文档介绍：南京航空航天大学
硕士学位论文
Fe-Si-B-Cu-P非晶纳米晶软磁合金的制备与性能研究
姓名:郭敏
申请学位级别:硕士
专业:材料学
指导教师:王寅岗
2011-03
南京航空航天大学硕士学位论文
摘要
本文采用工业原材料,应用单辊旋淬法和非晶晶化法制备了 FeSiBCuP 系非晶/纳米晶合金。
利用差示扫描量热法并结合 X 射线衍射表征了非晶态软磁合金的非晶形成能力、热稳定性、晶
化过程以及纳米晶合金的结构,此外,还测量了非晶合金和纳米晶合金的磁性能和脆性,系统研
究了合金元素和退火工艺对非晶/纳米晶软磁合金结构和性能的影响,获得了具有高饱和磁化强
度和低矫顽力的软磁合金材料。
研究表明,Fe81SixB16-xCu1P2 合金中 Si 和 B 相对含量的改变对合金结构和非晶形成能力产生
一定的影响,在 Si 含量为 4 at.%,得到完全非晶态的合金,非晶形成能力与其他成分的合金相比
比较高。同时 Nb 元素的加入有助于提高晶化温度,稳定非晶相,而且 Nb 原子对抑制α-Fe(Si)
相纳米晶粒的长大有重要作用。随着退火工艺的改变,非晶态合金晶化后将得到不同结构和性能
的纳米晶合金。一定成分的 Fe 基非晶合金在最佳退火条件下退火后可获得由非晶和纳米晶组成
的复相组织,纳米晶的晶粒尺寸可达到 10nm 左右。处于热力学亚稳态的非晶软磁合金在退火过
程中发生结构重排,导致条带变脆,通过调整热处理工艺可以降低脆性,实现纳米晶合金韧性与
磁性较佳的配合。Fe81Si4B12Cu1P2 非晶合金以的退火速率在 753K 退火 3min 后合金材料具
有优良的综合性能。

关键词:铁基非晶合金,单辊旋淬法,非晶形成能力,纳米晶,软磁性能,韧性
I
Fe-Si-B-Cu-P 非晶纳米晶软磁合金的制备与性能研究

ABSTRACT
In this thesis, a series of FeSiBCuP amorphous and nanocrystalline alloys are prepared by
single-roller melt spinning method and subsequent crystallization using industrial raw materials. With
Differential Scanning Calorimetry and X-ray Diffraction, the glass-forming ability (GFA), thermal
stability, crystallization process and structure are investigated for amorphous and nanocrystalline alloys.
In addition, the ic properties and brittleness of amorphous alloys and nanocrystalline alloys are
studied. The effects position and heat treatment on the microstructure and properties of
amorphous and nanocrystalline soft ic alloys are systematically investigated in order to obtain
excellent ic materials with high Bs and low coercivity.
It is found that the ratio of Si and B in Fe81SixB16-xCu1P2 (x = 2, 4, 8, 12) alloys has an effect on
their structure and GFA. A uniform amorphous Fe81SixB16-xCu1P2 ribbons was obtained at x = 4 with
higher GFA than others. The addition of Nb element is believed to be benefit to raise the crystallization
temperature and to stabilize the amorphous structure. The addition of Nb has a significant effect on
r