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The effect of initial grain size on the flash event was examined in micro-crack healing behavior under DC electric field in fine- and coarse-grained 8 mol% Y2O3 stabilized cubic ZrO2 (8Y-CSZ) polycrystals. The healing behavior depends strongly on the initial grain size and is apparently accelerated in fine grained 8Y-CSZ than in coarse grained one. Since the crack healing under the flash event is higher than that of static annealing treatment without the electric field, the enhanced healing phenomena cannot be explained only by the thermal effect caused by Joule heating, but non-thermal effects caused by the flash event. The grain size dependent healing behavior indicates that the grain boundaries play an important role in the flash event and the flash healing would be accelerated through the field/current-enhanced diffusional processes, especially though the grain boundary diffusivity of the cations.

権利情報:

• In Copyright
  This is the peer reviewed version of the following article:Takahashi, S., Morita, K., Nambu, K., Terada, D., Kobayashi, K., Tokunaga, T. and Yamamoto, T. (2023), Effect of Initial Grain Size on Crack Healing Behavior under DC Electric Field of Zirconia (8Y-CSZ) Ceramic. Adv. Eng. Mater., 25: 2201807, which has been published in final form at https://doi.org/10.1002/adem.202201807. 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.

キーワード: crack healing, flash event, current effect, zirconia

刊行年月日: 2023-03-03

出版者: Wiley

掲載誌:

• Advanced Engineering Materials (ISSN: 15272648) vol. 25 issue. 18 2201807

研究助成金:

• JST JPMJCR1996 (CREST)
• JSPS 20H02444 (KAKENHI)
• JSPS 22J11973 (KAKENHI)

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4770

公開URL: https://doi.org/10.1002/adem.202201807

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更新時刻: 2024-09-25 16:30:45 +0900

MDRでの公開時刻: 2024-09-25 16:30:45 +0900