Highly functionalizing of ceramics with heat resistance and environmental resistance

2023 Fiscal Year Final Research Report

• Project Area: New Materials Science on Nanoscale Structures and Functions of Crystal Defect Cores
• Project/Area Number: 19H05792
• 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: Japan Fine Ceramics Center
• Principal Investigator: Kiitaoka Satoshi 一般財団法人ファインセラミックスセンター, その他部局等, 理事 副所長 (80416198)
• Co-Investigator(Kenkyū-buntansha): 吉田 英弘 東京大学, 大学院工学系研究科(工学部), 教授 (80313021) ; 中平 敦 大阪公立大学, 大学院工学研究科, 教授 (90172387)
• Project Period (FY): 2019-06-28 – 2024-03-31
• Keywords: 酸化物 / ポテンシャル場 / 物質移動 / 界面 / 粒界 / 表面 / 欠陥

Outline of Final Research Achievements

The relationship between functional cores and properties that were emerged in various potential fields in oxide ceramics with excellent heat and environmental resistance has been elucidated, and new functionalities and innovative processes for oxides have been developed. For example, guidelines for improving environmental barrier properties and structural stability of protective coatings were proposed by controlling ion diffusion via lattice defects introduced on the surface and through grain boundary cores under high-temperature oxygen potential gradients. Additionally, crystal structures and morphology of oxide nano particles were successfully controlled using functional cores emerged in high chemical potential fields of solvents and solutes. Functional cores formed under high electromagnetic fields contribute to emergence of new functions such as sintering densification, pseudoelasticity, and fluorescence.

Free Research Field

腐食・防食

Academic Significance and Societal Importance of the Research Achievements

高温酸素ポテンシャル勾配下における機能コアを介した酸化物中の物質移動制は、高温過酷環境下で作動する様々な部材の環境遮蔽性と組織安定性の向上に展開できる。また、高化学ポテンシャル溶媒下において機能コアを利用した酸化物の組織制御は、ナノ粒子の高純度化や、高アスペクト比の粒子フィラーと樹脂との複合化による部材の機械的特性向上等に有効である。高電磁場下において形成した機能コアを利用した酸化物の超高速焼結は、セラミックスの焼成プロセスの革新的省エネ化に貢献するだけでなく、セラミックス部材の接合や塑性加工等の新規プロセス創出にも展開できる。