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. 2021 Oct 19;14(20):6201. doi: 10.3390/ma14206201

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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SEM micrographs of the fracture surface of PA12-ZrO₂ at magnifications of ×30 (a), ×1000 (b), and ×2000 (c); PA12-Al₂O₃ at magnifications of ×30 (d), ×1000 (e), and ×2000 (f).