Patent application number | Description | Published |
20100021335 | METHOD AND MACHINE OF MAKING RARE-EARTH ALLOY GRANULATED POWDER AND METHOD OF MAKING RARE-EARTH ALLOY SINTERED BODY - A method of making a rare-earth alloy granulated powder according to the present invention includes the steps of: preparing a rare-earth alloy powder; generating remnant magnetization in the powder; and granulating the powder by utilizing agglomeration force produced by the remnant magnetization of the powder. Since the agglomeration force produced by the remnant magnetization is utilized, the addition of a granulating agent may be omitted. | 01-28-2010 |
20100045411 | R-T-B SINTERED MAGNET AND METHOD FOR PRODUCING THE SAME - An R-T-B based sintered magnet includes both a light rare-earth element R | 02-25-2010 |
20110025440 | R-T-B-TYPE SINTERED MAGNET AND METHOD FOR PRODUCTION THEREOF - An R-T-B based sintered magnet according to the present invention has a composition including: 27.3 mass % to 29.5 mass % of R; 0.92 mass % to 1 mass % of B; 0.05 mass % to 0.3 mass % of Cu; 0.02 mass % to 0.5 mass % of M; and T as the balance, and has an oxygen content of 0.02 mass % to 0.2 mass %. The main phase of the sintered magnet is an R | 02-03-2011 |
20110095855 | R-T-Cu-Mn-B TYPE SINTERED MAGNET - An R-T-Cu—Mn—B based sintered magnet includes: 12.0 at % to 15.0 at % of R, which is at least one of the rare-earth elements that include Y and of which at least 50 at % is Pr and/or Nd; 5.5 at % to 6.5 at % of B; 0.08 at % to 0.35 at % of Cu; 0.04 at % to less than 0.2 at % of Mn; at most 2 at % (including 0 at %) of M, which is one, two, or more elements that are selected from the group consisting of Al, Ti, V, Cr, Ni, Zn, Ga, Zr, Nb, Mo, Ag, In, Sn, Hf, Ta, W, Au, Pb and Bi; and T as the balance, which is either Fe alone or Fe and Co and of which at most 20 at % is Co if T includes both Fe and Co. | 04-28-2011 |
20120032764 | ALLOY FOR SINTERED R-T-B-M MAGNET AND METHOD FOR PRODUCING SAME - In order to make a sintered R-T-B-M magnet so that R | 02-09-2012 |
20120112863 | PROCESS FOR PRODUCTION OF R-T-B BASED SINTERED MAGNETS AND R-T-B BASED SINTERED MAGNETS - A method for producing a sintered R-T-B based magnet includes the steps of: providing a sintered R-T-B based magnet body | 05-10-2012 |
20130293328 | R-T-B SINTERED MAGNET - This sintered R-T-B based rare-earth magnet includes: R | 11-07-2013 |
20130299050 | METHOD OF PRODUCING R-T-B SINTERED MAGNET - A method for producing a sintered R-T-B based magnet according to the present invention includes the steps of: providing at least one sintered R-T-B based magnet material (where R is a rare-earth element and T is Fe or Fe and Co); providing RH diffusion sources, each of which includes a heavy rare-earth element RH (which is Dy and/or Tb) and 30 to 80 mass % of Fe and has a particle size of more than 53 μm and equal to or smaller than 5600 μm; performing an arrangement process to arrange the magnet material and the RH diffusion sources in a process vessel so that some of the RH diffusion sources are in contact with the magnet material; performing an RH diffusion process by carrying out a heat treatment in an inert ambient at a pressure of 5000 Pa or less and at a temperature of 800° C. to 1000° C. in the process vessel on the magnet material, with which some of the RH diffusion sources are in contact, and on the RH diffusion sources which are in contact, and out of contact, with the magnet material; and performing a separation process to separate the RH diffusion sources from the magnet material. | 11-14-2013 |
20140120248 | RH DIFFUSION SOURCE, AND METHOD FOR PRODUCING R-T-B-BASED SINTERED MAGNET USING SAME - [Problem] To provide a method for producing a sintered R-T-B based magnet which can get a heavy rare-earth element RH diffused efficiently inside a sintered R-T-B based magnet body. | 05-01-2014 |