Reconstructed 3D images of crack initiation inside CFRP (carbon-fiber reinforced plastics) observed by nanoscopic X-CT installed at the beamline of PF-AR NW2. Black: carbon fibers and red: cracks (plastics are not shown).
Feb. 19, 2022
Nanoscale fracture mechanism in CFRPs is still debated owing to the considerable difficulty in determining the three-dimensional mechanism of fracture using conventional techniques such as optical and/or electron mi- croscopy relying on side-surface- and fracture-surface-based observation. In this study, microscopic damages such as fiber/matrix debonding and microcracks under mixed-mode (mode I + II) loading are characterized in situ using nondestructive nanoscopic synchrotron radiation X-ray computed tomography (nanoscopic SR X-CT).
We need a new type pf approch to analyze the big data obtained by X-ray microscopy. We have carried out reseaches as one of the team: Materials Science Gr in "The data descriptive science project" (Grant-in-Aid for Transformative Research Areas (A) 22H05109) .
It's a new challenge to combine materials science and applied mathematics!
The heterogeneity in materials, such as microstructures, phase, and chemical states, are visualized using X-ray microscopy in 2D, 3D, 4D, ... 5D. Then we are trying to find ‘trigger sites’, where the key reactions dictate macroscopic properties.
Dynamic observations have been carried out with a wide range in time-resolutions from ns to ms to in situ observation of various reactions.
New approaches using XAFS and other techniques have been developed to investigate surfaces, interfaces, and nano-clusters.
Materials Integration (MI) uses all scientific knowledge to help research and development of materials. A new approch using applied mathematics has been developed...
Name of projects (&LINK) | Members in KEK (*Leader in KEK) |
The data-descriptive-science project (JST Grant-in-Aid for Transformative Research Areas) | *M. Kimura, Y. Niwa, D. Kido |
Fatigue mechanism of CFRP
(JST-Mirai Program) | *M. Kimura, Y. Niwa, D. Kido |
Electrochemical reduction of carbon dioxide using hydride-containing oxides (JST CREST) | *S. Nozawa |
Strucutral visualization of photochemical reaction with time-resolved X-ray solution scattering
(JST Grant-in-Aid for Specially Promoted Research) | *S. Adachi, S. Nozawa |
Electron Transfer Networks of Transition Metal Cluster Complexes for Catalytic Applications
(JST CREST) | *K. Kimijima, Y. Niwa |