Fabrication and Mechanical Properties of Aluminum-Carbon Nanotube Functionally-Graded Cylinders

Author's Department

Mechanical Engineering Department

Second Author's Department

Mechanical Engineering Department

Third Author's Department

Mechanical Engineering Department

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https://reader.elsevier.com/reader/sd/pii/S2589152919301474?token=91360AEFCEAFD1EF7F8A01B1B4221BF6EA4F5C3387804EEA86C818C132DB0D559170D53A7322FC0D560A82402B2AA62E

All Authors

Ehab I. Salama; Sherry S.Morad; Amal M.Esawi

Document Type

Research Article

Publication Title

Materialia

Publication Date

9-1-2019

doi

10.1016/j.mtla.2019.100351

Abstract

In spite of strong theoretical interest, limited experimental studies have investigated the production of functionally-graded (FG) Aluminum-Carbon Nanotube (Al-CNT) composites. Such studies focused on axially-layered FG structures because of their ease of manufacturing. In order to take advantage of the full potential of FG Al-CNT, methods to fabricate bulk components of various shapes are needed. In the current work, Al-CNT functionally graded cylinders with varying CNT content along the radial direction were prepared for the first time. A novel and simple method was used to generate the composition gradient. The composite was designed to have 2 wt.% CNT at the cylinder surface where it can provide the highest strength and hardness. Pure as-received Al was placed at the core of the cylinders to provide overall ductility. The FG samples exhibited excellent bonding between the layers, increased strength and hardness at the surface in addition to a unique combination of high strength, hardness, and ductility, which exceeded those of homogeneous Al-CNT composites of the same composition.

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Last Page

7

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