The effect of Nb addition on the thermal stability and magnetic properties of Fe-based amorphous alloys with a wide supercooled liquid region
Rong Chuan-Bing (荣传兵)ab, Zhao Yu-Hua (赵玉华)b, Cheng Li-Zhi (程力智)b, Xu Min (徐民)c, He Kai-Yuan (何开元)b, Zhao Heng-He (赵恒和)b
a State Key Laboratory of Magnetism, Institute of Physics & Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China; b Department of Functional Materials, Institute of Material and Metallurgy, Northeastern University, Shenyang110004, China; c State Key Laboratory of Rapidly Solidified Nonequilibrium Alloys, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
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 $\sigma_{\rm s}$ 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 $\sigma_{\rm s}$ 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.
Received: 18 June 2001
Revised: 30 August 2001
Accepted manuscript online:
PACS:
75.50.Kj
(Amorphous and quasicrystalline magnetic materials)
(Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization)
Cite this article:
Rong Chuan-Bing (荣传兵), Zhao Yu-Hua (赵玉华), Cheng Li-Zhi (程力智), Xu Min (徐民), He Kai-Yuan (何开元), Zhao Heng-He (赵恒和) The effect of Nb addition on the thermal stability and magnetic properties of Fe-based amorphous alloys with a wide supercooled liquid region 2002 Chinese Physics 11 77
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