Preparation and TEM-study of sintered Nd[sub 18]Fe[sub 74]B[sub 6]Ga[sub 1]Nb[sub 1] magnets
Conference
·
· IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)
OSTI ID:7000451
- T.U. Vienna (Austria). Institute of Applied and Technical Physics
- Max-Planck-Institut fuer Metallforschung, Stuttgart (Germany). Institut fuer Physik
Ga-doped Nd-Fe-B sintered magnets show an improved wetting behavior of the liquid phase during sintering and the formation of additional Ga-containing intergranular phases. Nb forms precipitates within the hard magnetic phase and an intergranular boride-phase. This improves the separation and decoupling of the hard magnetic grains and enhances the coercivity. In the as-sintered magnets the authors find a new Nd-rich Ga-containing region which contains Nd[sub 3]Ga and Nd[sub 5]Ga[sub 3]. This region is formed from the liquid phase during cooling. In addition the [delta]-phase occurs in the annealed magnets. Nb is found in the hexagonal NbFeB intergranular boride and in small Nb-containing precipitates within the hard magnetic phase. There is no Nb detected in the Nd-rich phases.
- OSTI ID:
- 7000451
- Report Number(s):
- CONF-930416--
- Conference Information:
- Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 29:6Pt1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
360104 -- Metals & Alloys-- Physical Properties
42 ENGINEERING
420200 -- Engineering-- Facilities
Equipment
& Techniques
ALLOYS
BORON ALLOYS
DATA
ELECTRON MICROSCOPY
EXPERIMENTAL DATA
FABRICATION
GALLIUM ALLOYS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC PROPERTIES
MAGNETS
MICROSCOPY
MICROSTRUCTURE
NEODYMIUM ALLOYS
NIOBIUM ALLOYS
NUMERICAL DATA
PERMANENT MAGNETS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
SINTERING
TRANSMISSION ELECTRON MICROSCOPY
WETTABILITY
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
360104 -- Metals & Alloys-- Physical Properties
42 ENGINEERING
420200 -- Engineering-- Facilities
Equipment
& Techniques
ALLOYS
BORON ALLOYS
DATA
ELECTRON MICROSCOPY
EXPERIMENTAL DATA
FABRICATION
GALLIUM ALLOYS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC PROPERTIES
MAGNETS
MICROSCOPY
MICROSTRUCTURE
NEODYMIUM ALLOYS
NIOBIUM ALLOYS
NUMERICAL DATA
PERMANENT MAGNETS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
SINTERING
TRANSMISSION ELECTRON MICROSCOPY
WETTABILITY