2011 Fiscal Year Final Research Report
Clarification of Local Atomic Arrangements of Metallic Glasses by Plastic Crystal Model and Fabrication of New Bulk Metallic Glasses
| Project/Area Number |
21560715
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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 |
Structural/Functional materials
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| Research Institution | Tohoku University |
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Principal Investigator |
TAKEUCHI Akira 東北大学, 原子分子材料科学高等研究機構, 准教授 (40250815)
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| Co-Investigator(Kenkyū-buntansha) |
YOKOYAMA Yoshihiko 東北大学, 金属材料研究所, 准教授 (00261511)
YUBUTA Kunio 東北大学, 金属材料研究所, 准教授 (00302208)
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| Project Period (FY) |
2009 – 2011
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| Keywords | アモルファス材料 / 金属ガラス / 柔粘性結晶 / 分子動力学シミュレーション |
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| Research Abstract |
The present study dealt with molecular dynamics (MD)simulations to analyze the atomic-scale structure of metallic glasses and the development of a new bulk metallic glass (BMG). A MD simulation model by referring to a plastic crystal was performed where the plastic crystal is known as an intermediate phase between a liquid and solid phase in a class of molecular materials. Simulation results revealed that BMGs possess critically-percolated, cluster-packed structure. Furthermore, considerations of the simulation results make it possible to produce a high-entropy bulk metallic glass with a critical diameter of 10 mm in a Pd_20Pt_20Cu_20Ni_20P_20 alloy as a new type of bulk metallic glass.
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