High coercivity melt-spun Nd sub 10--11. 5 Fe sub 82--84 B sub 2--5 M sub 1--6 alloys (M=Ti/V/Mo/Al) (abstract)
- Materials Research Laboratory, ITRI, Chutung, 310 Taiwan (Republic of China)
- Department of Materials Science and Engineering, Tsing Hua University, Hsinchu, 300, Taiwan (Republic of China)
In an alloy design to precipitate the hard Nd{sub 2}Fe{sub 14}B (2-14-1) in the NdFe{sub 11}M (1-12 phase, M is one of Ti/V/Mo/Al) matrix, different ratios of the 2-14-1 composition were added into the 1-12 compositions and prepared by melt spinning. It resulted in high-coercivity Nd-Fe-B-M alloys (M is Ti/V/Mo/Al) with Nd and B composition less than the stoichiometric 2-14-1 compound, yet with promising intrinsic coercivity ({sub {ital i}H{ital c}}) of up to 12 kOe after suitable annealing. XRD analyses showed that for the alloys with higher iron lower in both Nd and B, the matrix is 1-12 and alpha-iron, while for the alloys with higher Nd and B, the 2-14-1 is competitive with other phases. The {sub {ital i}H{ital c}} vs temperature fitting of a Nd{sub 10}Fe{sub 83.1}B{sub 2.7}Ti{sub 4.2} alloy ({sub {ital i}H{ital c}}=80 kA/m at 293 K) shows weak pinning, while that of a Nd{sub 10.8}Fe{sub 82.9}B{sub 4.4}Ti{sub 1.9} alloy ({sub {ital i}H{ital c}}=900 kA/m at 293 K) shows strong pinning.
- OSTI ID:
- 5126164
- Journal Information:
- Journal of Applied Physics; (United States), Vol. 70:10; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BORON ALLOYS
COERCIVE FORCE
IRON BASE ALLOYS
NEODYMIUM ALLOYS
ANNEALING
PHASE TRANSFORMATIONS
QUATERNARY COMPOUNDS
STOICHIOMETRY
X-RAY DIFFRACTION
ALLOYS
AMINES
AMMONIUM COMPOUNDS
COHERENT SCATTERING
DIFFRACTION
HEAT TREATMENTS
IRON ALLOYS
ORGANIC COMPOUNDS
RARE EARTH ALLOYS
SCATTERING
360104* - Metals & Alloys- Physical Properties