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To assess the strength of coatings under multi-axial stress conditions, a method was developed to evaluate the biaxial strength of thin silicon carbide (SiC) coatings using a ring-on-ring test. A graphite substrate was used as an intermediary to transmit stress from the load ring to the coated specimen, and the thin coating was subjected to a uniform equi-biaxial stress. The strain in the thin film was continuously monitored using digital image correlation, allowing the identification of the time at which and when the initial crack occurred; the stress applied to the loading area at time was determined to be the fracture strength of the thin SiC films. The obtained fracture strength ranged from 209 to 1014 MPa and was dependent on specimen volume. Notably, the thinnest specimen exhibited the highest strength, whereas the strengths of thicker specimens approached previously reported bulk strengths.

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  This is the peer reviewed version of the following article: Iwamoto S, Kondo S, Katsui H, Shimoda K, Yu H, Ogino Y, et al. Evaluation of equi-biaxial strength of thin sic coatings using ring-on-ring testing and digital image correlation. Int J Appl Ceram Technol. 2024; 21: 2738–2746 which has been published in final form at https://doi.org/10.1111/ijac.14553. 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: Coating, corrosion resistance, films, silicon carbide

Date published: 2023-09-19

Publisher: Wiley

Journal:

• International Journal of Applied Ceramic Technology (ISSN: 1546542X) vol. 21 issue. 4 p. 2738-2746

Funding:

• 文部科学省原子力システム研究開発事業 JPMXD0222682488

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5121

First published URL: https://doi.org/10.1111/ijac.14553

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Updated at: 2024-12-10 16:30:21 +0900

Published on MDR: 2024-12-10 16:30:22 +0900