Formation of ceramics using transformation from metastable system to equilibrium system and its application

• Project/Area Number: 20760506
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Metal making engineering
• Research Institution: Osaka University
• Principal Investigator: NAGIRA Tomoya Osaka University, 大学院・工学研究科, 助教 (00379124)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2009: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2008: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 過冷融液 / 共晶セラミックス / 準安定 / 準安定系 / セラミックス

Research Abstract

The purpose of this study is to develop the new ceramics formation process using the undercooled melt produced by melting of the metastable system. The transformation mode from the metastalbe eutectic to the equilibrium eutectic and the mechanism of the eutectic growth from undercooled melt were clarified by the crystallographic orientation analysis and the three-dimensional observation. The microstructural control for the application of our process was performed, and the mechanical properties and the formability were investigated

Research Products

• [Journal Article] Chain structure in the unidirectionally solidified Al_2O_3-YAG-ZrO_2 eutectic composite (2009)
  • Author(s): Tomoya Nagira, Hideyuki Yasuda, Satoshi Takeshima, Takumi Sakimura, Yoshiharu Waku, Kentarou Uesugi
  • Journal Title: J. crystal growth 311 Pages: 3765-3770
  • Peer Reviewed
• [Journal Article] Formation and Microstucture of Al_2O_3-YAG eutectic Ceramics by Phase Transformation from Metastable system to Equilibrium system (2009)
  • Author(s): Tomoya Nagira, Hideyuki Yasuda, Masato Yoshiya
  • Journal Title: Journal of Physics; Conference Series 165 Pages: 12006-12006
  • Peer Reviewed
• [Journal Article] High temperature strength of the Al_2O_3-YAG eutectic composite by using transformation from metastable eutectic to equilibrium eutectic (2009)
  • Author(s): Tomoya Nagira, Hideyuki Yasuda, Masato Yoshiya, Takeharu Katou
  • Journal Title: Proceedings of the 3rd International Conference of Processing Materials for Properties(PMP-III) Pages: 977-982
  • Peer Reviewed
• [Journal Article] Chain structure in the unidirectionally solidified Al_2O_3YAG-ZrO_2 eutectic composite (2009)
  • Author(s): T.Nagira, H.Yasuda, 他4名
  • Journal Title: J.crystal growth 311 Pages: 3765-3770
  • Peer Reviewed
• [Journal Article] Formation and Microstructure of Al_2O_3-YAG eutectic Ceramicsby Phase Transformation from Metastable system to Equilibrium system (2009)
  • Author(s): T.Nagira, H.Yasuda, M.Yoshiya
  • Journal Title: Journal of Physics ; Conference Series 165 Pages: 12006-12006
  • Peer Reviewed
• [Journal Article] High Temperature Strength of the Al_2O_3-YAG Eutectic Composite Produced by Using Transformation from Metastable Eutectic to Equilibrium Eutectic (2009)
  • Author(s): T.Nagira, H.Yasuda, 他2名
  • Journal Title: Proceedings of the 3rd International Conference of Processing Materials for Properties (PMP-III) Pages: 977-982
  • Peer Reviewed
• [Journal Article] Formation and Microstucture of Al_2O_3-YAG eutectic Ceramics by Phase Transformation from Metastable system to Equilibrium system
  • Author(s): Tomoya Nagira
  • Journal Title: Journal of Physics ; Conference Series (印刷中)
  • Peer Reviewed
• [Presentation] High Temperature Flexural Strength of the Al_2O_3-YAG Eutectic Composites Produced By Using Transformation From Metastable Eutectic to Equilibrium Eutectic (2009)
  • Author(s): T. Nagira, H. Yasuda, M. Yoshiya, T. Katou
  • Organizer: The Third International Conference of Processing Materials for Properties(PMP-III)MMIJ
  • Place of Presentation: Session, Sapporo
  • Year and Date: 2009-09-07
• [Presentation] High Temperature Flexural Strength of the Al_2O_3-YAG Eutectic Composites Produced By Using Transformation From Metastable Eutectic to Equilibrium Eutectic (2009)
  • Author(s): T.Nagira
  • Organizer: The Third International Conference of Processing Materials for Properties(PMP-III) MMIJ Session
  • Place of Presentation: Sapporo, Hokkaido
  • Year and Date: 2009-09-07
