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Synchrotron X-ray multiscale tomography is a 3D imaging method that combines microtomography and nanotomography to perform a high spatial resolution measurement with a wide field of view. We show how this method can be used to track the 3D microstructural evolution at multiple length scales in powder processing, sintering, and microfracture of ceramics. Heterogeneity, complexity, diversity, and hierarchical structure of powder compact lead to various types of defects that control the quality, reliability, and lifetime of products. The elimination and formation of defects are affected by applied stress in spark plasma sintering and by internal stresses generated during differential sintering and constrained sintering. The complex subsurface crack system induced by Vickers indentation demonstrates how heterogeneous microstructures control the toughening mechanisms.

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  This is the peer reviewed version of the following article: Synchrotron X-ray multiscale tomography: Visualization of heterogeneous microstructures and defects in ceramics, which has been published in final form at https://doi.org/10.1111/jace.19366. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

Keyword: defects, microstructure, sinter/sintering, X-ray computed tomography

Date published: 2023-08-07

Publisher: Wiley

Journal:

• Journal of the American Ceramic Society (ISSN: 15512916) vol. 107 issue. 3 p. 1706-1724

Funding:

• New Energy and Industrial Technology Development Organization (NEDO) JPNP22005
• JSPS KAKENHI JP19K15289
• JSPS KAKENHI JP22K14494
• Hosokawa Powder Technology Foundation and the Collaborative Research Projects of Laboratory for Materials and Structures
• Institute of Innovative Research, Tokyo Institute of Technology

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4457

First published URL: https://doi.org/10.1111/jace.19366

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Updated at: 2024-08-03 08:30:25 +0900

Published on MDR: 2024-08-03 08:30:25 +0900