Published February 1, 2009 | Version v1
Journal article Metadata-only

Coercivity enhancement of Nd-Fe-B sintered magnets by grain boundary modification via reduction-diffusion process

Creators

  • 1. Center for Advanced Science and Innovation, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871 (Japan)

Description

The interface between the Nd2Fe14B particles and the grain boundary surrounding them in Nd-Fe-B sintered magnets was modified by diffusion Dy metal selectively through the grain boundary involving the reduction of Dy2O3 or DyF3 with CaH2 and the coercivity of them was effectively enhanced from 0.98 MA/m to 1.42 MA/m with keeping the high value of remanence. The resultant coercivity was higher than that of the magnets modified with Dy2O3 (HcJ = 1.10 MA/m) and DyF3 (HcJ = 1.24 MA/m) without using any reductant such as CaH2, respectively.

Availability note (English)

Available from http://dx.doi.org/10.1088/1757-8981/1/1/012020

Additional details

Identifiers

DOI
10.1088/1757-8981/1/1/012020;

Publishing Information

Journal Title
IOP Conference Series. Materials Science and Engineering (Online)
Journal Volume
1
Journal Issue
1
Journal Page Range
[4 p.]
ISSN
1757-899X

Conference

Title
AA. rare-earth related material processing and functions
Acronym
IUMRS-ICA 2008 symposium
Dates
9-13 Dec 2008
Place
Nagoya (Japan)

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
41053852
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
CALCIUM HYDRIDES; COERCIVE FORCE; DIFFUSION; DYSPROSIUM FLUORIDES; DYSPROSIUM OXIDES; GRAIN BOUNDARIES; INTERFACES; MAGNETS; REDUCTION
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; DYSPROSIUM COMPOUNDS; EQUIPMENT; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; HYDRIDES; HYDROGEN COMPOUNDS; MICROSTRUCTURE; OXIDES; OXYGEN COMPOUNDS; RARE EARTH COMPOUNDS