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:
Mar. 23, 2004
Filed:
Sep. 19, 2001
Aichi Steel Corporation, Tokai, JP;
Abstract
This invention aims to provide a manufacturing method of an anisotropic magnet powder from which a bonded magnet with an improved loss of magnetization due to structural changes can be achieved. This is achieved by employing a low-temperature hydrogenation process, high-temperature hydrogenation process and the first evacuation process to an RFeB material (R: rare earth element) to manufacture a hydride powder (RFeBHx); the obtained RFeBHx powder (the precursory anisotropic magnet powder) is subsequently blended with a diffusion powder composed of hydride of dysprosium or the like and a diffusion heat-treatment process and a dehydrogenation process are employed. Through this series of processes, an anisotropic magnet powder with a great coercivity and a great degree of anisotropy can be achieved.