Patent application number | Description | Published |
20090019969 | R-T-B SYSTEM SINTERED MAGNET - An R-T-B system sintered magnet is provided which achieves both a high residual magnetic flux density and a high coercive force. The R-T-B system sintered magnet comprises main-phase grains | 01-22-2009 |
20090178735 | RARE EARTH SINTERED MAGNET - The present invention provides a technique to improve an adhesion strength between a magnet main body and a protective film. The rare earth sintered magnet of the present invention comprises a magnet main body of a sintered body containing a rare earth element and a protective film formed on the magnet main body, wherein the ratio of a 10-point average surface roughness Rz of the magnet main body on which the protective film is formed to a mean grain size D50 in the magnet main body (Rz/D50 ratio) is kept in a range from 0.20 to 10.00, inclusive. This gives the rare earth sintered magnet which is coated with the protective film having a high adhesion strength of 100 N/m or more and exhibits high corrosion resistance. | 07-16-2009 |
20100040501 | R-T-B Based Rare Earth Permanent Magnet and Method for Production Thereof - An R-T-B system rare earth permanent magnet, which comprises at least main phase grains consisting essentially of R | 02-18-2010 |
20100111746 | RAW MATERIAL ALLOY FOR R-T-B SYSTEM SINTERED MAGNET, R-T-B SYSTEM SINTERED MAGNET AND PRODUCTION METHOD THEREOF - It is an object of the present invention to obtain a highly coercive R-T-B system sintered magnet by making the crystal microstructure of a raw material alloy prepared by strip casting more uniform, thereby making the crushed powder obtained from such raw material alloy more fine and making the size distribution more narrow. The present invention provides a raw material alloy for an R-T-B system sintered magnet containing grains of an R | 05-06-2010 |
20110274898 | Method for Producing Sintered Magnet and alloy for sintered magnet - The present invention provides a method for producing a sintered magnet, which can have a sufficient sintered density even when the magnet has a low-R composition. The method is for producing a sintered magnet comprising R (R: one or more rare-earth elements), T (T: one or more transition metal elements essentially comprising Fe, or Fe and Co) and B (boron) as the main components, wherein a starting alloy prepared by strip casting is pulverized to a given particle size to form a fine powder, where the starting alloy comprises discolored deposit | 11-10-2011 |
20140247100 | R-T-B SINTERED MAGNET AND METHOD FOR PRODUCTION THEREOF, AND ROTARY MACHINE - An R-T-B sintered magnet | 09-04-2014 |
20140286815 | R-T-B BASED ALLOY STRIP, AND R-T-B BASED SINTERED MAGNET AND METHOD FOR PRODUCING SAME - An R-T-B based alloy strip containing dendritic crystals including a R | 09-25-2014 |
20140286816 | R-T-B BASED SINTERED MAGNET AND PRODUCTION METHOD FOR SAME, AND ROTARY MACHINE - An R-T-B sintered magnet including a composition containing a rare earth element, a transition element and boron, containing essentially no dysprosium as a rare earth element, and having crystal grains with a composition containing a rare earth element, a transition element and boron, and grain boundary regions formed between the crystal grains, wherein the triple point regions which are grain boundary regions surrounded by 3 or more crystal grains have a composition containing a rare earth element, a transition element and boron and have a higher mass ratio of the rare earth element than the crystal grains, the average value of the area of the triple point regions in a cross-section being no greater than 2 μm | 09-25-2014 |
20140290803 | RARE EARTH BASED MAGNET - The present invention provides a rare earth based magnet including R | 10-02-2014 |
20140292453 | RARE EARTH BASED MAGNET - The present invention provides a rare earth based magnet that inhibits the high temperature demagnetization rate even when less or no heavy rare earth elements such as Dy, Tb and the like are used. The rare earth based magnet according to the present invention includes R | 10-02-2014 |
20140292454 | RARE EARTH BASED MAGNET - The present invention provides a rare earth based magnet having a microstructure in which in a section of the R | 10-02-2014 |
20140308152 | R-T-B BASED ALLOY STRIP, AND R-T-B BASED SINTERED MAGNET AND METHOD FOR PRODUCING SAME - An R-T-B based alloy strip including columnar crystals of an R | 10-16-2014 |
20140335268 | RARE EARTH SINTERED MAGNET, METHOD FOR PRODUCING SAME, MOTOR AND AUTOMOBILE - A rare earth sintered magnet | 11-13-2014 |