Mechanical and Microstructural Characterization of an AZ91⁻Activated Carbon Syntactic Foam.

Nima Movahedi,Mehdi Taherishargh,Irina Belova,Thomas Fiedler,Graeme Murch

doi:10.3390/ma12010003

Nima Movahedi, Mehdi Taherishargh + Show 3 more

Open Access

https://doi.org/10.3390/ma12010003

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Journal: Materials	Publication Date: Dec 20, 2018
Citations: 26	License type: CC BY 4.0

Affiliation: University of Newcastle Australia

Abstract

In this study, activated carbon (AC) particles were combined with AZ91 alloy to manufacture a magnesium syntactic foam. This novel lightweight foam has a very low density, in the range of 1.12–1.18 gcm−3. The results show that no chemical reaction occurred between the AZ91 matrix and the activated carbon particles. The mechanical properties of the foam were evaluated under quasi-static compression loading conditions, and showed a consistent trend for the energy absorption of the fabricated AZ91–AC syntactic foams. The deformation mechanism of samples was a brittle fracture mode with the formation of shear bands during the fracture of all samples.

Highlights

On account of their low density and sound and energy absorption characteristics, porous materials have recently attracted a significant amount of attention
The average density of the novel AZ91/activated carbon (AC) syntactic foam is 1.14 gcm−3 and is close to the density of some of the open-cell magnesium foams reported in the literature with 1.13 and 1.03 gcm−3 [25]
The filling of some damaged hollow alumina fillers with molten magnesium could have increased the density of the AZ91–hollow alumina syntactic foam samples in [26]

Summary

Introduction

On account of their low density and sound and energy absorption characteristics, porous materials have recently attracted a significant amount of attention. These materials demonstrate unique physical and mechanical properties, making them especially suitable for use in various industries, such as the construction, automotive and medicine industries [1]. Metallic foams are a subset of porous materials. Because of their useful mechanical properties, they have been widely produced and evaluated [2]. Due to its high biocompatibility and lower density than other types of metallic materials, could be one of the most interesting and suitable candidates for the production of metallic foams [7] The various types of metallic foams available have been manufactured with different techniques [3,4,5,6].

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