Growth of shingle crystals of Fe-rare earth intermetallic giant magnetrostrictive compounds and its industrialization

铁-稀土金属间超磁致伸缩化合物叠片晶体的生长及其产业化

• 批准号: 02555150
• 负责人: SAKA Hiroyasu
• 金额: $ 4.74万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02555150/
• 关键词: Giant magnertrosticitive alloy; Rare earth; Laves phase; Single crystals; 塑性変形

Recently intermetallic compounds of Fe and rare-earth elements with Laves structure which show very large magnetostrictions were found, and have gathered much attention. The magnetostrictions of these compounds are larger than that of ordinary magnetostriction alloys by two or three order of magnitude. However, their magnetostrictions show large anisotropy. Thus, in order to make full use of the large magnetostrictions, it is necessary to grow single crystals.In this project. it was attempted to grow single crystals of Fe-(Tb,Dy) intermetallic compound by various Bridgman methods. Although Tb and Dy are oxidized very easily, single crystals with high quality were grown by Bridgman method at a rather high growth speed.I was also attempted to grow single crystal by recrystallization technique. However, severe oxidation took place during annealing even under an purified argon atmosphere. Thus, it was concluded that Bridgman technique is the most useful and convenient method to grow single crystals of Fe-(Tb,Dy) compounds in an industrial scale.

近年来，人们发现了具有Laves结构的Fe与稀土元素的金属间化合物，其表现出极大的磁致伸缩性，并引起了人们的广泛关注。这些化合物的磁致伸缩比普通磁致伸缩合金大两个或三个数量级。然而，它们的磁致伸缩表现出很大的各向异性。因此，为了充分利用大磁致伸缩，有必要生长单晶。在本项目中。尝试通过各种布里奇曼方法生长Fe-(Tb,Dy)金属间化合物单晶。尽管Tb和Dy很容易被氧化，但通过布里奇曼法以相当高的生长速度生长出高质量的单晶。我也尝试过通过再结晶技术来生长单晶。然而，即使在纯化的氩气氛下，退火过程中也会发生严重的氧化。因此，得出的结论是，布里奇曼技术是工业规模生长 Fe-(Tb,Dy) 化合物单晶的最有用和最方便的方法。

项目成果

H.Saka, T.Hayakawa, M.Nakamura, H.Mizutani and E.Nakamura: "Plasticity of single crystals of Fe_2 (Dy, Tb) Laves phase at high temperatures" Phul.Mag.A.

H.Saka、T.Hayakawa、M.Nakamura、H.Mizutani 和 E.Nakamura：“高温下 Fe_2 (Dy, Tb) Laves 相单晶的塑性” Phul.Mag.A。

H,SAKA,H.HAYAKAWA M,NAKAMURA,H.MIZUTANI,E.NAKAMURA: "Plasticity of single crystals of Fe2 (Dy,Tb) Laves phase at high temperatures" Philosophical Magazine,A. (1993)

H,SAKA,H.HAYAKAWA M,NAKAMURA,H.MIZUTANI,E.NAKAMURA：“高温下 Fe2 (Dy,Tb) Laves 相单晶的塑性”哲学杂志，A。

H.Saka,T.Hayakawa, M.Nakamura,H.Mizutani and E.Nakamura: "Plasticity of Fe_2(DY,Tb)magnetrostrictive Compound and its dislocation stvucture." Phys.Stat.Soli(a).

H.Saka、T.Hayakawa、M.Nakamura、H.Mizutani 和 E.Nakamura：“Fe_2(DY,Tb)磁致伸缩化合物的塑性及其位错结构”。

H.Saka,T.Hayakawa,K.Maruyama,M.Nakamura,H.Mizutani and E.Nakamura: "Plasticity of Fe_2(Dy,Tb)magnetrostrictive Compound at high temperatuve" Proc of International Symposium on Iatermetallic Compounds-Structuve and Mechanical Propevties. 651-654 (1991)

H.Saka,T.Hayakawa,K.Maruyama,M.Nakamura,H.Mizutani和E.Nakamura:“高温下Fe_2(Dy,Tb)磁致伸缩化合物的塑性”国际异金属化合物结构与力学研讨会论文集

H.Saka, T.Hayakawa, K.Maruyama, M.Nakamura, H.Mizutani and E.Nakamura: "Plasticity of Fe_2 (Dy, Tb) magnetrostrictive compound at high temperature" Intermetallic Compounds, Proceeding on International Symposium on Intermetallic Compounds.651-654 (1991)

H.Saka、T.Hayakawa、K.Maruyama、M.Nakamura、H.Mizutani 和 E.Nakamura：“高温下 Fe_2 (Dy, Tb) 磁致伸缩化合物的塑性”金属间化合物，国际金属间化合物研讨会论文集。