The effect of Nb addition on the thermal stability and magnetic properties of Fe-based amorphous alloys with a wide supercooled liquid region

• 来源期刊: 中国物理（英文版）
• 学科: 物理学
• 关键词: supercooled liquid region ferromagnetism amorphous alloy
• 年，卷（期）: 2002,（1）
• 页码范围: 77-82
• 页数: 6页
• 分类号: O4
• 语种: 英文

摘要

We have examined the effect of Nb addition on the thermal stability of the supercooled liquid before crystal-lization, the glass-forming ability and magnetic properties for the amorphous alloy series Fe73NbxAl5-xGe2P10C6B4and Fe63Co7NbxZr10-xB20. The supercooled liquid regions (△Tx=Tx-Tg) have maximum values of 66 and 79K,respectively, for Fe73Nb1Al4Ge2P10C6B4 and Fe63Co7Nb4Zr6B20 alloys. The saturation magnetization σs of theFe73NbxAl5-xGe2P10C6B4 alloy system is much higher than that of the Fe63Co7NbxZr10-xB20 alloy system, andis almost unchanged with an increasing Nb content from 0 to 3 at%But the σs of the Fe63Co7NbxZr10-xB20 alloysdecreases linearly with increasing Nb content. The coercive force Hc of the two alloy series can have a minimum value of31A/m for Fe73Nb1Al4Ge2P10C6B4 and 37A/m for Fe63Co7Nb4Zr6B20. All these values are for the ribbons annealedat 773 and 873K for 15min in vacuum.