Abstract: Al-based alloys comprising predetermined amounts of Cr and Ti with the balance being Al and inevitable impurities. The alloys are made by powder metallurgy by which the additive elements are finely dispersed in an Al matrix. The alloys may further comprise up to 5 wt. %. of Fe.

Abstract: A method for making seamless, porous metal articles comprising:(a) rotating a mold containing a stabilized suspension of a metal particulate at a rate and for a time such that the particulate is separated from the suspension and distributed on the interior wall of the mold, thereby forming a structure conforming to the interior wall of the mold, the rate of rotation being sufficiently high that at least about 100 Gs of centrifugal acceleration is achieved at the interior wall of the structure,(b) drying the formed structure to provide a structure having green or unsintered strength, and(c) sintering the dried structure to remove volatile material and fuse the individual particles of the particulate to each other to form the seamless, porous metal article.Metal articles in accordance with the invention have substantially uniform diameters, thicknesses and pore structures, have Bubble Point ratios of 1.5 or less, and find particular use as filters.

Abstract: A magnetic powder composition suitable for manufacturing a powder core used in a reactor or transformer connected to a semiconductor switching element, essentially consists of a powder of a soft magnetic metal or alloy or a mixture of these, an electrically insulating binder polymer for binding the powder, and a coupling agent of an organic metallic compound for coupling the powder and the binder polymer. The obtained powder core has excellent frequency characteristics of magnetic permeability, a high magnetic flux density, and a small iron loss at high frequencies.

Abstract: A nuclear fuel assembly comprising a plurality of fuel rods, each fuel rod comprising a cladding tube closed at both ends and filled with cylindrical nuclear fuel pellets such as sintered uranium dioxide or uranium plutonium dioxide. All or nearly all of the cylindrical pellets are coated with a refractory boride coating of sufficient thickness to prevent mechanical interaction between the pellets and the tube. The isotopic composition of the boron in the refractory boride is adjusted for each batch of fuel pellets, rods, or assemblage of rods so that the initial excess reactivity, k, of the batch, when assembled in a reactor core, is nearly zero.

Abstract: The disclosed invention describes a method for cladding surfaces of an earth boring apparatus, or the like, with a hardfacing material having an entrained, or encapsulated, heavy metal refractory carbide. The method includes heating the surface to the incipient melting temperature and applying a molten super-alloy matrix material that has a melting temperature below the melting temperature of the carbide. The super-alloy, in a powder form, is pre-mixed with the carbide material, also in a powder form, such that, when the molten surface and the molten super-alloy cool, they form a metallurgical bond, at the surface, with the carbide material mechanically retained within the solidified matrix material.

Abstract: A surface coated tungsten carbide-base sintered hard alloy material for inserts of cutting tools having excellent wear resistance and toughness comprising(1) a substrate having an internal portion consisting essentially of 5-30 percent by weight of one composite metal carbo-nitride, as a compound forming a hard dispersion phase, selected from the group consisting of (Ti, W)CN, (Ti, Nb, W)CN, (Ti, Ta, W)CN, and (Ti, Nb, Ta, W)CN; 4-10 percent Co as a component forming a binder phase, and the balance of WC as a component forming the hard disperse phase and inevitable impurities; the substrate having a surface portion formed with a Co-enriched layer being substantially free of the composite metal carbo-nitride; and(2) a hard surface layer coated over the surface of the substrate, comprising an innermost layer consisting essentially of TiC, the innermost layer containing one of a W component and W and Co components diffused from the substrate; a diffusion preventing layer formed by one of a single layer of one co

Abstract: The improvement of strength and hardness of steel powders can be realized under good compressibility by alloying 0.2.about.2.0 wt. % of W and 0.8.about.3.0 wt. % of Ni, and further 0.1.about.1.0 wt. % of Mo or 0.2.about.2.0 wt. % of Cu in steel powder, and further the reduction of dimensional deviation introduced by heat treatment after sintering can also be achieved. This substantially eliminates damaging the shape and size of the sintered body after heat treatment.

Abstract: The invention is a backing material for an ultrasonic transducer. The backing material comprises a composite of tungsten powder, cerium oxide powder in an amount of 1.0 to 4.5% by weight tungsten, and an epoxy in a weight proportion to powder of from 4:1 to 50:1.

Abstract: In a mechanical plating process, oxidation-prone metals, such as aluminum, titanium, magnesium, and mixtures thereof, can be applied to metal substrates without the corrosion problems encountered in the prior art. To avoid such problems, the substrate is plated with the oxidation-prone metal and relatively minor amounts of an immersion metal and, optionally, a protective metal. The immersion metal which can be salts or oxides of metals selected from the group consisting of tin, copper, nickel, cadmium, zinc, lead, and mixtures thereof coats the oxidation-prone metal in forming a mechanical plating coating and prevents formation of an oxide layer on the oxidation-prone metal. The protective metal which may be selected from the group consisting of zinc, cadmium, and mixtures thereof prevents oxidation of the plated metal substrate when exposed to the environment. An etching agent is used either prior to and/or during mechanical plating.

