Formation and Functional Properties of Fe-Based Bulk Glassy Alloys
Formation and Functional Properties of Fe-Based Bulk Glassy Alloys
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DOI：
10.2320/matertrans.42.970
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发表时间：
2001-06
影响因子：
1.2
通讯作者：
A. Inoue;A. Takeuchi;B. Shen
中科院分区：
文献类型：
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作者：
A. Inoue;A. Takeuchi;B. Shen
自1995年以来的五年中，铁磁大块玻璃合金在各种合金体系中通过铜模铸造工艺合成。它们的典型合金系统被分为五组，即，(1)Fe-（Al，Ga）-（P，C，B）和Fe-Ga-（P，C，B），（2）（Nd，Pr）-Fe-（Al，Si），（3）Fe-（Zr，Hf，Nb）-B，（4）Fe-Co-Ln-B，和（5）Fe-（Cr，Mo）-B-C。Fe基非晶合金在晶化前存在一个超过50 K的大的过冷液相区，最大值可达100 K左右。在属于组（1）至（5）的合金系统中，玻璃形成的最大样品厚度分别为约3 mm、12 mm、6 mm、1 mm和3 mm。这些块体玻璃合金表现出良好的软磁性能，最大饱和磁化强度为1.3 T，低矫顽力低于5 A/m，除了硬磁性能仅为Nd或Pr基合金。此外，利用粘流现象的固结技术应用于Fe-（Al，Ga）-（P，C，B）合金，形成了具有较好软磁性能的致密块体非晶合金，饱和磁化强度为1.2T，矫顽力为10 A/m，最大磁导率为9000，铁损为50 Hz时的0.11 W/kg。具有良好的磁性能、高的玻璃形成能力和良好的可加工性的块体相结合，有望成为一种新型的磁性材料。
Ferromagnetic bulk glassy alloys were synthesized in a variety of alloy systems by the copper mold casting process for the last five years after 1995. Their typical alloy systems are classified into five groups, i.e., (1) Fe-(Al, Ga)-(P, C, B) and Fe-Ga-(P, C, B), (2) (Nd, Pr)-Fe-(Al, Si), (3) Fe-(Zr,Hf,Nb)-B, (4) Fe-Co-Ln-B, and (5) Fe-(Cr, Mo)-B-C. The Fe-based glassy alloys exhibit a large supercooled liquid region exceeding 50 K before crystallization and the largest value reaches approximately 100 K. The maximum sample thickness of glass formation in the alloy systems belonging to the groups (1) to (5) is about 3 mm, 12 mm, 6 mm, 1 mm and 3 mm, respectively. These bulk glassy alloys exhibit good soft magnetic properties with a maximum saturation magnetization of 1.3 T and low coercive forces below 5 A/m except for hard magnetic properties only for the Nd- or Pr-based alloys. In addition, the application of the consolidation technique using the viscous flow phenomenon to the Fe-(Al, Ga)-(P,C, B) alloys caused the formation of fully dense bulk glassy alloys with rather good soft magnetic properties, e.g., 1.2T for saturation magnetization, 10 A/m for coercive force, 9000 for maximum permeability and 0.1 1 W/kg at 50 Hz for core loss. The combination of good magnetic properties, high glass-forming ability and good workability into a bulk form is promising the future development as a new type of magnetic material.