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:
Sep. 17, 1991
Filed:
Apr. 27, 1990
Nippon Steel Corporation, Tokyo, JP;
Abstract
A powder X formed by quenching a molten alloy containing, on an atomic percent basis, at least 8%, but less than 13%, of a rare earth component consisting mainly of one or both of neodymium and praseodymium, and 4 to 8% of boron, the balance of its composition being iron and unavoidable impurities, and a powder Y formed by quenching a molten alloy containing, on an atomic percent basis, 13 to 20% of a rare earth component consisting mainly of one or both of neodymium and praseodymium, and 4 to 8% of boron, the balance of its composition being iron and unavoidable impurities, are mixed to prepare a mixture containing 5 to 50% by volume of powder Y. The mixture is subjected to heat and pressure to make a rare earth magnet containing, on an atomic percent basis, 9 to 14% of a rare earth component consisting mainly of one or both of neodymium and praseodymium, and 4 to 8% of boron, the balance of its composition being iron and unavoidable impurities.