Abstract: A flux for solder paste contains a dicarboxylic acid of carbon number 3 to 5 and a dicarboxylic acid of carbon number 15 to 20 as an activator, which prevents skinning or changes by aging of viscosity. In actual use, the solder paste of the present invention can maintain good coating and printing ability for long time, further can endure preheating under high temperatures.

Abstract: The present invention relates to a component (1) comprising an element (2), which contains zirconium or a zirconium alloy and which has a surface (3) on which a corrosion protective layer (4) is formed, the oxide layer (4) comprising zirconium oxide. The component (1) is intended to be in an oxidising environment (6) and said oxide layer (4) has an outer surface (5) towards said oxidising environment (6). The element (2) comprises a layer (10), that borders said surface (3) and comprises hydrogen and at least one metal from the group of lanthanum elements and/or from the group platinum metals and/or yttrium which in its elemental form or as an oxide have the ability to effectively dissociate oxygen and H2O. The invention also relates to a method for manufacturing the component (1) and a nuclear facility comprising the component (1).

Abstract: A foamed/porous metal having fine bubbles in a matrix of aluminum or magnesium has shells of aluminum oxide or magnesium oxide formed between the matrix and the bubbles of carbon dioxide.

Abstract: Molding compositions and forming processes for normally rust-prone iron-based powders, and articles produced therefrom. Metal alloy systems that can be successfully formed using the processes of the invention, include elemental iron and iron alloys including low and medium alloy steels, tool steels and a number of specialty iron-base alloys.

Abstract: The present invention is an apparatus for filling a multi-powder including a powder box (10) including a plurality of powder chambers storing a plurality of powders whose constituent compositions differ in a divided manner, and a gas feed pipe (14) disposed on the bottom side of the powder chamber and having an introducing hole for introducing a gas, wherein it can fill a plurality of the powders into a cavity (24) at once through the bottom openings of the powder box by introducing a gas through the introducing hole to substantially equalize the respective flow resistances of a plurality of the powders. Thus, it is possible to fill the powders whose constituent compositions differ at once without disposing them in a mixed manner.

Abstract: A method of fabricating clutch races for one-way clutch mechanisms includes compacting and sintering a ferrous-based powder metal to near-net shape to produce a core density of between about 6.8 to 7.6 g/cc and a race surface that is near-net shape. The cam surface is cold worked in a manner that locally increases the density at the surface to develop a highly densified layer of essentially fully densified material and with a final surface finish that, after heat treatment, is ready to use in a one-way clutch application without further working. Both the inner and outer clutch races of one-way clutch mechanisms can be formed in this fashion and yield races that exhibit excellent strength, toughness, fatigue strength and wear resistance.

Abstract: An apparatus for pressing a mass into a coherent workpiece has a mold body defining a chamber and a mold liner in the chamber having a generally cylindrical pressing surface centered on an axis, directed in one radial direction, and defining a mold cavity and an opposite surface directed in an opposite radial direction. A plunger is engageable axially in the cavity. The cavity holds the mass in engagement with the pressing surface and with the plunger. The plunger can be pressed axially against the mass and thereby compress the mass in the cavity. A force, typically effected hydraulically, is exerted against the liner in the one radial direction between the mold body and the opposite surface of the liner to thereby elastically deform the liner in the one radial direction toward the mass and radially compress the liner and mass in the cavity.

Abstract: A method for minimizing the spread of the maximum compression forces in compacting powder, specifically metallic powder, by means of a powder press which has a die-plate, an upper ram, and at least one lower ram which are associated with a die-bore and are respectively operable by a hydraulic press cylinder, and a charging shoe movable on the die-plate along a predetermined path for filling the die-bore with the powder, wherein the maximum compression force of at least the upper ram is measured upon arrival at a predetermined position, the charging shoe, the die-plate, the upper ram and/or lower ram are vibrated at a predetermined frequency and amplitude during the filling operation and/or at the beginning of the compression procedure and, in addition, the filling time or the course of charging shoe motion in time are predetermined, wherein the frequency distribution of the maximum compression force values is determined at intervals and the standard deviation is determined therefrom for the maximum compressio

Abstract: The invention relates to a method for producing highly porous, metallic molded bodies. The inventive method consists of the following steps: a metallic powder used as a starting material is mixed with a dummy; a green body is pressed out of the mixture; the green body is subjected to conventional mechanical machining, the dummy advantageously increasing the stability of the green body; the dummy material is thermally separated from the green body by means of air, a vacuum or an inert gas; and the green body is sintered to form the molded body and is then advantageously finished. Suitable materials for the dummy are, for example, ammonium bicarbonate or carbamide. The mechanical machining carried out before the sintering advantageously enables a simple production close to the desired final contours, even for complicated geometries of the molded body to be produced, without impairing the porosity, and without high wear of the tools.

