2017 Fiscal Year Final Research Report
Study of the hetero-phase fluctuation in structural phase transition followed by the creation of novel concept of materials design and technologies
| Project/Area Number |
15K14111
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Physical properties of metals/Metal-base materials
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| Research Institution | Shizuoka Institute of Science and Technology |
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Principal Investigator |
Kubo Hiroshi 静岡理工科大学, 総合技術研究所, 客員教授 (30029904)
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| Co-Investigator(Renkei-kenkyūsha) |
Yoshida yutaka 静岡理工科大学, 理工学部, 教授 (40241129)
Nakayama masanobu 名古屋工業大学, 工学研究科, 准教授 (10401530)
Takesue naohisa 福岡大学, 理学部, 教授 (20292758)
Sahara ryouji 独立行政法人物質・材料研究機構, 研究員 (30323075)
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| Research Collaborator |
Sluiter Marcel H. F. オランダデルフト大学, 材料学科, 教授
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 相転移の熱統計力学 / Landau展開係数の秩序規則 / 中性子回折セントラルピーク / ヘテロ構造揺らぎ / 相転移kineticsの梯子登り理論 / ZrNb合金ω相転移 / 誘電体相転移 / ZrNb合金核燃料被覆材 |
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| Outline of Final Research Achievements |
The concept of the project is to study the mechanism of hetero-phase fluctuation of micro-domains formed in the bulk materials in structural phase transition, and accordingly to create the novel concept of materials design and technologies.
Three significant breakthroughs are made in the study of the science of structural phase transition. One is the establishment of statistical thermodynamics of Landau expansion model, where the sequence rule of the expansion coefficients in the Landau-type series is discovered and applied in the analysis of critical transition region. Second major accomplishment is the proposal of ladder-climing model in the kinetics of hetero-phase fluctuation of micro-domains. Third is the establishment of the theory of central peaks in the inelastic neutron scattering which has been left unvigorously analyzed over 45 years. It is revealed that the hetero-phase fluctuation of micro-domains is responsible to the central peak of neutron scattering.
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| Free Research Field |
電子顕微鏡、構造相転移、熱統計力学、中性子線回折、
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