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. 06, 2010
Filed:
Mar. 07, 2008
Kazuaki Sakaki, Takefu, JP;
Koji Sato, Takefu, JP;
Takahiro Hashimoto, Takefu, JP;
Hajime Nakamura, Takefu, JP;
Takehisa Minowa, Takefu, JP;
Kazuaki Sakaki, Takefu, JP;
Koji Sato, Takefu, JP;
Takahiro Hashimoto, Takefu, JP;
Hajime Nakamura, Takefu, JP;
Takehisa Minowa, Takefu, JP;
Shin-Etsu Chemical Co., Ltd., Chiyoda-ku, Tokyo, JP;
Abstract
A rare-earth alloy ingot is produced by melting an alloy composed of 20-30 wt % of a rare-earth constituent which is Sm alone or at least 50 wt % Sm in combination with at least one other rare-earth element, 10-45 wt % of Fe, 1-10 wt % of Cu and 0.5-5 wt % of Zr, with the balance being Co, and quenching the molten alloy in a strip casting process. The strip-cast alloy ingot has a content of 1-200 μm size equiaxed crystal grains of at least 20 vol % and a thickness of 0.05-3 mm. Rare-earth sintered magnets made from such alloys exhibit excellent magnetic properties and can be manufactured under a broad optimal temperature range during sintering and solution treatment.