R-T-B-BASE ALLOY, PROCESS FOR PRODUCING R-T-B-BASE ALLOY, FINE POWDER FOR R-T-B-BASE RARE EARTH PERMANENT MAGNET, R-T-B-BASE RARE EARTH PERMANENT MAGNET, AND PROCESS FOR PRODUCING R-T-B-BASE RARE EARTH PERMANENT MAGNET

Title:

Document Type and Number:

Japanese Patent JP2009249729

Kind Code:

A

Abstract:

To provide an R-T-B-base alloy in which concentration of Dy is high, whose pulverization property is not reduced as well, and which is made into the raw material of a rare earth permanent magnet having excellent magnetic properties.

Disclosed is the R-T-B-base alloy that is a raw material to be used for the rare earth permanent magnet. In the R-T-B-base alloy, R contains not less than 20% by mass of Dy, and diffraction peaks appear at 31.1 to 31.3 and 37.8 to 38.0 as measured by X-ray diffractometry (2/) using CuK.

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Inventors:

NAKAJIMA KENICHIRO

Application Number:

JP2008102600A

Publication Date:

October 29, 2009

Filing Date:

April 10, 2008

Export Citation:

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Assignee:

SHOWA DENKO KK

International Classes:

C22C38/00; B22D7/00; B22D11/00; B22D11/06; B22D13/00; B22D27/04; B22F9/04; C21D6/00; H01F1/053; H01F1/06; H01F41/02

Domestic Patent References:

JP2005286175A	2005-10-13
JP2007067419A	2007-03-15
JP2007284738A	2007-11-01

Attorney, Agent or Firm:

Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama

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