The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 2007
Filed:
Mar. 29, 2002
Hitoshi Morimoto, Hyogo, JP;
Yuji Kaneko, Uji, JP;
Hitoshi Morimoto, Hyogo, JP;
Yuji Kaneko, Uji, JP;
Neomax Co., Ltd., Osaka-shi, JP;
Abstract
A rare earth alloy sintered compact includes a main phase represented by (LRHR)TA, where T is Fe with or without non-Fe transition metal element(s); A is boron with or without carbon; LR is a light rare earth element; HR is a heavy rare earth element; and 0<x<1. The sintered compact is produced by preparing multiple types of rare earth alloy materials including respective main phases having different HR mole fractions, mixing the alloy materials so that the sintered compact will include sintering a main phase having an average composition represented by (LRHR)TA, thereby obtaining a mixed powder, and the mixed powder. The alloy materials include first and second rare earth alloy materials represented by (LRHR)TA (where 0≦μ&<x) and (LRHR)TA (where x<v≦1) and including a rare earth element R(=LR+HR) at R1 and R2 (at%), respectively. Δ=|R1−R2| is about 20% or less of (R1+R2)/2.