2023 Fiscal Year Final Research Report
FFF Method Additive Manufacturing of TiAl-based alloy, and Analysis of their molding process sintering and phenomena
| Project/Area Number |
21K03792
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 18020:Manufacturing and production engineering-related
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| Research Institution | Tokyo Denki University |
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Principal Investigator |
Toru Shimizu 東京電機大学, 理工学部, 研究員 (60357217)
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| Co-Investigator(Kenkyū-buntansha) |
渡利 久規 東京電機大学, 理工学部, 教授 (90210971)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 粉末冶金 / チタン、チタン合金 / FFF方式積層造形 / AM / 焼結 / 超低酸素分圧 |
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| Outline of Final Research Achievements |
The important development elements in this study were 1) the development of filaments with sufficiently high powder content, 2) the development of an FFF-based AM system capable of molding with the developed filaments, and 3) the development of a low-cost heating, debinding and sintering system capable of sintering titanium-based alloys.
Compact and low-cost lamination molding of titanium and titanium alloys was achieved by using the filaments and molding equipment developed in the previous study and the ultra-low oxygen partial pressure furnace developed in this study. The feasibility of the molding was confirmed through the lamination molding of test specimens from self-made filaments using the molding equipment, debinding and sintering, and strength and quality is evaluated. However, the implementation of intermetallic compound titanium alloys (TiAl, NiTi, etc.) was not possible due to difficulties in obtaining their powders.
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| Free Research Field |
素形材加工、粉末冶金
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| Academic Significance and Societal Importance of the Research Achievements |
学術的意義：低酸素分圧装置、およびマグネシウムフィルターを単独に、あるいは併用することにより、大気圧下、超低酸素分圧環境での還元焼結、特にチタンでの焼結が可能であることを示した。このことは、困難とされたチタン系金属間化合物合金のへの展望を示す。
社会的意義：従来、高コストである金属積層造形装置をコンパクトかつ低コストで実現可能であることを証明した。さらに、チタン系合金でも実施可能であることを明示した。このことにより、多品種少量生産分野、特にバイオマテリアルによるインプラントの造形、あるいは、極限環境おける金属製品製造の可能性を示したことの社会的意義は大きい。
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