• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Mechanism of LPSO formation from a viewpoint of clusters and its extension to other materials

Research Project

Project/Area Number 16H04492
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Physical properties of metals/Metal-base materials
Research InstitutionKyoto University

Principal Investigator

Hiroshi Okuda  京都大学, 工学研究科, 准教授 (50214060)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥14,950,000 (Direct Cost: ¥11,500,000、Indirect Cost: ¥3,450,000)
Keywords長周期積層規則構造 / マグネシウム合金 / 階層的相転移 / 放射光小角散乱 / XAFS / LPSO合金 / 放射光小中角散乱 / MgYZn 合金 / 長周期積層秩序構造 / 放射光散乱 / ブロック共重合体 / 階層的相転移材料 / LPSO構造 / Mg合金 / アモルファス / 小角高角同時その場測定法 / Mg合金 / 相転移 / SWXS / 放射光 / LPSO / MgYZn / EXAFS / クラスターダイナミクス
Outline of Final Research Achievements

Formation mechanism of long-period stacking ordered (LPSO) structures has been examined by in-situ synchrotron radiation small- and wide scattering experiment and XAFS measurements. Samples examined were Mg-RE-TM alloy ribbons rapidly quenched to form amorphous samples, with RE=Y and Gd , TM=Zn and Cu. It has been found out that replacement of Y by Gd shows similar transformation paths, with similar crystallization temperature and formation temperatures of LPSO. However, MgGdZn system with the same composition, i.e., Mg85RE9Zn6, results in LPSO phase with different periodicity of 14H than that of 18R for Y. Further, although the transition temperature to form LPSO is almost the same for the two alloys, the growth of clusters is much faster in GdZn alloys, and matured to the L12 cluster size much faster. This suggests that the structural transformation is not driven by the saturated size of L12 clusters.

Academic Significance and Societal Importance of the Research Achievements

材料を製造する場合、その形成過程を理解することは組織や特性の制御をおこなう観点から重要である。複雑な構造をもつ金属材料は多くの場合急速凝固などの非平衡性により、原子位置が不完全な材料ができるに過ぎない。ところが複雑な構造を持つLPSO構造は単位構造としてのL12クラスターと呼ばれる構造単位は比較的ロバストであり、その分布に任意性を残すという風変わりな特性を持つことが明らかになり、このような振舞いをする材料の特徴や条件を明らかにすることは新規材料開発に新たな視点をもたらすことが期待される。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (20 results)

All 2019 2018 2017 2016

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (15 results) (of which Int'l Joint Research: 6 results,  Invited: 4 results)

  • [Journal Article] 放射光によるMg基LPSO合金の相変態過程の研究2019

    • Author(s)
      奥田浩司
    • Journal Title

      軽金属

      Volume: 69 Pages: 211-216

    • NAID

      130007684573

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Transition to long period stacking ordered structures in Mg 85 Gd 9 Zn 6 alloys from amorphous ribbons examined by synchrotron radiation scattering: Comparison with Mg 85 Y 9 Zn 6 alloys2017

    • Author(s)
      Okuda Hiroshi、Yamasaki Michiaki、Kawamura Yoshihito
    • Journal Title

      Scripta Materialia

      Volume: 139 Pages: 26-29

    • DOI

      10.1016/j.scriptamat.2017.06.013

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] GISAXSによる表面近傍の構造変化の検討2017

    • Author(s)
      奥田浩司
    • Journal Title

      表面科学

      Volume: 18 Pages: 548-552

    • NAID

      130006218945

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of microstructures in rapidly-quenched Mg85Y9Zn6 alloy ribbons during heating at a constant speed examined by simultaneous small- and wide angle scattering measurements2016

    • Author(s)
      H. Okuda
    • Journal Title

      Acta Materialia

      Volume: 118 Pages: 95-99

    • DOI

      10.1016/j.actamat.2016.06.028

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Realization of two-dimensional anomalous small-angle scattering of Al alloys at theKabsorption edge of Al2016

    • Author(s)
      Okuda Hiroshi、Sakohata Rei、Kitajima Yoshinori、Tamenori Yusuke
    • Journal Title

      Journal of Applied Crystallography

      Volume: 49 Issue: 5 Pages: 1803-1805

    • DOI

      10.1107/s1600576716010669

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Presentation] LPSO構造形成過程におけるクラスター局所構造変化2019

