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. 13, 2010
Filed:
Oct. 22, 2003
Kenichiro Nakajima, Chichibu, JP;
Kenichiro Nakajima, Chichibu, JP;
Showda Denko K.K., Minato-ku, Tokyo, JP;
Abstract
A method for producing an RE-containing alloy represented by formula R(TA)13(wherein R represents Ce, etc.; T represents Fe, etc.; and A represents Al, etc; 0.05≦x≦0.2; and −1≦y≦1) including a melting step of melting alloy raw materials at 1,200 to 1,800° C.; and a solidification step of rapidly quenching the molten metal produced through the above step, to thereby form the first RE-containing alloy, wherein the solidification step is performed at a cooling rate of 10to 10° C./second, as measured at least within a range of the temperature of the molten metal to 900° C.; and an RE-containing alloy, which is represented by a compositional formula of RTA(wherein R and A represent the same meaning as above, T represents Fe, etc.; 5.0 at. %≦r≦6.8 at. %, 73.8 at. %≦t≦88.7 at. %, and 4.6 at. %≦a≦19.4 at. %) and has an alloy microstructure containing an NaZn-type crystal structure in an amount of at least 85 mass % and α-Fe in an amount of 5-15 mass % inclusive.