New Functional Co-base Alloys-Phase stability and Its Industrial Applications

新型功能钴基合金-相稳定性及其工业应用

• 批准号: 19106012
• 负责人: ISHIDA Kiyohito
• 金额: $ 70.72万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (S)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19106012/
• 关键词: 新機能材料; 状態図; 熱力学データベース; 耐熱合金; 磁気記録媒体; 生体材料; 熱力学データーベース; データベース; 磁気記録材料

Thermodynamic database on Co-base alloys has been constructed based on the experimental determinations and thermodynamic assessments by Calphad (Calculation of Phase Diagrams)approach. Using this database, a new type of Co-base superalloys strengthend by the L1_2 compound of γ' Co_3(Al, W)phase has been designed. The developed wrought Co-base superalloy shows the expected creep strength of 100MPa at 800 oC for 10^5 hours, while the cast Co-base superalloy has been applied to the FSW (Friction Stir Welding)tool for practical use. It is shown that the Co-W thin film and Co-based Heusler alloys are attracted for magnetic recording media and spin electronics, respectively. Furthermore, the optimum conditions for compositions and heat treatment to form porous structure on the surface to develop drug eluting stent have been obtained by microstructural control of γ (fcc)/β (B2)lamellar structure of Co-Al-based alloys.

在Calphad（相图计算）方法的实验测定和热力学评估的基础上，建立了钴基合金的热力学数据库，利用该数据库，以γ'Co_3（L1_2化合物）强化了新型钴基高温合金。 Al, W)相已被设计出来，所开发的变形钴基高温合金在 800 oC 下的预期蠕变强度为 10^5。小时，而铸造钴基高温合金已应用于FSW（搅拌摩擦焊）工具并投入实际使用。结果表明，Co-W薄膜和钴基赫斯勒合金在磁记录介质和自旋电子学方面具有吸引力。此外，通过对γ(FCC)/β(B2)层状结构的微观结构控制，获得了在表面形成多孔结构开发药物洗脱支架的最佳成分和热处理条件。钴铝合金。

项目成果

Soft X-ray magnetic circular dichroism of L2_1-type Co_2FeGa Heusler alloy

L2_1型Co_2FeGa Heusler合金的软X射线磁圆二色性

• 发表时间: 2010
• 作者: R. Y. Umetsu; T. Nakamura; K. Kobayashi; R. Kainuma; A. Sakuma; K. Fukamichi;K. Ishida
• 通讯作者: K. Ishida

Electronic specific heat coefficient and magnetic properties of L2_1 phase in Co_2YGa(Y=Cr, Mn and Fe)Heusler alloys

Co_2YGa(Y=Cr、Mn、Fe)Heusler合金中L2_1相的电子比热系数及磁性能

• 发表时间: 2010
• 作者: R. Y. Umetsu; N. Endo; A. Fujita; R. Kainuma; A. Sakuma; K. Fukamichi;K. Ishida
• 通讯作者: K. Ishida

Magnetization Process near the Curie Temperature of a Ferromagnetic Heusler Alloy Co2CrGa

铁磁霍斯勒合金Co2CrGa在居里温度附近的磁化过程

• 发表时间: 2010
• 作者: H. Nishihara; Y. Furutani; T. Wada; T. Kanomata; K. Kobayashi; R. Kainuma; K. Ishida; k. Koyama; K. Watanabe
• 通讯作者: K. Watanabe

Phase Stability of the L1_2 Compound and Microstructural Changes in Co-(W or Mo)-Ta Ternary Alloys

L1_2化合物的相稳定性及Co-(W或Mo)-Ta三元合金的微观结构变化

• 发表时间: 2009
• 作者: H. Chinen; T. Omori; K. Oikawa; I. Ohnuma; R. Kainuma;K. Ishida
• 通讯作者: K. Ishida

Magnetic anisotropy of epitaxially grown Co and its alloy thin films", J. Phys:

外延生长Co及其合金薄膜的磁各向异性”，J. Phys：

• 发表时间: 2009
• 作者: J