TY - JOUR
T1 - Structure and magnetic properties of melt-spun Fe-Pt-B alloys with high B concentrations
AU - Zhang, Wei
AU - Ma, Dianguo
AU - Li, Yanhui
AU - Yubuta, Kunio
AU - Liang, Xiaoyu
AU - Peng, Dongliang
N1 - Funding Information:
This research was supported by the Natural Science Foundation of China (Grant Nos. 51171034 and 51271043 ), the Fundamental Research Funds for the Central Universities of China (Grant No. DUT11RC(3)29 ).
Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.
PY - 2015/1/15
Y1 - 2015/1/15
N2 - The phase evolution, thermal stability, structure and magnetic properties of the melt-spun Fe70-xPtxB30 (x = 0-20) alloys have been investigated. Addition of small amounts of Pt to the Fe70B30 alloy increases the amorphous-forming ability, leading to the formation of an amorphous phase in the alloys with x = 5 and 10. Further increase in Pt content results in the formation of the fcc-FePt + Fe2B or fcc-FePt + L10-FePt + Fe2B crystalline phases. After appropriate annealing, the homogeneous nano-sized structure consisting of hard L10-FePt and soft Fe2B magnetic phases were formed for the alloys with x = 10-20, which exhibited good hard magnetic properties. As the Pt content increase, the coercivity (iHc) of the L10-FePt/Fe2B nanocomposite alloys significantly increased, while the remanence (Br) decreased. The Br, reduced remanence (Mr/Ms), iHc, and energy product (BH)max of the alloys are in the range of 0.81-1.20 T, 0.76-0.84, 173.2-523.1 kA/m, and 64.0-88.3 kJ/m3, respectively.
AB - The phase evolution, thermal stability, structure and magnetic properties of the melt-spun Fe70-xPtxB30 (x = 0-20) alloys have been investigated. Addition of small amounts of Pt to the Fe70B30 alloy increases the amorphous-forming ability, leading to the formation of an amorphous phase in the alloys with x = 5 and 10. Further increase in Pt content results in the formation of the fcc-FePt + Fe2B or fcc-FePt + L10-FePt + Fe2B crystalline phases. After appropriate annealing, the homogeneous nano-sized structure consisting of hard L10-FePt and soft Fe2B magnetic phases were formed for the alloys with x = 10-20, which exhibited good hard magnetic properties. As the Pt content increase, the coercivity (iHc) of the L10-FePt/Fe2B nanocomposite alloys significantly increased, while the remanence (Br) decreased. The Br, reduced remanence (Mr/Ms), iHc, and energy product (BH)max of the alloys are in the range of 0.81-1.20 T, 0.76-0.84, 173.2-523.1 kA/m, and 64.0-88.3 kJ/m3, respectively.
KW - Amorphous-forming ability
KW - Annealing
KW - Hard magnetic materials
KW - Melt spinning
KW - Nanocomposite structure
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U2 - 10.1016/j.jallcom.2013.12.005
DO - 10.1016/j.jallcom.2013.12.005
M3 - Article
AN - SCOPUS:84907509156
SN - 0925-8388
VL - 615
SP - S252-S255
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - S1
ER -