Ce-Rich Misch Metal-Based Bulk Metallic Glasses with High Glass-Forming Ability
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- Li Ran
- Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics
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- Pang Shujie
- Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics
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- Men Hua
- Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics
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- Zhang Tao
- Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics
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Abstract
Ce-rich misch metal (Mm)-based bulk metallic glasses (Mm consists of Ce, La, Pr and Nd) with high glass-forming ability are developed in Mm–Co–Al alloy system. The critical diameter for glass-formation is 10, 5 and 3 mm, and the supercooled liquid region ΔTx (ΔTx=Tx–Tg, Tx is crystallization temperature and Tg is glass transition temperature) are 27, 90 and 79 K for Mm65Co25Al10 (Mm65), Mm60Co20Al20 (Mm60) and Mm55Co25Al20 (Mm55) alloys, respectively. Reduced glass transition temperature Trg (Trg=Tg⁄Tm, where Tm is melting temperature) is 0.62, 0.65 and 0.69 for Mm65, Mm60 and Mm55, respectively. The employment of the misch metal, which comprises multi-rare earth elements, instead of pure Ce in the Ce–Al–Co system can improve the glass-forming ability in spite of the tiny atomic size difference of the rare earth metals. The present alloy system is an exception to the criteria of ΔTx, Tg⁄Tm and different atomic size distribution as well as negative heat of mixing used for evaluating the relative GFA.
Journal
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 46 (10), 2291-2294, 2005
The Japan Institute of Metals and Materials
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Details 詳細情報について
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- CRID
- 1390282679227547648
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- NII Article ID
- 130004452626
- 10018277962
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- NII Book ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL BIB ID
- 7488063
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed