Fabrication of Fe- and Co-based metallic glasses and their high functional properties

铁基和钴基金属玻璃的制备及其高功能性能

基本信息

批准号：
10305049
负责人：
INOUE Akihisa
金额：
$ 24.58万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10305049/
关键词：
metallic glass iron base alloy cobalt base alloy supercooled liquid region soft magnetic properties 過冷却液体パルク金属ガラス鉄基金属ガラスコバルト基金属ガラス機械的性質

项目摘要

In this fiscal year Fe-base metallic glasses with the large supercooled liquid region before crystallization reaching 100K were found. The maximum diameter of the metallic glasses reaches as large as 5 mm. In addition, large supercooled liquid region of maximum 88 K was found in Co-base metallic glasses. This enable us to fabricate bulk shape specimens with a maximum thickness of 5 mm. Furthermore, rodshaped metallic glasses were prepared with a flux treatment for the Fe-based multicomponent metallic glasses. This preparation method enable us to prepare bulk metallic glasses with maximum thickness of 4 mm even in a low cooling rate. The flux treatment method is effective for decreasing coercivity and increasing supercooled liquid region by 30 %. The glass-forming ability, the stability of supercooled liquid region and the soft magnetic properties increase effectively applying the flux method, by which molten alloy is cleaned, for Fe-based metallic glasses in addition to Pd-based metall … More ic glasses. Based on the findings, ring-shaped bulk metallic glasses with good soft magnetic properties were prepared. Basis research for application is under promoting. The deformed Fe- and Co based metallic glasses, utilizing viscous flow deformation in the supercooled liquid region before crystallization, shows as good soft magnetic properties as metallic glasses prepared by low cooling rate. Bulk metallic glasses were succeeded in preparing by powder consolidation undegrading soft magnetic properties, The consolidation method is found to be appropriate for the fabrication of bulk metallic glasses. Fe based metallic glasses containing lanthanide metals as small as 3 to 4 atomic percent shows supercooled liquid region of 50 K.The small addition increase the glass-forming ability, resulted in fabricating bulk shaped metallic glasses with a several millimeters thickness. Furthermore, metallic glasses subjected appropriate annealing are found to have mixture structure of remaingn metallic glasse with nanometer sized crystalline phase and have good hard magnetic These results attracts attention as a new process to make new permanent magnet bulk materials. Less

在这个财政年度，在结晶到100K之前，在结晶到100K之前具有大型超冷的液体区域。金属眼镜的最大直径达到5毫米。此外，在共同基准金属玻璃中发现了最大88 K的大型超冷液体区域。这使我们能够制造最大厚度为5毫米的散装样品。此外，通过用于Fe基的多组分金属玻璃的通量处理制备棒状金属玻璃。这种制备方法使我们能够制备散装金属玻璃，即使在低冷却速率下，最大厚度为4 mm。通量处理方法可有效地降低矫顽力和将超冷液体区域降低30％。玻璃形成能力，超冷液体区域的稳定性和软磁性能有效地采用了通量方法（通过该方法清洁熔融合金），除了基于PD的金属化之外，还可以使用基于Fe的金属玻璃杯……更多IC玻璃。根据发现，制备了具有良好软磁性特性的环形散装金属玻璃。应用程序的基础研究正在促进。结晶前使用粘性流动液体中的粘性流动变形，基于Fe-和CO的金属玻璃显示出与低冷却速率制备的金属玻璃一样良好的软磁性。散装金属眼镜通过粉末巩固不良磁性特性进行准备，发现合并方法适合制造散装金属玻璃。 Fe基的金属玻璃含有小至3至4个原子百分比的灯笼金属的金属玻璃显示出50 K的超冷液体区域。小添加增加了玻璃形成能力，导致制造散装的金属玻璃杯，厚度为几毫米。此外，发现经过适当退火的金属玻璃具有剩余金属玻璃与纳米尺寸的晶体相的混合结构，并具有良好的硬磁性吸引人的注意力，作为制造新的永久性磁铁大块材料的新过程。较少的