Magnetic and mechanical properties of consolidated gas atomized and hydrogenation, disproportionation, desorption, and recombination Nd{sub 2}Fe{sub 14}B powders (abstract)

Journal Article · Tue Apr 01 04:00:00 EST 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.364976· OSTI ID:496488

Horton, J A; Heatherly, L ^[1]; Sellers, C H; Branagan, D J ^[2]; Ragg, O; Harris, I R ^[3]

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1. Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6115 (United States)
2. Idaho National Engineering Lab, Idaho Falls, Idaho 83415-2211 (United States)
3. University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom)

Magnetic and mechanical properties of consolidated (hot pressed) gas atomized powders of Nd{sub 2}Fe{sub 14}B with TiC additions will be reported and the results correlated with microstructure. The fracture toughnesses obtained will be compared with similar tests on hot pressed hydrogenation, disproportionation, desorption, and recombination (HDDR) material, made by the HDDR process and with previously reported results on a variety of commercially available materials. TiC additions, by controlling grain growth, aid the gas atomization process and should result in better processability of consolidated magnets. Improvements in the fracture toughness and processability may lead to the use of the Nd{sub 2}Fe{sub 14}B magnets in special situations where it is necessary for the magnet to be highly stressed. For example, in electric vehicle drive motors, high rpm and small clearances preclude the use of supporting elements and result in high tensile forces on the magnet. {copyright} {ital 1997 American Institute of Physics.}

• Research Organization: Oak Ridge National Laboratory
• DOE Contract Number: AC05-96OR22464; AC07-94ID13223
• OSTI ID: 496488
• Report Number(s): CONF-961141--
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 8 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BORON ALLOYS
FERROMAGNETIC MATERIALS
FRACTURE PROPERTIES
GRAIN GROWTH
GRAIN SIZE
HOT PRESSING
IRON ALLOYS
MAGNETIC PROPERTIES
MECHANICAL PROPERTIES
MICROSTRUCTURE
NEODYMIUM ALLOYS
PERMANENT MAGNETS
POWDERS
TITANIUM ALLOYS
TITANIUM CARBIDES