Grain boundary structure of ceramics
| Project/Area Number |
26249088
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical properties of metals/Metal-base materials
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
佐々木 勝寛 名古屋大学, 工学(系)研究科(研究院), 准教授 (00211938)
徳永 智春 名古屋大学, 工学(系)研究科(研究院), 助教 (90467332)
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| Co-Investigator(Renkei-kenkyūsha) |
MUTO Shunsuke 名古屋大学, 未来材料システム研究所, 教授 (20209985)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥39,520,000 (Direct Cost: ¥30,400,000、Indirect Cost: ¥9,120,000)
Fiscal Year 2016: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Fiscal Year 2015: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
Fiscal Year 2014: ¥21,840,000 (Direct Cost: ¥16,800,000、Indirect Cost: ¥5,040,000)
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| Keywords | 結晶粒界 / 原子構造 / TEM / STEM / EELS / 焼結 / 粒界構造 / 窒化 / 粒界 / 電子状態 / SrTiO3 / 構造ユニット / HRTEM / FAST / FLASH / HAADF |
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| Outline of Final Research Achievements |
Unique coordination polyhedral are formed at grain boundaries, which are different from those in grain interiors. These unique coordination polyhedral often affect physical properties of polycrtals. In this study, we investigated that the relationship between the grain boundary structures and phenomena due to the unique coordination polyhedras. For example, applied electric fields greatly enhance the shrinkage rate of ceramic green compacts. The electric fields tend to concentrate at grain boundaries. The concentration of the fileds were found to reduce at/near grain boundaries by using HR-TEM/STEM, EELS and so on. In order to use the reducing phenomena, we could successfully nitrize oxide ceramic in air. In addition, the reducing effects were revealed to depend on the grain orientation relationship.
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Report
(4 results)
Research Products
(18 results)
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[Journal Article] Spatially-resolved mapping of history-dependent coupled electrochemical and electronical behaviors of electroresistive NiO2014
Author(s)
I. Sugiyama, Y. Kim, S. Jesse, E. Strelcov, A. Kumar, A. Tselev, E.K. Rahani, V. B. Shenoy, T. Yamamoto, N. Shibata, Y. Ikuhara, S.V. Kalinin
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Journal Title
Scientific Reports
Volume: 4
Issue: 1
Pages: 6725-6725
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Presentation] Domain structure of LSAT Single Crystal2014
Author(s)
S. Okada, K. Sasaki, T. Tokunaga, S. Kobayashi, T. Yamamoto
Organizer
The 4th International Symposium on Advanced Microscopy and Theoretical Calculations (AMTC4)
Place of Presentation
浜松 アクトシティ浜松
Year and Date
2014-05-08 – 2014-05-10
Related Report
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