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:
Jan. 30, 2001
Filed:
Nov. 29, 1999
David Earl Gay, Pendleton, IN (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A method for producing high-density powder metallurgy articles formed of hard powder materials, and particularly hard ferromagnetic materials that yield powder metallurgy magnets exhibiting improved magnetic properties as compared to powder metallurgy magnets formed of pure iron. The method generally entails the use of a powder of a material that is harder than iron, and then encapsulating each particle of the powder with a layer of iron. The powder is then compacted, by which the particles are adhered together to form a powder metallurgy article. As a result of forming a sufficiently thick encapsulating layer of iron on each powder particle, the powder can be compacted to a greater density than would be possible without the encapsulating layer of iron. If a ferromagnetic material is used, the resulting magnetic article is capable of exhibiting magnetic properties superior to a substantially identical pure iron powder metallurgy magnet.