MICROSTRUCTURE, MAGNETIC-PROPERTIES, AND CORROSION BEHAVIOR OF THE COPPER-DOPED ND-FE-B SINTERED MAGNETS

Authors
SZYMURA S BALA H STOKLOSA H SERGEEV VV
Citation
S. Szymura et al., MICROSTRUCTURE, MAGNETIC-PROPERTIES, AND CORROSION BEHAVIOR OF THE COPPER-DOPED ND-FE-B SINTERED MAGNETS, Physica status solidi. a, Applied research, 137(1), 1993, pp. 179-188
Citations number
25
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica status solidi. a, Applied research → ACNP
ISSN journal
00318965
Volume
137
Issue
1
Year of publication
1993
Pages
179 - 188
Database
ISI
SICI code
0031-8965(1993)137:1<179:MMACBO>2.0.ZU;2-Q
Abstract
The effect of Cu addition to the three-component Nd-Fe-B sintered perm anent magnet on the phase structure, magnetic properties. and corrosio n behaviour is analyzed. It is found that this addition changes the co mposition of the grain-boundary Nd-rich phase to NdCu2. NdFe, and eute ctic phases. The latter two phases deteriorate the hard magnetic prope rties due to a decrease of isolation and decoupling of the Nd2Fe14B gr ains and a decrease of the volume fraction of the hard magnetic Nd2Fe1 4B phase. The corrosion resistance of the Nd-Fe-B magnet in acid solut ion and under conditions corresponding to the industrial atmosphere is improved by addition of this element.