Patent · US Active

Rare earth magnet and method for manufacturing same

US9903009B2 · kind B2 · utility

0Cited by

5References

8Claims

0Family size

Assignee

TDK CORPORATION · JP

Inventors

Masashi Miwa · Tokyo, JP
Takeshi Sakamoto · Tokyo, JP
Jun Hagiwara · Tokyo, JP
Masami Mori · Tokyo, JP

Key dates

Filing date	Jan 17, 2012
Grant date	Feb 27, 2018
Priority date	—
Expiry date	May 16, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31678
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A rare-earth element including a magnet body containing a rare-earth element, and a protective layer formed on a surface of the magnet body. The protective layer may include a first layer covering the magnet body and containing a rare-earth element, and a second layer covering the first layer and containing substantially no rare-earth element. Another protective layer in accordance may include an inner protective layer and an outer protective layer successively from the magnet body side. The outer protective layer is any of an oxide layer, a resin layer, a metal salt layer, and a layer containing an organic-inorganic hybrid compound.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.