Resonant ultrasound measurements of elastic constants in melt-spun R[sub 2]Fe[sub 14]B compounds (R=Ce, Pr, Nd, Er)
- Physics Department, General Motors NAO Research and Development Center, 30500 Mound Road, Warren, Michigan 48090-9055 (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Measurements are reported of the longitudinal and transverse elastic moduli of the R[sub 2]Fe[sub 14]B compounds having rare-earth component R=Ce, Pr, Nd, and Er. A resonant ultrasound technique was used to determine the elastic constants on hot-pressed, melt-spun samples which are essentially isotropic, polycrystalline specimens of the four compounds. The results for Nd[sub 2]Fe[sub 14]B, which agree well with previous studies, and Er[sub 2]Fe[sub 14]B exhibit clear signatures of the spin reorientations which occur in those compounds. No such signature appears in the data for Pr[sub 2]Fe[sub 14]B, consistent with the fact that no spin reorientation occurs in that material. The ultrasonic attenuation of each sample has also been measured and it has been found that it shows features in the vicinity of spin reorientations (Nd[sub 2]Fe[sub 14]B, Er[sub 2]Fe[sub 14]B) and the Curie point (Ce[sub 2]Fe[sub 14]B).
- OSTI ID:
- 7072626
- Journal Information:
- Journal of Applied Physics; (United States), Vol. 75:10; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CERIUM BORIDES
ELASTICITY
ERBIUM BORIDES
IRON BORIDES
NEODYMIUM BORIDES
PRASEODYMIUM BORIDES
RARE EARTH COMPOUNDS
SPIN ORIENTATION
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
ULTRASONIC WAVES
BORIDES
BORON COMPOUNDS
CERIUM COMPOUNDS
ERBIUM COMPOUNDS
IRON COMPOUNDS
MECHANICAL PROPERTIES
NEODYMIUM COMPOUNDS
ORIENTATION
PRASEODYMIUM COMPOUNDS
SOUND WAVES
TEMPERATURE RANGE
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360203* - Ceramics
Cermets
& Refractories- Mechanical Properties