Development of synchronized long-period stacking order structure through non- equilibrium processing

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: 23109007
• 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: Kumamoto University
• Principal Investigator: Kawamura Yoshihito 熊本大学, 先進マグネシウム国際研究センター, 教授 (30250814)
• Co-Investigator(Kenkyū-buntansha): YAMASAKI Michiaki 熊本大学, 先進マグネシウム国際研究センター, 准教授 (50343885) ; MATSUSHITA Masafumi 愛媛大学, 理工学研究科, 講師 (90432799)
• Co-Investigator(Renkei-kenkyūsha): YAMADA Ikuya 大阪府立大学, ナノ科学材料研究センター, 講師 (30378880) ; ITOI Takaomi 千葉大学, 工学(系)研究科(研究院), 准教授 (50333670)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Keywords: 長周期積層構造 / マグネシウム / 急速凝固 / 高圧合成

Outline of Final Research Achievements

Synchronized long-period stacking order (LPSO) structure in Mg alloys has attracted our attention because of their unique synchronized stacking/chemical ordered structure. In this study, we have developed several new synchronized LPSO structure alloys through conventional casting processes, rapid solidification processes, and high pressure synthesis methods. obtained results are as follows: (1) Order-disorder typed LPSO structures were discovered in Mg-Al-Gd alloy system. (2) New synchronized LPSO structures were observed in a rapidly solidified Mg-Co-Sm alloy, (3) New long-period stacking superlattice structure was discovered in a Mg-Zn-Yb alloy processed by high-pressure and high-temperature treatment.

Free Research Field

材料工学