SINTER MAGNET MADE FROM RARE EARTH-IRON-BORON ALLOY POWDER FOR MAGNET

Title:

SINTER MAGNET MADE FROM RARE EARTH-IRON-BORON ALLOY POWDER FOR MAGNET

Document Type and Number:

WIPO Patent Application WO/2003/066922

Kind Code:

A1

Abstract:

A rare earth-iron-boron alloy powder in which heavy rare earth elements such as dysprosium are present in the main phase in a relatively higher concentration than in a grain boundary phase and which can be easily sintered; and a process for producing the powder. The rare earth-iron-boron alloy for magnets contains, as the main phase, R₂Fe₁₄B-form crystals having a rare-earth-rich phase dispersed therein (R is at least one element selected from the group consisting of rare earth elements and yttrium), the main phase containing dysprosium and/or terbium in a higher concentration than in the grain boundary phase.

Inventors:

TOMIZAWA HIROYUKI (JP)
KANEKO YUJI (JP)
ODAKA TOMOORI (JP)

Application Number:

PCT/JP2003/001143

Publication Date:

August 14, 2003

Filing Date:

February 04, 2003

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SUMITOMO SPEC METALS (JP)
TOMIZAWA HIROYUKI (JP)
KANEKO YUJI (JP)
ODAKA TOMOORI (JP)

International Classes:

B22F1/00; B22F9/04; C22C1/04; B22D11/06; C22C19/07; C22C33/02; C22C38/00; C22C38/06; C22C38/10; C22C38/16; H01F1/053; H01F1/057; H01F1/06; H01F41/02; (IPC1-7): C22C38/00; C22C33/02

Domestic Patent References:

WO2002018078A2

2002-03-07

Foreign References:

JPH0813078A	1996-01-16
JPH06124824A	1994-05-06

Other References: