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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

本年度发现了在结晶前具有100 K的大过冷液相区的Fe基金属玻璃，最大直径达到5 mm。此外，在Co基金属玻璃中发现了最大88 K的大过冷液相区。这使我们能够制造块状试样的最大厚度为5毫米。此外，棒状金属玻璃制备与熔剂处理的铁基多元金属玻璃。这种制备方法使我们能够在低冷却速率下制备最大厚度为4 mm的大块金属玻璃。熔剂处理方法可有效降低过冷度，使过冷液相区增加30%。对Fe基金属玻璃和Pd基金属玻璃采用助熔剂法净化合金液，有效地提高了非晶形成能力、过冷液相区稳定性和软磁性能。 ...更多信息 IC眼镜在此基础上，制备了具有良好软磁性能的环形大块非晶合金。应用基础研究正在推进。在晶化前的过冷液相区利用粘滞流动变形的Fe基和Co基非晶合金，显示出与低冷速制备的非晶合金一样好的软磁性能。采用粉末固结法成功地制备了软磁性能不下降的大块非晶合金，证明粉末固结法是制备大块非晶合金的一种合适的方法。铁基金属玻璃中镧系元素的原子含量为3 ~ 4%时，其过冷液相区为50 K。少量的镧系元素的加入提高了玻璃的形成能力，形成了厚度为几毫米的块状金属玻璃。此外，还发现经过适当退火处理的金属玻璃具有剩余金属玻璃与纳米晶相的混合结构，并具有良好的硬磁性能。这一结果作为制备新型永磁块体材料的一种新工艺，引起了人们的关注。少