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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/).
TEM investigation of the joint: (a) Bright-field TEM micrograph and SAED patterns of P1; (b) Bright-field TEM micrograph and SAED pattern of P2; (c) EDX spectrum of P1; (d) EDX spectrum of P2.