Abstract: A process for the passivating, multistage compaction of hot iron particles supplied in the form of a packed bed from a reduction unit and for the subsequent breaking apart of the compacted iron band is described. Prior to the final compacting, the iron particles pass through a homogenizing and precompressing stage. Thus, the compacted iron has a pore volume of max. 40% and a density of at least 5.5 g/cm.sup.3. The iron compacted to a band is subsequently guided between the rollers (7,8,11) of a separating stage exposing it to bending stresses such that it breaks apart at the predetermined desired breaking points. The latter have a smaller density than the band regions between them. They can be produced in that in the precompression stage the feed speed is briefly decelerated compared with the feed speed in the compaction stage or in the compaction stage there is less marked compression at these points than in the intermediate regions.

Abstract: For preparing a chromium metal powder lacking in oxygen and having an average particle size not greater than 20 .mu.m, a mixture of chromium oxide and calcium oxide, in a molar ratio of 1:0.5 to 1:2, is calcined initially at temperatures of 650.degree. to 1,200.degree. C. with access of oxygen up to a weight increase of 1 to 6 g per mole of chromium oxide, the calcined product is comminuted to a particle size not greater than 100 .mu.m and the product so obtained is reduced calciothermally. The calcium oxide can be replaced wholly or partially by calcium carbonate.

Abstract: A process for selectively forming nitrohydrocarbon compounds by contacting, at elevated temperature and pressure and in a homogeneous gas phase, an olefinic unsaturated compound having at least three carbon atoms with NO.sub.2 alone or in the presence of oxygen and/or water.

Abstract: A powder-metallurgy alloy article having a good combination of wear resistance and corrosion resistance. The article is further characterized by an attainable minimum hardness after heat treatment of 60R.sub.c and a martensitic structure. The article is made from prealloyed particles of the composition, in percent by weight, carbon 2.5-5, manganese 0.2-1, phosphorus 0.10 maximum, sulfur 0.10 maximum, silicon 1 maximum, nickel 0.5 maximum, chromium 15-30, molybdenum, 2-10 vanadium 6-11, nitrogen 0.15 maximum and balance, iron. The article has a fine, uniform distribution of a MC and other carbide phases.

Abstract: There is disclosed an aluminum nitride substrate which comprises a substrate composed of an aluminum nitride sintered product; an electroconductive metallized layer composed of titanium nitride and at least one selected from the group consisting of molybdenum, tungsten, tantalum, an element in group III of the periodic table, an element in group IVa of the same, a rare earth element, an actinide element and a compound containing these elements; and an electroconductive protective layer laminated in this order on the aluminum nitride sintered product.

Abstract: A process for decreasing the embrittling tendency of lithium in aluminum-base alloy compositions containing lithium comprising incorporating silicon in the alloy composition and forming the alloy as a dispersion strengthened powder, and dispersion strengthened aluminum-base alloy compositions comprised of aluminum, lithium and silicon having improved properties.

Abstract: The present invention relates to a composite formed of a mixture of ceramic particles and at least two metallic components adhered together with a glassy phase. A first of the metallic components, in particle form, enhances the flow characteristics of the mixture where the second metallic component and the glass are in the molten condition. The final composite is a continuous phase of the second metallic component having particles of the first metallic component and glass coated ceramic particles distributed therein.

Abstract: The depth of water ahead of a vessel is detected by sonar means carried aboard a drone stationed by radio control ahead of the vessel. Detected depth information is transmitted from the drone to the vessel where it is displayed for use by the vessel pilot in navigating shallow waters.

Abstract: A sintered hard metal having superior toughness and superior hardness may be used for micro-drills, tools and wear resistant parts. The metal is a cemented carbide WC formed from tungsten carbide WC as the base alloy and containing 4 to 20 percent by weight of vanadium carbide VC or zirconium nitride. Its micro-structure is that the WC or WC-VC particles are 0.6.mu. or less, its Rockwell Hardness HRA is at least 91.5 and its transverse rupture strength is at least 350 kg/mm.sup.2.

Abstract: There is provided a substantially fully dense powdered metal composite comprising a highly conductive metal or metal alloy matrix having dispersed therein discrete microparticles of a refractory metal oxide and discrete macroparticles of an additive metal or metal alloy, such as a nickel/iron alloy. The respective components undergo minimal alloying because sintering is not utilized in forming the composite. These composites are characterized by high thermal or electrical conductivity and a desired property attributable to the composite forming additive metal or metal alloy. The composites are useful in forming lead frames for integrated circuit chips, electric lamp lead wires, and electrical contact members.

Abstract: The utilization of metal hydride and an acidic reagent for the accelerating of masses, and propulsion devices for applying such materials. The materials are of a saline complex metal hydride and acidic reagent which is sprayed onto the metal hydride which is offered in a lumpy consistency, for the pulse-like generation of expanding reaction gas bubbles in a constructive or dynamically, yieldably dammed chamber. Also provided is a propulsion device for the application of the above materials, with a support for a saline complex metal hydride of a lumpy consistency in a yieldably dammed expansion chamber in which an injection nozzle for the reagent is directed towards a surface portion of the metal hydride.