    • Author(s)
      近都康平, 伊藤樹人、杉野智裕、奥田浩司、田渕雅夫、君塚肇、山崎倫昭、河村能人
    • Organizer
      放射光学会年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] tender 領域でのGISAXS 計測とブロック共重合体薄膜の深さ分解測定の試み2019

    • Author(s)
      奥田浩司,櫻井伸一,五十嵐教之,為則雄祐,北島義典
    • Organizer
      放射光学会年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] MgYZn合金LPSO中のクラスター構造の解析2018

    • Author(s)
      1.伊藤樹人,近都康平,○奥田浩司,黒川修,山崎倫昭,河村能人
    • Organizer
      軽金属学会春季講演大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Local structure analysis of clusters in Mg-Zn-Y alloys with long period stacking ordered structure2018

    • Author(s)
      2.K.Kintsu, M.Ito, H.Okuda, M.Tabuchi, H.Kimizuka, M.Yamasaki, Y.Kawamura
    • Organizer
      XAFS2018,
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Mg85Y9Zn6及びその周辺組成における平均周期クラスター集積組織の解析2018

    • Author(s)
      奥田浩司,田中浩登,近都康平,伊藤樹人,山崎倫昭,河村能人
    • Organizer
      金属学会秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Hierarchical transformation path of LPSO formation as described by cluster motion in MgYZn alloy systems examined by SR-SWAXS2018

    • Author(s)
      Hiroshi Okuda,Hiroto Tanaka, Kohei Kintsu, Michiaki Yamasaki and Yoshihito Kawamura
    • Organizer
      Thermec2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Formation and stability of average/long- period stacking ordered structures during heating amorphous Mg-Y-TM ribbons: SR-SWAXS results2018

    • Author(s)
      Hiroshi Okuda, Hiroto Tanaka, Kohei Kintsu, Mikito Ito, Hajime Kimizuka, Noriyuki Igarashi, Shigeru Kimura Michiaki Yamasaki and Yoshihito Kawamura
    • Organizer
      LPSO2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Mg85Y9Zn6周辺組成におけるhcp-LPSO分岐領域のSWAXS解析2018

    • Author(s)
      奥田浩司、田中浩登、山崎倫昭、河村能人
    • Organizer
      日本金属学会春季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] EXAFSによるMgYZn-LPSO合金のクラスター局所構造解析2018

    • Author(s)
      近都康平、杉野智弘、奥田浩司、田渕雅夫、君塚肇、山崎倫昭、河村能人
    • Organizer
      日本金属学会春季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Mg基LPSO構造の形成過程と安定性評価へのX線その場測定法の応用2017

    • Author(s)
      奥田浩司、山崎倫昭、河村能人、木村滋
    • Organizer
      日本金属学会秋季大会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] XAFSによるMg85Y9Zn6-LPSO構造におけるクラスターの局所構造解析2017

    • Author(s)
      近都康平、杉野智弘、奥田浩司、田渕雅夫、君塚肇、山崎倫昭、河村能人
    • Organizer
      日本金属学会秋季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Mg85Zn6Y9周辺組成におけるアモルファスリボンからのLPSO形成過程2017

    • Author(s)
      安岡祐樹、東森稜、奥田浩司、山崎倫昭、河村能人
    • Organizer
      日本金属学会秋季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Microstructural Evolution from Amorphous to LPSO in Mg-Y-Zn and Mg-Gd-Zn Alloys Examined by In-situ Small- and Wide- Angle X-ray Scattering2016

    • Author(s)
      H.Okuda, H.Tanaka,Y.Yasuoka,M.Yamasaki,Y.Kawamura
    • Organizer
      LPSO2016
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Local atomic configratuions of 18R type long-period stacking ordered structuresin Mg85Y9Zn6 alloys examined by EXAFS2016

    • Author(s)
      T.Sugino,H.Okuda,H.Kimizuka,M.Yamasaki,Y.Kawamura
    • Organizer
      LPSO2016
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of LPSO structures in MgYZn ternary alloys examined by extended small- and wide-angle scattering2016

    • Author(s)
      H.Okuda,H.Tanaka,T.Sugino,M.Yamasaki,Y.Kawamura,S.Kimura,M.Tabuchi,H.Kimizuka
    • Organizer
      PRICM8
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi