2011 Fiscal Year Final Research Report
New Functional Co-base Alloys-Phase stability and Its Industrial Applications
| Project/Area Number |
19106012
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| Research Category |
Grant-in-Aid for Scientific Research (S)
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| Allocation Type | Single-year Grants |
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| Research Field |
Structural/Functional materials
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| Research Institution | Tohoku University |
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Principal Investigator |
ISHIDA Kiyohito 東北大学, 大学院・工学研究科, 名誉教授 (20151368)
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| Co-Investigator(Kenkyū-buntansha) |
OHNUMA Ikuo 東北大学, 大学院・工学研究科, 准教授 (20250714)
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| Co-Investigator(Renkei-kenkyūsha) |
KAINUMA Ryosuke 東北大学, 大学院・工学研究科, 教授 (20202004)
OIKAWA Katsunari 東北大学, 大学院・工学研究科, 准教授 (70356608)
YAMAUCHI Kiyoshi 東北大学, 大学院・工学研究科, 教育研究支援者 (70375202)
SUTOU Yuji 東北大学, 大学院・工学研究科, 准教授 (80375196)
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| Project Period (FY) |
2007 – 2011
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| Keywords | 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 |
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| Research Abstract |
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.
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[Remarks] 新聞発表:○「硬い金属溶かさず接合日立・東北大が器具摩擦熱で柔らかく」(平成22年3月31日:日経産業新聞)
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[Remarks] ○「高融点材も接合可能摩擦攪拌ツールを開発」(平成22年3月29日:電気新聞)
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[Remarks] ○「融点高い金属を接合東北大と日立FSWツール開発」(平成22年3月29日:日刊工業新聞
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