Abstract:
PROBLEM TO BE SOLVED: To provide an iron-based sintered material which has an electrodeposition coating film having superior adhesiveness and no defect therein formed on the surface of the iron-based sintered material having pores therein, and is superior in corrosion resistance; a manufacturing method therefor; particularly a fixing case for a cylinder lock device composed of iron-based sintered parts superior in corrosion resistance; and a manufacturing method therefor. SOLUTION: The iron-based sintered material is manufactured by the steps of: forming an iron oxide layer on the surface of the iron-based sintered material by steam treatment to seal the coarse pores in the sintered material; and covering the surface having the iron oxide layer formed thereon with the electrodeposition coating film. A cationic electrodeposition coating method is preferably used for the electrodeposition coating. An epoxy-based resin paint is preferably used for the cationic paint, particularly when high corrosion resistance is required, and an acrylic resin paint is preferably used, when weatherability is required. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
The invention concerns a method of improving the properties of a hydrogen storage alloy powder for a negative electrode of a rechargeable nickel hydride battery. The method comprises the steps of hydriding a powdered alloy starting material, oxidizing the obtained hydride alloy powder and washing the oxidized powder. The invention also concerns the obtained powder.
Abstract:
There are provided reactive metal powder atomization manufacturing processes. For example, such processes include providing a heated metal source and contact the heated metal source with at least one additive gas while carrying out the atomization process. Such processes provide raw reactive metal powder having improved flowability. The at least one additive gas can be mixed together with an atomization gas to obtain an atomization mixture, and the heated metal source can be contacted with the atomization mixture while carrying out the atomization process. Reactive metal powder spheroidization manufacturing processes are also provided.
Abstract:
The invention relates to a method for producing a permanent magnet comprising a rare earth element, wherein a starting material is processed in a metal injection molding method and a rare earth metal present in the starting material is converted into an inertised compound prior to a binder removal step.
Abstract:
A dielectric barrier discharge (DBD) plasma apparatus for synthesizing metal particles is provided. The DBD plasma apparatus includes an electrolyte vessel for receiving an electrolyte solution comprising metal ions; an electrode spaced-apart from the electrolyte vessel; a dielectric barrier interposed between the electrolyte vessel and the electrode such that, when the electrolyte solution is present in the electrolyte vessel, the dielectric barrier and an upper surface of the electrolyte solution are spaced-apart from each other and define a discharge area therebetween; and gas inlet and outlet ports in fluid communication with the discharge area such that supplying gas in the discharge area while applying an electrical potential difference between the electrode and the electrolyte solution cause a plasma to be produced onto the electrolyte solution, the plasma interacting with the metal ions and synthesizing metal particles. A method for synthesizing metal particles using a DBD plasma apparatus is also provided.
Abstract:
An interconnector for a solid oxide fuel cell is manufactured by single-press compacting a powder blend to form a green interconnector with a desired shape of a final interconnector. The powder blend includes chromium and iron, and may include an organic lubricant. At least 50 wt% or more of an iron portion of the powder blend comprises iron particles smaller than 45 um. The green interconnector is then sintered and oxidized to form the final interconnector. The oxidation step occurs in a continuous flow furnace in which a controlled atmosphere (e.g., humidified air) is fed into the furnace in the travel direction of the interconnector. The final interconnector comprises at least 90 wt% chromium, at least 3 wt% iron, and less than 0.2 wt% nitrogen. An average density within a flow field of the final interconnector may be less than 6.75 g/cc.
Abstract:
The invention relates to a process for producing sinterable molybdenum metal powder in a moving bed, sinterable molybdenum powder and its use.