The effect of Ti and C on the phase evolution and magnetic properties of Pr{sub 9}Fe{sub bal}Ti{sub x}B{sub 11-y}C{sub y} (x=0-4, y=0-11) nanocomposites
- Department of Physics, National Chung Cheng University, Taiwan 621 (China)
Phase evolution, microstructure, and magnetic properties of melt-spun Pr{sub 9}Fe{sub bal}Ti{sub x}B{sub 11-y}C{sub y} (x=0, 2.5, and 4, y=0-11) ribbons have been investigated. For Pr{sub 9}Fe{sub bal}Ti{sub x}B{sub 11-y}C{sub y} series ribbons, addition of Ti suppresses the formation of metastable Pr{sub 2}Fe{sub 23}B{sub 3} phase and ensures the existence of a large amount of magnetically hard Pr{sub 2}Fe{sub 14}B phase in the ribbons. However, the increase of C substitution in the Pr{sub 9}Fe{sub bal}Ti{sub 2.5}B{sub 11-y}C{sub y} (y=0-5.5) ribbons diminishes the B{sub r}, {sub i}H{sub c}, and (BH){sub max} monotonically, which comes from the increase of volume fraction of Pr{sub 2}Fe{sub 17}C{sub z} and {alpha}-Fe phases and the rapid decrease of the 2:14:1 phase. Only in the higher Ti content Pr{sub 9}Fe{sub bal}Ti{sub 4}B{sub 11-y}C{sub y} ribbons, a slight C addition cannot only form the Pr{sub 2}Fe{sub 14}(B,C) phase but also refine the grain size, giving rise to the improvement of magnetic properties. The optimal properties of B{sub r}=9.4 kG, {sub i}H{sub c}=11.1 kOe, (BH){sub max}=18.0 MGOe, {alpha}=-0.207%/ deg. C, and {beta}=-0.612%/ deg. C are achieved in Pr{sub 9}Fe{sub bal}Ti{sub 4}B{sub 10.5}C{sub 0.5} nanocomposites.
- OSTI ID:
- 20788106
- Journal Information:
- Journal of Applied Physics, Vol. 99, Issue 8; Other Information: DOI: 10.1063/1.2172573; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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