Formation mechanism of synchronized LPSO structures at elevated temperatures

2015 Fiscal Year Final Research Report

• Project Area: Materials Science of synchronized LPSO structure -Innovative Development of Next-Generation Lightweight Structural Materials-
• Project/Area Number: 23109005
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Kyoto University
• Principal Investigator: Okuda Hiroshi 京都大学, 工学(系)研究科(研究院), 准教授 (50214060)
• Co-Investigator(Kenkyū-buntansha): IIKUBO Satoshi 九州工業大学, 大学院生命体工学研究科, 准教授 (40414594) ; MIURA Seiji 北海道大学, 大学院工学研究科, 教授 (50199949)
• Co-Investigator(Renkei-kenkyūsha): OHTANI Hiroshi 東北大学, 多元物質科学研究所, 教授 (70176923) ; ODE Machiko 物質・材料研究機構, 主任研究員 (50370309) ; TOKUNAGA Tatsuya 九州工業大学, 大学院工学研究科, 准教授 (40457453)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Keywords: LPSO / Mg合金 / 放射光 / 計算状態図 / 実験状態図

Outline of Final Research Achievements

In-situ small- and wide- angle scattering / diffraction method with a use of multicolor X-rays has been successfully developed and applied for the transformation kinetics of Mg85Y9Zn6 ingot.　These in-situ measurements and experimental phase digagram studies revealed that the LPSO structures can be understood as 'phases' and the phase transition process in MgYZn is unique ｉｎ that it was initiated by phase separation under mixing instability, but further driven by structural phase transformations.

Free Research Field

金属材料学　放射光材料評価学