【公開日：2024.07.25】【最終更新日：2024.05.18】
課題データ / Project Data
課題番号 / Project Issue Number
23UT0079
利用課題名 / Title
CPO development during diffusion creep of two-phase crystalline aggregates
利用した実施機関 / Support Institute
東京大学 / Tokyo Univ.
機関外・機関内の利用 / External or Internal Use
内部利用（ARIM事業参画者以外）/Internal Use (by non ARIM members)
技術領域 / Technology Area
【横断技術領域 / Cross-Technology Area】（主 / Main）計測・分析/Advanced Characterization（副 / Sub）-
【重要技術領域 / Important Technology Area】（主 / Main）次世代ナノスケールマテリアル/Next-generation nanoscale materials（副 / Sub）-
キーワード / Keywords
Non-metallic structural materials,電子顕微鏡/ Electronic microscope,電子回折/ Electron diffraction
利用者と利用形態 / User and Support Type
利用者名（課題申請者）/ User Name (Project Applicant)
Mukhopadhyay Manaska
所属名 / Affiliation
東京大学 地震研究所
共同利用者氏名 / Names of Collaborators in Other Institutes Than Hub and Spoke Institutes
ARIM実施機関支援担当者 / Names of Collaborators in The Hub and Spoke Institutes
利用形態 / Support Type
（主 / Main）機器利用/Equipment Utilization（副 / Sub）-
利用した主な設備 / Equipment Used in This Project
UT-102：高分解能走査型分析電子顕微鏡
UT-103：高分解能走査型電子顕微鏡
報告書データ / Report
概要（目的・用途・実施内容）/ Abstract (Aim, Use Applications and Contents)
Experimental investigations into high-temperature creep of mineral aggregates have yielded valuable insights not easily discernible in natural settings. These include understanding the variations in rock strength under diverse geological conditions like stress, temperature, chemical compositions, and grain size. Additionally, these experiments shed light on the evolution of rock microstructure, including changes in crystallographic preferred orientation (CPO) during deformation. In this current research, the diffusion creep mechanism in pyroxene under high temperature pressure condition using pure shear experiments is studied, and SEM and EBSD studies were conducted using Scanning electron microscopy and Electron Back scattered Diffraction technique.
実験 / Experimental
Experimental analysis of DiFo10 and DiAn10 rock aggregates were performed, in high temperature pure shear condition, to understand the creep mechanism and resulting crystallographic preferred orientation in them.
結果と考察 / Results and Discussion
The deformed samples were analysed through SEM (JSM - 7800F) for detailed microstructural study. Samples were prepared in three mutually perpendicular planes (xy, xz and yz) to check and understand the occurrence of any crystallographic preferred orientation developed due to deformation. Analysis of grain size before and after deformation also gave us an idea about the grain growth occurred during the experiment. Further investigation of CPO was carried out by EBSD Analysis (JSM-7000F). A preliminary idea of microstructure and the corresponding CPO pattern of sample DiFo10 is provided in Figure 1, 2a and 2b. Elemental analysis or chemical characterization of the sample was also done using the EDX study by JSM-7800F (Figure 3a, 3b).
SEM analysis were done thoroughly done in DiAn10 samples as well, both for pre-deformed (Figure 4) and for deformed (Figure 5). Similar EDX (Figure 6, Figure 8a, 8b) and EBSD study (Figure 7a, 7b and 7c) were performed to check the CPO formed for this particular composition. Finally a comparison of both DiFo10 and DiAn10 was done to visualise the differences in deformation pattern and resulting microstructure for both the compositional aggregates, where we found that there is a stark difference in their CPO pattern. Further study is yet to be done to more understand the creep pattern.
図・表・数式 / Figures, Tables and Equations
Figure 1. DiFo10 SEM
Figure 2a. DiFo10 EBSD
Figure 2b. DiFo10 EBSD
Figure 3a. DiFo10 1170degC EDX
Figure 3b. DiFo10 1170degC EDX-Mapping
Figure 4. SEM images of pre-deformed DiAn10
Figure 5. Microstructure of deformed DiAn10
Figure 6. EDX Point analysis of DiAn10
Figure 7a. EBSD analysis of DiAn10 (Location 1)
Figure 7b. EBSD analysis of DiAn10 (Location 2)
Figure 7c. EBSD analysis of DiAn10 (Location 3)
Figure 8a. DiAn10 EDX
Figure 8b. DiAn10 EDX-Mapping
Figure 9. Comparison of CPO between deformed DiAn10 and DiFo10
その他・特記事項（参考文献・謝辞等） / Remarks(References and Acknowledgements)
I acknowledge Professor Takehiko Hiraga for the continued guidance and encouragement throughout this project.References:1. Koizumi, S., Hiraga, T., Tachibana, C., Tasaka, M., Miyazaki, T., Kobayashi, T., et al. (2010). Synthesis of highly dense and fine-grained aggregates of mantle composites by vacuum sintering of nano-sized mineral powders. Physics and Chemistry of Minerals, 37(8), 505–518. https://doi.org/10.1007/s00269-009-0350-y2. Koizumi, S., Hiraga, T., & Suzuki, T. S. (2020). Vickers indentation tests on olivine: size effects. Physics and Chemistry of Minerals, 47(2), 8.3. Ghosh, S., Koizumi, S., & Hiraga, T. (2021). Diffusion creep of diopside. Journal of Geophysical Research: Solid Earth, 126, e2020JB019855. https://doi.org/10.1029/2020JB0198554. Yabe, K., Koizumi, S., & Hiraga, T. (2023). Diffusion creep characteristics of anorthite revealed by uniaxial and pure shear deformation experiments. Journal of Geophysical Research: Solid Earth, 128, e2022JB024752. https://doi.org/10.1029/2022JB0247525. Kim, N., Ando, A., Yabe, K., & Hiraga, T. (2022). Olivine morphology and fabric during diffusion creep: Pure shear experiments. Journal of Geophysical Research: Solid Earth, 127, e2021JB023613. https://doi.org/10.1029/2021JB023613
成果発表・成果利用 / Publication and Patents
論文・プロシーディング（DOIのあるもの） / DOI (Publication and Proceedings)
口頭発表、ポスター発表および、その他の論文 / Oral Presentations etc.
特許 / Patents
特許出願件数 / Number of Patent Applications：0件
特許登録件数 / Number of Registered Patents：0件