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)

Journal Article · Fri Nov 15 04:00:00 EST 1991 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.349948· OSTI ID:5126164

Lin, C H; Chu, T Y; Chang, W C; Wu, C D ^[1]; Huang, S H; Chin, T S ^[2]

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1. Materials Research Laboratory, ITRI, Chutung, 310 Taiwan (Republic of China)
2. 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), Journal Name: Journal of Applied Physics; (United States) Vol. 70:10; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
AMINES
AMMONIUM COMPOUNDS
ANNEALING
BORON ALLOYS
COERCIVE FORCE
COHERENT SCATTERING
DIFFRACTION
HEAT TREATMENTS
IRON ALLOYS
IRON BASE ALLOYS
NEODYMIUM ALLOYS
ORGANIC COMPOUNDS
PHASE TRANSFORMATIONS
QUATERNARY COMPOUNDS
RARE EARTH ALLOYS
SCATTERING
STOICHIOMETRY
X-RAY DIFFRACTION