Abstract: Gravitational sag and shape distortion by friction over supporting hardware during binder removal and sintering of green bodies made from sinterable particulate materials are overcome by processing in a supercritical fluid medium at a pressure whereby the density of the medium approaches or equals that of the green bodies.

Abstract: Nitrided valve metals are described, such as nitrided tantalum and nitrided niobium. The nitrided valve metals preferably have improved flow properties, higher Scott Densities, and/or improved pore size distribution which leads to improved physical properties of the valve metal and improved electrical properties once the valve metal is formed into a capacitor anode. Processes for preparing a nitrided valve metal are further described and involve nitriding the valve metal at a sufficient temperature and pressure during a heat treatment that is prior to the deoxidation step. Capacitor anodes and other products incorporating the valve metals of the present invention are further described.

Abstract: There is provided a method for producing oxide dispersion strengthened ferritic steel tube by fabricating a raw tube by mixed sintering of a metal powder and an oxide powder and producing a tube of the desired shape by repeating cold rolling and heat treatment for a total of three times or more. The method comprises performing each of the intermediate heat treatments during the cold rolling by a two-step heat treatment consisting of a first step heat treatment of 1100° C. or lower and a second step heat treatment of 1100 to 1250° C. and higher than the first step temperature, and performing the final heat treatment at 1100° C. or higher.

Abstract: A 3D Printing Rapid Prototyping process using Al/Mg particles coated with a metal (i.e. copper, nickel, zinc, or tin) that (1) prevents oxidation of the Al/Mg particles, and (2) either alone, or when alloyed with the aluminum or magnesium core metal, melts below the liquidus temperature of the core.

Abstract: A method of manufacturing a sintered body, in which a material powder composed of metallic powder or alloy powder, a getter material having a higher oxidation potential than that of the material powder, and a hydride, which constitutes a hydrogen source, are sealed under reduced pressure in a metallic container, and subjected to pressurized sintering while being heated. The pressurized sintering is performed by keeping the metallic container at pressure not higher than 50 MPa and at temperature not lower than 500° C. for 1 to 50 hours, and then sintering the metallic powder and the alloy powder at pressure higher than 50 MPa and at temperature not higher than 1340° C.

Abstract: The porous material of the present invention is produced by heating a dry powder mixture, containing mainly an organic solid binder and inorganic particles. The mixture is foamed while the organic binder is melted. Foaming comes from a foaming agent in the powder mixture. The solid foamed structure comprising inorganic particles embedded in an organic binder is then heated to eliminate the organic binder and finally to sinter the remaining inorganic tri-dimensional network into a rigid structure having interconnected porosity.

Abstract: Methodology for constructing composite particles from ingredients comprising two or more particulate components. The resultant particles are usefully incorporated into powder coating compositions. The approach also finds utility in other applications, including but not limited to the food, drug, and cosmetics industry. Fluidized particles are subjected to an intense, but relatively brief heating event. This causes associated particles to fusingly assemble into fused composite clusters.

Abstract: A method for the production of foamable or foamed metal pellets, parts and panels. The method comprises the steps of: i) providing a mixture of a metal alloy powder with a foaming agent powder, ii) pre-compacting the mixture of step i); iii) heating the pre-compacted mixture of step ii) to a temperature below a decomposition temperature of the foaming and at which permanent bonding of the particles occurs v) hot compacting the body for producing a compacted body made of a metal matrix embedding the foaming agent; and vi) reducing the compacted body into metal fragments and thereby obtaining dense foamable metal chips. A method for the production of a foam metal using a closed volume metal shell is also disclosed.

Abstract: Objects comprising Al-7.5 Mg particulate having pressure consolidated nanocrystalline coating material are formed. Oxides of the coating material, in particulate form, may become dispersed in the pressure consolidated, thereby increasing its strength.

Abstract: A method of forming a sputtering target and other metal articles having controlled oxygen and nitrogen content levels and the articles so formed are described. The method includes surface-nitriding a deoxidized metal powder and further includes consolidating the powder by a powder metallurgy technique. Preferred metal powders include, but are not limited to, valve metals, including tantalum, niobium, and alloys thereof.

Abstract: Metal-metal or metal-ceramic/carbide composite materials are fabricated by combination of powder injection molding and infiltration. This is achieved by first forming a composite system having a matrix component and an infiltrant layer. The matrix component is formed from a metal or ceramic/carbide powder, that is of a higher melting point, admixed with a first binder. The infiltrant layer is formed from a metal powder, that is of a lower melting point, admixed with a second binder. The first and second binders are subsequently removed from the composite system during a debinding process. The composite system is then heated in a sintering furnace to coalesce the matrix component into a matrix phase having a network of interconnected pores, and to effect infiltration of the infiltrant layer into these pores to form the composite material of the present invention.