-3,3-spiro(N,N'-dinitroethylenediamino)-5,5-difl uorocyclotriphosphazene, 1,1-spiro(N,N'-dinitroethylenediamino)-3,3,5,5-tetrachlorocyclotriphosphaz ene, and 1,1-spiro(N,N'-dinitroethylenediamino)-3,3,5,5-tetrafluorocyclotriphosphaz ene, which can be used in explosive compositions.

Abstract: A method of measuring strain in material by(1) selecting a metallic glass ribbon of the compositionFe.sub.w B.sub.x Si.sub.y C.sub.zwherein0.70.ltoreq.w.ltoreq.0.83,0.10.ltoreq.x.ltoreq.0.20,0.03.ltoreq.y.ltoreq.0.10,0.ltoreq.z.ltoreq.0.03, andw+x+y+z=1.00wherein the metallic glass ribbon is essentially strain free and has easy xes of magnetization which are in the plane of the ribbon transverse (at 90.degree.) to the long axis of the ribbon;(2) bonding the metallic glass ribbon to material to be measured by means of a homogeneous viscous organic liquid having a viscosity greater than 10.sup.5 cp at 25.degree. C.;(3) allowing the viscous liquid to relax until the metallic glass ribbon is not stressed by the viscous liquid and is in a state of constant strain within it magnetostrictive dynamic range; and(4) measuring the susceptibility of the metallic glass ribbon which is directly proportional to strain within the material being measured.

Abstract: A floating torch burning polydimethylsiloxane to provide a decoy over the termediate infrared spectrum of a ship.

Abstract: A method of doping diamond by(1) ion implanting carbon into the diamond to create a damage zone of opaque, nondiamond material;(2) ion implanting a semiconductor dopant material that is a pentavalent donor dopant or a trivalent acceptor dopant into the damage zone of opaque, nondiamond carbon material;(3) melting the opaque, nondiamond carbon material by lased light; and(4) allowing the carbon melt to cool and crystallize homoepitaxially as diamond from the diamond surfaces during which the dopant material is incorporated into the new diamond lattice.

Abstract: 1,3,4-Oxadiazoles of the formula ##STR1## are prepared by cyclization (dehydration) of the corresponding diacylhydines of the formula R.sub.1 C(O)NHNHC(O)R.sub.2 with phosphorous pentachloride or phosphorous oxychloride wherein R.sub.1 is --CF.sub.2 CF.sub.2 CF.sub.2 SF.sub.5, --CF.sub.2 CF.sub.2 SF.sub.5, or --CH.sub.2 SF.sub.5 and R.sub.2 is --CH.sub.2 CH.sub.2 C(NO.sub.2).sub.3, --CH.sub.2 CH.sub.2 C(NO.sub.2).sub.2 F, --CF.sub.2 CF.sub.2 CF.sub.3, --CF.sub.2 CF.sub.3, --CF.sub.3, or --CH.sub.2 SF.sub.5.

Abstract: A process for preparing a diamond particle/silver metal matrix composite ucture by coating diamond particles with molten silver nitrate, decomposing the silver nitrate to form a silver metal coating on the surfaces of the diamond particles, consolidating the silver metal coated diamond particles into a composite structure having continuous pores between the silver metal coated diamond particles, infiltrating the continuous pores of the composite with molten silver nitrate and decomposing the silver nitrate to form silver metal which fills the continuous pores of the composite structure.

Abstract: A high energy explosive composite which comprises(1) from about 2 to about 30 weight percent of an energetic polymer matrix f a urethane which is the reaction product of(a) a hydroxy-terminated prepolymer of the formula ##STR1## where R is --CH.sub.2 CF(NO.sub.2).sub.2 or --CH.sub.2 C(NO.sub.2).sub.2 CH.sub.3 ; A is --CH.sub.2 CH.sub.2, --CH.sub.2 OCH.sub.2 --, or --CH.sub.2 OCH.sub.2 OCH.sub.2 --, and n>1, and(b) a polyisocyanate which is used in an amount sufficient to supply from about 0.8:1 to about 1.5:1 isocyanate functional groups for each hydroxy functional group;(2) from about 8 to about 20 weight percent of an energetic plasticizer; and(3) from about 50 to about 90 weight percent of an explosive;wherein the energetic plasticizer and explosives are uniformly dispersed throughout the energetic polymer matrix.