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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 (https://creativecommons.org/licenses/by/4.0/).
(a) The electrical conductivities of Al/Gr composites with different graphene spraying times. (b) XRD patterns of Al, Al/Gr10, Al/Gr50 and Al/Gr80 composites after hot pressing at 655 °C with a pressure of 50 MPa.