Abstract: A bearing or other support member containing intercalated graphite exhibits many of the properties of a metal (ie: conductivity, luster, ductility) while enhancing the lubricating properties of pure graphite. The bearings are made by pressing an intercalated graphite powder either alone or mixed with metal powders, organic polymers or ceramic powders into the desired shape. This results in a bearing that has low friction properties, improved load bearing characteristics, higher operating temperatures and a reduced cost of manufacture.

Abstract: Superalloy with oxide dispersion hardening having improved corrosion and oxidation resistance and based on nickel with the following composition:Cr=17-18% by weight,Al=6-7% by weight,Mo=2-2.5% by weight,W=3-3.5% by weight,Ta=2-2.5% by weight,Zr<0.2% by weight,B<0.02% by weight,C<0.1% by weight,Y.sub.2 O.sub.3 =1-1.5% by weight,Ni=Remainder.

Abstract: A composition for fixing metal powder molding at sintering, which is used, in the case of disposing a metal powder molding formed by rolling a mixture of a metal powder and a synthetic resin-based binder on a metal base material and sintering the metal powder molding in a non-oxidizing atmosphere, to adhere and fix the metal powder molding onto the base material until the metal powder molding is sintered by interposing between the metal powder molding and the base material, comprising a thermosetting resin composition containing a mixture of a thermosetting resin and at least one member selected from the group consisting of a metal fine powder, a thermoplastic resin and an adhesive material, wherein the amount of the residual carbon of the composition after completion of sintering is at least about 0.5% by weight.

Abstract: Disclosed is a process for fabricating a composite polycrystalline diamond or cubic boron nitride (CBN) compact. Briefly, the process is conducted by mating a pre-formed sintered polycrystalline diamond or CBN compact and a plastically deformable support, and subjecting the mated composite compact to elevated temperature and pressure conditions sufficient to plastically deform the support into attachment with the compact. The temperature, pressure and time of application are inadequate to cause degradation of the diamond or CBN compact. The product configuration may be a conventional layered compact or may be a wire drawing die having a polycrystalline diamond or CBN core with a support jacket of a material such as a cemented metal carbide.

Abstract: A coating for improved resistance welding of galvanized steel parts or sheets comprises a binder, and a metal phosphide pigment, preferably a ferrophosphorus pigment, having a particle size of from about 0.1 to about 30 microns. The pigment can also include up to about 40% by weight of an additional metal such as tin, aluminum or lead, which can be combined with the metal phosphide in pigment form or deposited onto the surface of the particles. The coating can be applied to either the faying or non-faying surfaces of the galvanized steel, or to the resistance welding electrode, and may be removed, if desired, after the welding operation.The advantages of the present invention include a significant reduction in welding current and an increase in the weldability lobe width, a restoration of the dynamic resistance beta peak, and an increase in electrode life.

Abstract: A process for producing a brazable ceramic composite by infiltrating silicon into a porous body at least partly composed of molybdenum to form at least about 5% by volume of a silicide of molybdenum in situ.

Abstract: Flexible polyvinyl chloride resin compositions combining a high degree of flame retardancy and thermal stability comprise di-2-ethylhexyl tetrabromophthalate and an optional flame retardant enhancing agent.

Abstract: A thin film of titanium diboride that has been deposited onto a substrate d patterned using photolithography is dry etched in a commercial plasma etcher with either a chloride, or a mixture of a chloride gas with oxygen, or a mixture of a chloride gas with nitrogen, or a mixture of a chloride gas with a noble gas, or a fluoride gas, or a mixture of a fluoride gas with oxygen, or a mixture of a fluoride gas with nitrogen, or a mixture of a fluoride gas with a noble gas.

Abstract: A thin film of zirconium diboride that has been deposited onto a substrate nd patterned using photolithography is dry etched in a commercial plasma etcher with either chloride gas, or a mixture of a chloride gas with oxygen, or a mixture of a chloride gas with nitrogen, or a mixture of chloride gas with a noble gas, or a fluoride gas, or a mixture of a fluoride gas with oxygen, or a mixture of a fluoride gas with nitrogen, or a mixture of a fluoride gas with a noble gas.

Abstract: A first wall construction for a tokamak reactor is disclosed, comprising a series of hollow lobes, each having a pair of side wall portions with a curved end wall portion extending therebetween. Each lobe is adapted to withstand substantial pressure on the concave side of the curved end wall portion while withstanding substantial heat flux on the convex side. The curved end wall portion has a shape which is approximately cylindrical in curvature but differs from being circular in curvature by a substantial deviation, in that such curved end wall portion is flatter in curvature than a truly circular curvature by the amount of such deviation, such that the thermal stresses generated in the curved end wall portion by such heat flux are at least approximately balance or neutralized by the bending stresses generated in such curved end wall portion by such pressure. The curvature may correspond generally in shape to the flatter half of an ellipse.

Abstract: An asbestos-free intumescent thermal protection coating consisting essently of from 0.5 to 1.5 weight percent of a ceramic fiber that comprises from 40 to 50 weight percent of Al.sub.2 O.sub.3, 50 to 60 weight percent of SiO.sub.2, from 0.5 to 1 weight percent of Fe.sub.2 O.sub.3, and from 1.2 to 2 weight percent of TiO.sub.2, the fiber having the dimensions of less than 3.2 millimeters in length and from 0.8 to 1.2 micrometers in diameter and from 98.5 to 99.5 weight percent of a polysulfide-epoxide binder. The binder may include a filler.