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| Number | Title | Issue Date |
| 6554915 | Dissolution of nickel in non-oxidizing aqueous acid solutions Fairly pure metallic nickel may be efficiently dissolved in non-oxidizing acid. If the nickel includes individual pieces longer than 0.5 mm in any linear dimension, oxidizing agent is preferably added from the beginning of dissolution, while if the nickel... | 04/29/2003 |
| 5951945 | Hydrogen occluding alloy and electrode made of the alloy There is provided a hydrogen occluding alloy exhibiting high absorption and desorption speeds. A hydrogen occluding alloy comprising as an overall composition: 25 to 45 weight % Zr+Hf, wherein the Hf comprises not more than 4%, 1 to 12 weight % Ti, 10 to ... | 09/14/1999 |
| 5879747 | Composite material and process of producing same An electroconductive composite material composed of a three-dimensional continuum of a porous metal with the pores filled with graphite and a resin, having a good heat resistance, wear resistance, strength and thermal conductivity, having a light weight, ... | 03/09/1999 |
| 5863618 | Method for producing a chromium carbide-nickel chromium atomized powder A method for producing an atomized powder of chromium carbide particles dispersed in a nickel chromium matrix in which chromium in the powder is from 55 to 92 weight percent of the powder.... | 01/26/1999 |
| 5338714 | Composite alumina/metal powders, cermets made from said powders, and processes of production The invention relates to nano-composite powders of alumina and metal constituted of grains of micronic size. Each grain comprises a compact matrix of alumina of a specific surface area less than 5 m2 /g, in which are dispersed crystallites of t... | 08/16/1994 |
| 5238482 | Prealloyed high-vanadium, cold work tool steel particles and methods for producing the same Prealloyed high-vanadium, cold work tool steel particles are provided for use in the powder-metallurgy production of tool steel articles. The particles are of a cold work tool steel alloy having an MC-type vanadium carbide dispersion of a carbide particle... | 08/24/1993 |
| 5147449 | Process for production of metal-metalmetalloid powders with their articles having ultramicrocrystalline to nanocrystalline structure A process for producing metal metalmetalloid powder, with its particles having ultramicrocrystalline structures to nanocrystalline structures with the metalmetalloid component being composed of at least one metal reacted with at least one metalloid of the... | 09/15/1992 |
| 4902471 | Method for producing metal carbide grade powders A method is disclosed for producing metal carbide grade powders, which comprises forming a wax mixture consisting essentially of in percent by weight about 10 to 60 of an organic compound additive which is a solid at room temperature and contains a C.dbd.... | 02/20/1990 |
| 4897110 | Production of noble metal/non-noble metal oxide powder A compound powder being comprised of a noble metal and of a nonnoble metal oxide is produced under atomization of salts of these metals in a watery solution and under further utilization of a hot reactor wherein a droplet containing gas flow is moved insi... | 01/30/1990 |
| 4894086 | Method of producing dispersion hardened metal alloys A method of producing dispersion hardened metal alloys which incorporate highly reactive metals or their alloys whose oxides are not adapted to be easily reduced. According to the method, the highly reactive metals of their alloys are added as powder part... | 01/16/1990 |
| 4891059 | Phase redistribution processing Homogeneous and refined microstructure powders and the method of making them from, for example, liquid metal immiscible systems or very limited solid solubility systems. At least two metals are melted and then rapidly solidified to yield a solid with a se... | 01/02/1990 |
| 4885028 | Process for producing prealloyed tungsten alloy powders A process for forming particulate tungsten heavy alloys from agglomerated material containing the individual metals by using a high temperature zone is improved by retaining the material in the high temperature zone for a time sufficient to at least parti... | 12/05/1989 |
| 4872904 | Tungsten carbide powder and method of making for flame spraying A cobalt bonded tungsten carbide powder is produced by a method comprising preparing a mixture consisting of a first tungsten carbide powder having a particle size of -5 microns, a second tungsten carbide powder having a particle size of -44+10 microns, a... | 10/10/1989 |
| 4863510 | Reduction process for preparing copper, silver, and admixed silver-palladium metal particles Fine particles of a metal such as copper and silver can be obtained by reducing the corresponding metal compound solution with one or more reducing agents selected from the group consisting of L-ascorbic acid, L-ascorbate, D-erythorbic acid and D-erythorb... | 09/05/1989 |
| 4812289 | Oxide dispersion hardened aluminum composition Refractory metal oxide particles are dispersed in an aluminum melt which is then cast to form a dispersion hardened aluminum alloy composition. A master mix of carrier metal particles surrounding individual oxide particles is pressed into a billet. The bi... | 03/14/1989 |
| 4804167 | Apparatus for making noble metal/non-noble metal composite powder A compound powder being comprised of a noble metal and of a nonnoble metal oxide is produced under atomization of salts of these metals in a watery solution and under further utilization of a hot reactor wherein a droplet containing gas flow is moved insi... | 02/14/1989 |
| 4799955 | Soft composite metal powder and method to produce same Disclosed is a composite metal powder made from a base iron powder milled with an alloying component such as nickel, copper, managnese, chromium, silicon, phosphorus, boron, vanadium, and molybdenum, where the composite metal powder has a compressibility ... | 01/24/1989 |
| 4784686 | Synthesis of ultrafine powders by microwave heating A method of synthesizing ultrafine powders using microwaves is described. A water soluble material is dissolved in water and the resulting aqueous solution is exposed to microwaves until the water has been removed. The resulting material is an ultrafine p... | 11/15/1988 |
| 4783216 | Process for producing spherical titanium based powder particles A powdered material and a process for producing the material are disclosed. The powdered material consists essentially of titanium based spherical particles which are essentially free of elliptical shaped material and elongated particles having rounded en... | 11/08/1988 |
