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Open AccessArticle

New Nanocomposite Materials with Improved Mechanical Strength and Tailored Coefficient of Thermal Expansion for Electro-Packaging Applications

1
Department of Applied Science and Technology, Politecnico Di Torino, Corso Duca Degli Abruzzi 24, 10129 Torino, Italy
2
Department of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad 8514143131, Iran
*
Author to whom correspondence should be addressed.
Metals 2017, 7(12), 536; https://doi.org/10.3390/met7120536
Received: 31 October 2017 / Revised: 27 November 2017 / Accepted: 28 November 2017 / Published: 1 December 2017
(This article belongs to the Special Issue Metal Matrix Composites)
In this research, copper nanocomposites reinforced by graphene nanoplatelets (GNPs) were fabricated using a wet mixing method followed by a classical powder metallurgy route. In order to find the best dispersion technique, ball milling and wet mixing were chosen. Qualitative evaluation of the structure of the graphene after mixing indicated that the wet mixing is an appropriate technique to disperse the GNPs. Thereafter, the influence of graphene content on microstructure, density, hardness, elastic modulus, and thermal expansion coefficient of composites was investigated. It was shown that by increasing the graphene content the aggregation of graphene is more obvious and, thus, these agglomerates affect the final properties adversely. In comparison with the unreinforced Cu, Cu–GNP composites were lighter, and their hardness and Young’s modulus were higher as a consequence of graphene addition. According to the microstructural observation of pure copper and its composites after sintering, it was concluded that grain refinement is the main mechanism of strengthening in this research. Apart from the mechanical characteristics, the coefficient of thermal expansion of composites decreased remarkably and the combination of this feature with appropriate mechanical properties can make them a promising candidate for use in electronic packaging applications. View Full-Text
Keywords: metal matrix nanocomposite; copper; graphene; dispersion; powder metallurgy; thermal expansion coefficient; thermal conductivity; electrical resistance metal matrix nanocomposite; copper; graphene; dispersion; powder metallurgy; thermal expansion coefficient; thermal conductivity; electrical resistance
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MDPI and ACS Style

Saboori, A.; Moheimani, S.K.; Pavese, M.; Badini, C.; Fino, P. New Nanocomposite Materials with Improved Mechanical Strength and Tailored Coefficient of Thermal Expansion for Electro-Packaging Applications. Metals 2017, 7, 536. https://doi.org/10.3390/met7120536

AMA Style

Saboori A, Moheimani SK, Pavese M, Badini C, Fino P. New Nanocomposite Materials with Improved Mechanical Strength and Tailored Coefficient of Thermal Expansion for Electro-Packaging Applications. Metals. 2017; 7(12):536. https://doi.org/10.3390/met7120536

Chicago/Turabian Style

Saboori, Abdollah; Moheimani, Seyed K.; Pavese, Matteo; Badini, Claudio; Fino, Paolo. 2017. "New Nanocomposite Materials with Improved Mechanical Strength and Tailored Coefficient of Thermal Expansion for Electro-Packaging Applications" Metals 7, no. 12: 536. https://doi.org/10.3390/met7120536

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