The effect of Nb addition on the thermal stability and magnetic properties of Fe-based amorphous alloys with a wide supercooled liquid region |
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Authors: | Rong Chuan-Bing Zhao Yu-Hu Cheng Li-Zhi Xu Min He Kai-Yuan Zhao Heng-He |
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Affiliation: | State Key Laboratory of Magnetism, Institute of Physics & Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China;Department of Functional Materials, Institute of Material and Metallurgy, Northeastern University, Shenyang110004, China; State Key Laboratory of Rapidly Solidified Nonequilibrium Alloys, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China |
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Abstract: | We have examined the effect of Nb addition on the thermal stability of the supercooled liquid before crystallization, the glass-forming ability and magnetic properties for the amorphous alloy series Fe73NbxAl5-xGe2P10C6B4 and Fe63Co7NbxZr10-xB20. The supercooled liquid regions (ΔTx=Tx-Tg) have maximum values of 66 and 79K, respectively, for Fe73Nb1Al4Ge2P10C6B4 and Fe63Co7Nb4Zr6B20 alloys. The saturation magnetization σs of the Fe73NbxAl5-xGe2P10C6B4 alloy system is much higher than that of the Fe63Co7NbxZr10-xB20 alloy system, and is almost unchanged with an increasing Nb content from 0 to 3 at%. But the σs of the Fe63Co7NbxZr10-xB20 alloys decreases linearly with increasing Nb content. The coercive force Hc of the two alloy series can have a minimum value of 31A/m for Fe73Nb1Al4Ge2P10C6B4 and 37A/m for Fe63Co7Nb4Zr6B20. All these values are for the ribbons annealed at 773 and 873K for 15min in vacuum. |
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Keywords: | supercooled liquid region ferromagnetism amorphous alloy |
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