| 4728359 | Method of producing a dispersion-hardened metal alloy A method of producing a dispersion-hardened metal alloy in which oxide particles are distributed uniformly in the metal matrix. The oxide particles, in finely divided form, are added to a solution of the metal along with a deglomerating agent so as to be ... | 03/01/1988 |
| 4711661 | Spherical copper based powder particles and process for producing same A powdered material and a process for producing the material are disclosed. The powdered material consists essentially of copper based spherical particles which are essentially free of elliptical shaped material and elongated particles having rounded ends... | 12/08/1987 |
| 4711660 | Spherical precious metal based powder particles and process for producing same A powdered material and a process for producing the material are disclosed. The powdered material consists essentially of precious metal based spherical particles which are essentially free of elliptical shaped material and elongated particles having roun... | 12/08/1987 |
| 4647304 | Method for producing dispersion strengthened metal powders Disclosed is a method for mechanically compositing metal powders to produce composite metal powder material having a substantially homogeneous dispersion of refractory particles dispersed throughout a metallic matrix and being substantially free of oxide ... | 03/03/1987 |
| 4592781 | Method for making ultrafine metal powder A fine aluminum metallurgical powder suitable for compacting and sintering into densified articles which includes a dispersed phase is produced by directing a stream of molten droplets at a repellent surface to produce smooth surfaced and melt solidified ... | 06/03/1986 |
| 4540546 | Method for rapid solidification processing of multiphase alloys having large liquidus-solidus temperature intervals Rapid solidification processing by liquid quenching is made practical for multiphase alloys having relatively large liquidus-solidus temperature intervals by a new processing technique termed "melt mix reaction" involving chemically reacting two starting ... | 09/10/1985 |
| 4439236 | Complex boride particle containing alloys Boron-containing transition metal alloys based on one or more of iron, cobalt and nickel, and containing at least two metal components, are characterized by being composed of ultrafine grains of a primary solid-solution phase randomly interspersed with pa... | 03/27/1984 |
| 4427447 | Alumina-yttria mixed oxides in dispersion strengthened high temperature alloy powders Disclosed are metal powders mixtures which can be mechanically alloyed into oxide dispersion strengthened high temperature alloys. The powder mixtures contain from 0 to 30 wt. % chromium, about 0 to 3 wt. % titanium, about 0.3 wt. % to 10 wt. % aluminum, ... | 01/24/1984 |
| 4396420 | Process for making Ag powder with oxides This invention relates to a silver powder of Ag/CdO composition for use in electrical contacts comprising particles in the size range of about 1 to 10 microns and containing cadmium oxide in the form of a precipitate with a grain size less than about 0.5 ... | 08/02/1983 |
| 4315770 | Dispersion strengthened metals A process for dispersion strengthening of atomized alloy particles by internal oxidation is substantially improved by providing atomized particles substantially free of oxide surface film to enhance the efficiency of the internal oxidation step. The atomi... | 02/16/1982 |
| 4274877 | Metal powders This invention relates to metal powders. In particular, the invention provides a novel metal-refractory composite powder which will withstand high temperatures, and means for its production. The metals for which the invention will have special application... | 06/23/1981 |
| 4182627 | Balls containing tungsten carbide A process for producing balls of cobalt containing tungsten carbide, the process comprising forming droplets of a liquid mixture comprising: particles of tungsten carbide; guar gum; a dissolved cobalt salt; and a non-ionic wetting agent; contacting the dr... | 01/08/1980 |
| 4156053 | Method of making oxide dispersion strengthened powder A process for preparing metal having a substantially uniform dispersion of hard filler particles. The process includes the steps of: admixing particles of a first metallic component with oxide particles having a negative free energy of formation at 1000°... | 05/22/1979 |
| 4146388 | Molybdenum plasma spray powder, process for producing said powder, and coatings made therefrom Plasma spray powders of molybdenum particles containing at least 0.5 weight percent oxygen and obtained by reacting molybdenum particles with oxygen or oxides in a plasma, form plasma spray coatings exhibiting hardnesses comparable to flame sprayed coatin... | 03/27/1979 |
| 4146504 | Porous powders and a method for their preparation Novel materials formed from powders of high porosity, usually characterized by high surface area and always with a very low bulk density, are disclosed. Metal-bearing powders of this type are found to be particularly useful as catalysts and in magnetic ap... | 03/27/1979 |
| 4084964 | High HfC-containing alloys A new class of cobalt-based alloys and the like containing hafnium carbide (HfC) of particle size finer than about 3 microns and containing HfC in the range 2 to 15% by volume. The class has good strength characteristics at both very high and very low tem... | 04/18/1978 |
| 4036634 | Oxidation and sinter-resistant metal powders A high density precious metal powder that resists sintering at 600° C. and contains a very small percentage of titania or zirconia is produced by co-nucleation and precipitation of gold and titania from an ammoniacal solution at pH 3-4 with a bisulfite. ... | 07/19/1977 |
| 4010024 | Process for preparing metal having a substantially uniform dispersion of hard filler particles A process for preparing metal having a substantially uniform dispersion of hard filler particles. The process includes the steps of: admixing metal powder and oxide particles having a negative free energy of formation at 1000° C of at least as great as t... | 03/01/1977 |
| 4004891 | Superalloys containing nitrides and process for producing same Superalloys containing uniform dispersions of at least 0.1 volume percent of a metal nitride improve qualities of superalloys. These superalloys are produced from superalloy powders by a nitridng process utilizing a controlled atmosphere for controlled ti... | 01/25/1977 |
