Structural and magnetic properties of melt-spun rare earth-iron-boron alloys
Abstract
Intrinsic coercivities and energy products as large as 20 kOe and 14 MGOe, respectively, have been observed in Nd Fe-B alloys prepared by melt-spinning. X-ray diffraction work indicates that the materials are comprised primarily of a new, tetragonal, rare earth-iron-boron phase. The precise stoichiometry and detailed crystal structure of this phase have been determined by Rietveld analyses of neutron powder diffraction data. The compound is R{sub 2}Fe{sub 14}B, having the P4{sub 2}/mnm space group symmetry. The structure contains puckered, hexagonal nets reminiscent of those characterizing hexagonal R-Co magnetic compounds. Very interestingly, the boron atoms reside at the centers of trigonal prisms, which are fundamental structural units of many transition metal-metalloid systems, both crystalline and amorphous. Relationships between the crystal structure and intrinsic magnetic properties are discussed.
- Authors:
-
- General Motors Research Laboratories, Warren, MI (USA)
- OSTI Identifier:
- 5442884
- Report Number(s):
- CONF-840909-
Journal ID: ISSN 0197-1689; CODEN: TMPSA
- Resource Type:
- Conference
- Journal Name:
- TMS (The Metallurgical Society) Paper Selection; (USA)
- Additional Journal Information:
- Journal Volume: 56; Conference: TMS-AIME fall meeting, Detroit, MI (USA), 16-20 Sep 1984; Journal ID: ISSN 0197-1689
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; BORON ALLOYS; CRYSTAL STRUCTURE; MAGNETIC PROPERTIES; IRON ALLOYS; NEODYMIUM ALLOYS; HEXAGONAL LATTICES; NEUTRON DIFFRACTION; STOICHIOMETRY; TETRAGONAL LATTICES; X-RAY DIFFRACTION; ALLOYS; COHERENT SCATTERING; CRYSTAL LATTICES; DIFFRACTION; PHYSICAL PROPERTIES; RARE EARTH ALLOYS; SCATTERING; 360102* - Metals & Alloys- Structure & Phase Studies; 360104 - Metals & Alloys- Physical Properties
Citation Formats
Herbst, J F. Structural and magnetic properties of melt-spun rare earth-iron-boron alloys. United States: N. p.,
Web.
Herbst, J F. Structural and magnetic properties of melt-spun rare earth-iron-boron alloys. United States.
Herbst, J F. .
"Structural and magnetic properties of melt-spun rare earth-iron-boron alloys". United States.
@article{osti_5442884,
title = {Structural and magnetic properties of melt-spun rare earth-iron-boron alloys},
author = {Herbst, J F},
abstractNote = {Intrinsic coercivities and energy products as large as 20 kOe and 14 MGOe, respectively, have been observed in Nd Fe-B alloys prepared by melt-spinning. X-ray diffraction work indicates that the materials are comprised primarily of a new, tetragonal, rare earth-iron-boron phase. The precise stoichiometry and detailed crystal structure of this phase have been determined by Rietveld analyses of neutron powder diffraction data. The compound is R{sub 2}Fe{sub 14}B, having the P4{sub 2}/mnm space group symmetry. The structure contains puckered, hexagonal nets reminiscent of those characterizing hexagonal R-Co magnetic compounds. Very interestingly, the boron atoms reside at the centers of trigonal prisms, which are fundamental structural units of many transition metal-metalloid systems, both crystalline and amorphous. Relationships between the crystal structure and intrinsic magnetic properties are discussed.},
doi = {},
url = {https://www.osti.gov/biblio/5442884},
journal = {TMS (The Metallurgical Society) Paper Selection; (USA)},
issn = {0197-1689},
number = ,
volume = 56,
place = {United States},
year = {},
month = {}
}