Fabrication of High-Entropy Bulk Metallic Glasses based on Confusion Principle, Clarification of their Properties and their Application

2016 Fiscal Year Final Research Report

• Project/Area Number: 24360284
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: Tohoku University
• Principal Investigator: Takeuchi Akira 東北大学, 金属材料研究所, 特任教授 (40250815)
• Co-Investigator(Kenkyū-buntansha): 網谷 健児 東北大学, 金属材料研究所, 特任准教授 (30463798) ; 湯葢 邦夫 東北大学, 金属材料研究所, 准教授 (00302208) ; 和田 武 東北大学, 金属材料研究所, 助教 (10431602)
• Project Period (FY): 2012-04-01 – 2017-03-31
• Keywords: バルク金属ガラス / アモルファス材料 / 高エントロピー合金 / 等原子分率 / 固溶体 / 合金設計

Outline of Final Research Achievements

The present study has succeeded in fabricating high-entropy bulk metallic glasses (HE-BMGs) as represented by Fe25Co25Ni25(B, Si)25 alloy with a critical diameter of 1.5 mm for forming glassy phase. The alloys were developed by applying a concept of confusion principle that has effectively been utilized for the alloy development of high-entropy (H-E) alloys of multicomponent equi-atomic compositions. Furthermore, a first success in fabricating H-E alloys with hexagonal dense-packed structure was reported by fabricating YGdTbDyLu and GdTbDyTmLu alloys. In the 5-year project, alloy designs of the H-E and relevant alloys have been established based on statistic analysis.

Free Research Field

材料工学