TY - JOUR
T1 - Effect of carbon substitution on the magnetic properties of Nd-Fe-(B,C) nanocomposite magnets
AU - Daniil, M.
AU - Okumura, H.
AU - Hadjipanayis, G. C.
AU - Sellmyer, D. J.
N1 - Funding Information:
The work is supported by DOE, under Grant No: FG02-90ER45413. Also, Maria Daniil would like to thank the “Alexandros Onasis” Foundation for the scholarship support.
PY - 2003/12
Y1 - 2003/12
N2 - The purpose of the present work is to study the effect of carbon substitution for boron on the magnetic and structural properties in nanocomposite Nd10Fe82B8-xCx, (x = 0, 2, 4, 5, 6, 7) ribbons in correlation with their crystallization behavior. Four different structural states were observed in as-spun ribbons depending on the carbon content x and the wheel speed: (i) Nd2Fe 14(B,C)+α-Fe, (ii) Nd2Fe14(B,C)+Nd 2Fe17Cx+α-Fe, (iii) Nd2Fe 17Cx+α-Fe and (iv) amorphous. In annealed ribbons, the 2:17:Cx phase transforms into the 2:14:1, whereas the amount of α-Fe phase increases with x. The coercivity has a maximum of 8.7kOe for x=2, followed by a gradual decrease with further increase of carbon concentration. The deterioration of the magnetic properties with x can be associated with the change in the crystallization behavior and the coarsening of the microstructure for x>4.
AB - The purpose of the present work is to study the effect of carbon substitution for boron on the magnetic and structural properties in nanocomposite Nd10Fe82B8-xCx, (x = 0, 2, 4, 5, 6, 7) ribbons in correlation with their crystallization behavior. Four different structural states were observed in as-spun ribbons depending on the carbon content x and the wheel speed: (i) Nd2Fe 14(B,C)+α-Fe, (ii) Nd2Fe14(B,C)+Nd 2Fe17Cx+α-Fe, (iii) Nd2Fe 17Cx+α-Fe and (iv) amorphous. In annealed ribbons, the 2:17:Cx phase transforms into the 2:14:1, whereas the amount of α-Fe phase increases with x. The coercivity has a maximum of 8.7kOe for x=2, followed by a gradual decrease with further increase of carbon concentration. The deterioration of the magnetic properties with x can be associated with the change in the crystallization behavior and the coarsening of the microstructure for x>4.
KW - Melt-spinning
KW - Nanocomposite magnets
KW - NdFeC magnets
KW - Ribbons
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U2 - 10.1016/S0304-8853(03)00399-8
DO - 10.1016/S0304-8853(03)00399-8
M3 - Article
AN - SCOPUS:0242365724
SN - 0304-8853
VL - 267
SP - 316
EP - 324
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - 3
ER -