• [Presentation] Al_2O_3-YAG系における準安定共晶溶解と平衡共晶凝固が連成した一方向溶解・凝固II (2009)
  • Author(s): 秦野了輔、柳楽知也、安田秀幸、吉矢真人
  • Organizer: 日本金属学会2009年春期大会
  • Place of Presentation: 東京工業大学大岡山キャンパス
  • Year and Date: 2009-03-30
• [Presentation] Al_2O_3-YAG平衡共晶の組織形成に及ぼすAl_2O_3-YAP準安定共晶の影響 (2009)
  • Author(s): 柳楽知也、秦野了輔、安田秀幸、吉矢真人、上杉健太朗
  • Organizer: 日本金属学会2009年春期大会
  • Place of Presentation: 東京工業大学大岡山キャンパス
  • Year and Date: 2009-03-30
• [Presentation] Unidirectional sodlification of Al_2O_3-YAG from an undercooled melt produced by melting of Al_2O_3-YAP metastable eutectic (2009)
  • Author(s): T. Nagira, R. Hatano, M. Maeno, M. Yoshiya, H. Yasuda
  • Organizer: Directional Solidified Eutectic Ceramics 3
  • Place of Presentation: Spain, Sevella
• [Presentation] 結晶方位解析による準安定共晶の溶解を利用したAl_2O_3-YAG共晶の組織形成の理解 (2009)
  • Author(s): 柳楽知也、秦野了輔、安田秀幸、吉矢真人、加藤丈晴
  • Organizer: 日本金属学会2009年秋期大会
  • Place of Presentation: 京都大学吉田キャンパス
• [Presentation] Al_2O_3-M_2O_3(M=Dy, Ho, Er)系における準安定共晶の再溶解を利用した平衡共晶組織の作製 (2009)
  • Author(s): 前野光彦、秦野了輔、柳楽知也、安田秀幸、吉矢真人
  • Organizer: 日本金属学会2009年秋期大会
  • Place of Presentation: 京都大学吉田キャンパス
• [Presentation] "Temperature Dependence of Flexural Strength of Al_2O_3-YAG Eutectic Composites Produced By Transformation From Metastable Eutectic to Equilibrium Eutectic, "International Conference on Processing and Manufacturing of Advanced Materials Processing (2009)
  • Author(s): T. Nagira, H. Yasuda, M. Yoshiya K. Uesugi, T. Katou
  • Organizer: Fabrication, Properties, Applications(THERMEC'2009)
  • Place of Presentation: Berlin, Germany
• [Presentation] Temperature Dependence of Flexural Strength of Al_2O_3-YAG Eutectic Composites Produced By Transformation From Metastable Eutectic to Equilibrium Eutectic (2009)
  • Author(s): T.Nagira
  • Organizer: International Conference on Processing and Manufacturing of Advanced Materials Processing, Fabrication, Properties, Applications(THERMEC'2009)
  • Place of Presentation: Berlin, Germany
• [Presentation] 結晶方位解析による準安定共晶の溶解を利用したAl_2O_3-YAG共晶の組織形成の理解 (2009)
  • Author(s): 柳楽知也
  • Organizer: 日本金属学会2009年秋期大会
  • Place of Presentation: 京都市
• [Presentation] Al_2O_3-M_2O_3(M=Dy, Ho, Fr)系における鞍定共晶の再溶解を利用した平衡共晶組織の作製 (2009)
  • Author(s): 前野光彦
  • Organizer: 日本金属学会2009年秋期大会
  • Place of Presentation: 京都市
• [Presentation] Application of high-resolution imaging tomography for Al_2O_3 based eutectic ceramics (2008)
  • Author(s): Tomoya NAGIRA, Hideyuki YASUDA, Masato YOSHIYA, Kentarou UESUGI
  • Organizer: 1st Workshop on Micro- and Nano-tomography.
  • Year and Date: 2008-11-17
• [Presentation] Application of high-resolution imaging tomography for Al_2O_3 based eutectic ceramics (2008)
  • Author(s): Tomoya Nagira
  • Organizer: 1st Workshop on Micro- and Nano-tomography
  • Place of Presentation: SPring-8
  • Year and Date: 2008-11-17
• [Presentation] Al_2O_3-YAG系における準安定共晶溶解と平衡共晶凝固が連成した一方向溶解・凝固 (2008)
  • Author(s): 秦野了輔、柳楽知也、安田秀幸、吉矢真人、古澤寛顕
  • Organizer: 日本金属学会2008年秋期大会
  • Place of Presentation: 熊本大学黒髪キャンパス
• [Presentation] 準安定共晶を利用した一方向溶解・凝固Al_2O_3-YAG共晶の組織形成 (2008)
  • Author(s): 柳楽知也、秦野了輔、安田秀幸、吉矢真人、古澤寛顕、上杉健太朗
  • Organizer: 日本金属学会2008年秋期大会
  • Place of Presentation: 熊本大学黒髪キャンパス
• [Presentation] 準安定共晶を利用した一方向溶解・凝固Al_2O_3-YAG共晶の組織形成 (2008)
  • Author(s): 柳楽知也
  • Organizer: 日本金属学会
  • Place of Presentation: 熊本大学
• [Presentation] Al_2O_3-YAG系における準安定共晶溶解と平衡共晶凝固が連成した一方向溶解・凝固 (2008)
  • Author(s): 秦野了輔
  • Organizer: 日本金属学会
  • Place of Presentation: 熊本大学
• [Presentation] Al_2O_3-YAG eutectic growth evolution in the solidification accompanied by the melting of the Al_2O_3-YAP metastable eutectic (2008)
  • Author(s): R. Hatano
  • Organizer: 4th International Symposium on Designing, Processing and Properties of Advanced Engineering Materials (ISAEM-2008)
  • Place of Presentation: Nagoya University
• [Presentation] Formation and Microstructure of Al_2O_3-YAG Eutectic Ceramics by Phase Transformation from Metastable System to Equilibrium System (2008)
  • Author(s): Tomoya Nagira
  • Organizer: International Conference on Advanced Structure and Functional Materials Design 2008
  • Place of Presentation: Osaka University