2009 Fiscal Year Final Research Report
Synthesis of large-size nanocrystal-toughened Cu-based bulk metallic glasses with excellent plasticity by controlling solidification
| Project/Area Number |
19560689
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Composite materials/Physical properties
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| Research Institution | Tohoku University |
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Principal Investigator |
ZHANG Wei Tohoku University, 金属材料研究所, 准教授 (20400400)
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| Co-Investigator(Kenkyū-buntansha) |
YUBUTA Kunio 東北大学, 金属材料研究所, 助教 (00302208)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 複合延性 / 金属ガラス |
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| Research Abstract |
1) Glass-forming ability of Cu-Zr-Al-Ag alloys was significantly enhanced by the composition optimum. The Ta particles (40μm) homogenously distributed the Cu-Zr-Al-Ag bulk glassy alloys with diameters of 2-5mm were synthesized. The composites showed high strength and unusual plasticity. Ta particles seed the initiation of multiple shear bands and block the shear band propagation, leading to a net-like homogeneous distribution of the shear bands.
2) The large-size Zr-Cu-Al-Fe bulk glassy alloys containing nanocrystals with size of 5-10nm were obtained by copper mold casting. The composites exhibited a combination of high yield strength and large plasticity. The mechanism for the large plasticity of the new bulk glassy composites is elucidated.
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Research Products
(23 results)