Abstract: A molybdenum article is disclosed in which the substrate thereof has adherently bonded thereto a thermally self-healing plasma-sprayed coating consisting essentially of a composite of molybdenum and a refractory oxide material capable of reacting with molybdenum oxide under oxidizing conditions to form a substantially thermally stable refractory compound of molybdenum. The plasma-sprayed coating is formed of a plurality of interbonded plasma-sprayed layers of a composite of molybdenum/refractory oxide material produced from a particulate mixture thereof. The coating comprises a first layer of molybdenum plasma-sprayed bonded to the substrate of said molybdenum element and a second layer of plasma-sprayed mixture of particulate molybdenum/refractory oxide consisting essentially of predominantly molybdenum bonded to the first layer.

Abstract: The present invention is directed to a cermet material comprising a matrix of aluminum alloy with ceramic particles distributed therein. The cermet is adapted for use as a semiconductor substrate and is manufactured using powder technology procedures. The cermet comprises from about 40 to about 60 volume % of aluminum or aluminum alloy, from an effective amount up to about 10 volume % of binder for enhancing bonding between the aluminum alloy and ceramic particles, and the balance essentially ceramic particles.

Abstract: A composite wire useful for arc gun spraying is formed of an alloy sheath comprising iron, nickel, or cobalt, and a core comprising boron-containing powder of boron and/or boron carbide sufficiently fine in size such that the boron is substantially dissolved in a coating produced by arc gun spraying the composite wire. Where the boron substance includes boron, the core should further comprise fine carbon powder less than 20 microns in size blended with the boron powder. Preferably a substantial portion of the boron-containing powder is less than 20 microns. In a particularly desirable embodiment, the sheath is formed of mild steel and the core comprises boron carbide and an alloy powder such as ferromolybdenum.

Abstract: A molten metal-liquid explosive device comprising:(1) a metal casing enclosing an inner space;(2) a fusable metal wall dividing the inner space into a liquid chamber and pyrotechnic material chamber;(3) a liquid (e.g., water) contained in the liquid chamber;(4) a pyrotechnic material essentially comprising an intimate mixture of(a) a magnesium nickel alloy hydride of the formula MgNi.sub.x H.sub.y wherein 0<.times..ltoreq.0.50 and 1.50.ltoreq.y.ltoreq.2.00 and(b) a oxidizer selected from the group consisting of CuO, Li.sub.2 O.sub.2, BaO.sub.2, and mixtures thereof;wherein the molar ratio of oxidizer to magnesium nickel alloy hydride (MgNi.sub.x H.sub.y) is from about 0.75:1 to about (1.50+0.5y):1 andwherein the pyrotechnic material is contained in the pyrotechnic material chamber in an amount sufficient to melt the fusable metal wall dividing the liquid chamber and the pyrotechnic material chamber; and(5) means for igniting the pyrotechnic material.

Abstract: An improved glass sheet bending mold (10) disclosed comprises a stainless steel base (12) for receiving the heated glass sheet to be bent. An electrically deposited metal carbide coating (16) is deposited on the stainless steel base (12). A boron nitride covering (18) covers the metal carbide coating (16) to provide a forming surface (14) that is harder than the base (12) and is wetted less by the heated glass sheet than is the base.

Abstract: An improved electrolyte is provided in a lithium/sulfur dioxide rechargea cell, the electrolyte comprising a solution of a stable, highly conductive liquid electrolyte complex LiAlCl.sub.4 --3SO.sub.2 and up to about 50 percent by weight of sulfuryl chloride as a cosolvent.

Abstract: A glass crucible (30) for containing a material from which a silicon crystal melt is produced, wherein the inside surface area of the crucible is increased to react with the silicon melt (31) to increase the oxygen content thereof. The inside surface area may be increased by incorporating inwardly directed silica ribs (40) or concentric, hollow silica cylinders (32) as well as forming corrugations (45) or undulations on the inside surface thereof.

Abstract: A method for forming free standing ceramic bricks for use as tritium breeder material is disclosed. Aqueous solutions of sodium carbonate and potassium carbonate are mixed with an organic hydrocolloid dispersion and powdered lithium carbonate, spray dried, and ceramic bricks formed by molding in a die and firing.

Abstract: A double base propellant grain inhibitor is comprised of a hydroxyl-termied polybutadiene polymer having from 2 to about 3 hydroxyl groups per average molecule and an approximate molecular weight of 2800 to 3600, an inert filler, a cross-linking agent, a thickening agent, an antioxidant, a curative, and a catalyst. When properly applied to the surface of a propellant grain, the inhibitor bond does not weaken with age and the inhibitor produces planar, no-cone grain burning having a constant chamber pressure during the burning of the propellant grain. A 1,4-butylene oxide-type polyether barrier layer consisting of a poly-1,4-butylene oxide diisocyanate with an approximate molecular weight of 850 to 1000, a diol curative, a triol cross-linker, and antioxidant and a cure catalyst can be added between the propellant grain and inhibitor to reduce propellant plasticizer migration.