Japan, Sept. 16 -- PROTERIAL LTD has got intellectual property rights for 'METHOD OF PRODUCING R-T-B SINTERED MAGNET.' Other related details are as follows:
Application Number: JP,2022-152852
Category (FI): C22C28/00@A,H01F41/02@G,B22F3/24@K,B22F3/00@F,C22C38/00,303@D,H01F1/057,170
Stage: PROBLEM TO BE SOLVED: To provide a method of producing an R-T-B sintered magnet, capable of easily controlling an amount of adhesion of a diffusion source.SOLUTION: A method includes: a step of preparing an R-T-B sintered magnet material; a step of preparing diffusion source powder containing one or more selected from a group consisting of RH alloy particles and RLM alloy particles; a step of providing, on at least one surface of the R-T-B sintered magnet material, an adhesion area 2 where the diffusion source powder is adhered and a non-adhesion area 3 where the diffusion source powder is not adhered; and a step of heating the R-T-B sintered magnet material, on which the diffusion source powder is adhered, to a temperature above 600degC and a temperature equal to or below a sintering temperature of the R-T-B sintered magnet material. The whole of the non-adhesion area in the step of providing the adhesion area where the diffusion source powder is adhered and the non-adhesion area where the diffusion source powder is not adhered is included in an area where the surface distance from the adhesion area is less than 0.75 mm, when the diffusion source powder contains the RH alloy particles, and the whole of the non-adhesion area is included in an area where the surface distance from the adhesion area is 2.50 mm or less, when the diffusion source powder does not contain the RH alloy particles.SELECTED DRAWING: Figure 1B (Grant)
Filing Date: Sept. 26, 2022
Publication Date: April 5, 2024
The original document can be viewed at: https://www.j-platpat.inpit.go.jp/p0100
Disclaimer: Curated by HT Syndication.
