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. 2018 Dec 26;12(1):77. doi: 10.3390/ma12010077

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© 2018 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 (http://creativecommons.org/licenses/by/4.0/).

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Micrographs of (a) NT, (b) H400, (c) H500, (d) H600 and (e) H700 samples under 50 times magnification with their typical grain shape highlighted. Scale bar: 20 µm.

Micrographs of (a) NT, (b) H400, (c) H500, (d) H600 and (e) H700 samples under 50 times magnification with their typical grain shape highlighted. Scale bar: 20 µm.