Hard X-ray nanoscale imaging of carbon fibre composites using Near-Field Ptychography

Margini, Marco, Karpov, Dmitry, Swolfs, Yentl, Breite, Christian, Lee, Yeajin, Mavrogordato, Mark, Sinclair, Ian, Spearing, S. Mark, Cloetens, Peter and Thibault, Pierre (2024) Hard X-ray nanoscale imaging of carbon fibre composites using Near-Field Ptychography. 13th Conference on Industrial Computed Tomography, , Wels, Austria. 06 - 09 Feb 2024. 6 pp .

Abstract

Near-Field Ptychography (NFP) is a powerful technique that allows reconstruction of both the complex-valued illumination field and transmission function of the sample, owing to its data redundancy. When combined with tomography, NFP can produce highresolution quantitative volumetric datasets. Here we present the application of this technique, combining a synchrotron radiation source with NFP, yielding a novel approach capable of providing a deeper understanding of the failure processes in carbon fibre reinforced polymers. Volumes based on the phase information retrieved with NFP, thus, will provide insights directly on the 3D electron density distribution of the sample. We performed these measurements at a 150 nm pixel size on a CFRP sample that previously underwent a tensile test up to ∼ 93% its maximum load. High-resolution 3D imaging data for fibre and matrix damage is crucial to understanding tensile failures. In this work, we address some of the features that can be appreciated at this resolution, and their implication in the understanding of the failure processes mentioned above.

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Contributors

Author: S. Mark Spearing

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