TY - JOUR
T1 - New nanocrystalline high-remanence Nd-Fe-B alloys by rapid solidification
AU - Manaf, A.
AU - Buckley, R. A.
AU - Davies, H. A.
N1 - Funding Information:
The financial support of the Science and Engineering Research Council is gratefully acknowledged. The authors have also benefited from participation in the Concerted European Action on Magnets sponsored by the European Community.
PY - 1993/12
Y1 - 1993/12
N2 - A new type of permanent magnet alloy based on Nd-Fe-B, containing 8-9 at% Nd and processed by melt spinning, is described. Remanences of greater than 1 T are obtained in isotropic ribbon samples, with energy products, (BH)max in excess of 160 kJ m-3 and intrinsic coercivity up to about 485 kA m-1. Microstructurally, the alloys consist of two phase, a matrix of magnetically hard Nd2Fe14B with numerous particles of α-iron on grain boundaries. Both the mean grain size of the Nd2Fe14B ( < 30 nm) and the mean particle size of the α-iron ( < 10 nm) are ultra fine. The second quadrant of the J-H loop is typical of a single-phase, magnetically hard material. The relationship between magnetic properties and microstructure in these nanocrystalline two-phase alloys is discussed.
AB - A new type of permanent magnet alloy based on Nd-Fe-B, containing 8-9 at% Nd and processed by melt spinning, is described. Remanences of greater than 1 T are obtained in isotropic ribbon samples, with energy products, (BH)max in excess of 160 kJ m-3 and intrinsic coercivity up to about 485 kA m-1. Microstructurally, the alloys consist of two phase, a matrix of magnetically hard Nd2Fe14B with numerous particles of α-iron on grain boundaries. Both the mean grain size of the Nd2Fe14B ( < 30 nm) and the mean particle size of the α-iron ( < 10 nm) are ultra fine. The second quadrant of the J-H loop is typical of a single-phase, magnetically hard material. The relationship between magnetic properties and microstructure in these nanocrystalline two-phase alloys is discussed.
UR - http://www.scopus.com/inward/record.url?scp=0027850735&partnerID=8YFLogxK
U2 - 10.1016/0304-8853(93)90475-H
DO - 10.1016/0304-8853(93)90475-H
M3 - Article
AN - SCOPUS:0027850735
SN - 0304-8853
VL - 128
SP - 302
EP - 306
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - 3
ER -