Patent application number | Description | Published |
20120176212 | METHOD AND SYSTEM FOR PRODUCING SINTERED NdFeB MAGNET, AND SINTERED NdFeB MAGNET PRODUCED BY THE PRODUCTION METHOD - A method and system for producing a slim-shaped sintered NdFeB magnet having a high level of coercive force and high degree of orientation, as well as a sintered NdFeB magnet produced by the aforementioned method or system. A system for producing a slim-shaped sintered NdFeB magnet according to the present invention includes: a filling unit and filling alloy powder; an orienting unit; a sintering furnace; and a conveying unit. The orienting unit is provided with a heating and orienting coil for heating the alloy powder in the molds before and/or after the application of the magnetic field so as to decrease the coercive force of the individual particles of the alloy powder. | 07-12-2012 |
20140062631 | NdFeB SYSTEM SINTERED MAGNET - A NdFeB system sintered magnet produced by the grain boundary diffusion method and has a high coercive force and squareness ratio with only a small decrease in the maximum energy product. A NdFeB system sintered magnet having a base material produced by orienting powder of a NdFeB system alloy and sintering the powder, with Dy and/or Tb (the “Dy and/or Tb” is hereinafter called R | 03-06-2014 |
20140062632 | NdFeB SYSTEM SINTERED MAGNET - A NdFeB system sintered magnet produced by the grain boundary diffusion method that has a high coercive force and squareness ratio with only a small decrease in the maximum energy product. The NdFeB system sintered magnet has a base material produced by orienting powder of a NdFeB system alloy and sintering the powder, with Dy and/or Tb (the “Dy and/or Tb” is hereinafter called R | 03-06-2014 |
20140118098 | NDFEB SYSTEM SINTERED MAGNET - A NdFeB system sintered magnet according to the present invention is a NdFeB system sintered magnet having a base material produced by orienting powder of a NdFeB system alloy and sintering the powder, with Dy and/or Tb (the “Dy and/or Tb” is hereinafter called R | 05-01-2014 |
20140327503 | NDFEB SYSTEM SINTERED MAGNET AND METHOD FOR PRODUCING THE SAME - Provided is a NdFeB sintered magnet which can be used in the grain boundary diffusion method as a base material in which R | 11-06-2014 |
20150041022 | METHOD FOR PRODUCING NDFEB SYSTEM SINTERED MAGNET - A method for producing a NdFeB system sintered magnet in which a coating material containing a heavy rare-earth element R | 02-12-2015 |
20150059525 | NdFeB SYSTEM SINTERED MAGNET - The NdFeB system sintered magnet according to the present invention is a NdFeB system sintered magnet produced by diffusing Dy and/or Tb which are/is attached to a surface of a base material produced by orienting powder of a NdFeB system alloy in a magnetic field, and sintering the powder of the NdFeB system alloy, into grain boundaries inside the base material by grain boundary diffusion treatment, wherein a squareness ratio is equal to or higher than 95%. The NdFeB system sintered magnet can be produced by producing a base material of the NdFeB system sintered magnet by using a NdFeB system alloy with lamellas of a rare-earth rich phase dispersed substantially uniformly at predetermined spaces, as a starting alloy, and causing the alloy to occlude hydrogen, without performing heating for desorbing the occluded hydrogen thereafter until a sintering process, and applying grain boundary diffusion treatment to the base material. | 03-05-2015 |
20150125336 | METHOD FOR PRODUCING NdFeB SYSTEM SINTERED MAGNET - A method for producing a NdFeB system sintered magnet. The method includes: a hydrogen pulverization process, in which coarse powder of a NdFeB system alloy is prepared by coarsely pulverizing a lump of NdFeB system alloy by making this lump occlude hydrogen; a fine pulverization process, in which fine powder is prepared by performing fine pulverization for further pulverizing the coarse powder; a filling process, in which the fine powder is put into a filling container; an orienting process, in which the fine powder in the filling container is oriented; and a sintering process, in which the fine powder after the orienting process is sintered as held in the filling container. The processes from hydrogen pulverization through orienting are performed with neither dehydrogenation heating nor evacuation each for desorbing hydrogen occluded in the hydrogen pulverization process. The processes from hydrogen pulverization through sintering are performed in an oxygen-free atmosphere. | 05-07-2015 |